GBT Commisioning


Project Start Date: Tue 1/2/01
Project Finish Date: Sun 5/5/02

Task_Table1

NamePercent
Complete
Start
Date
Finish
Date
PriorityResource
Initials
PredecessorsSuccessorsNotes
Hardware
36%Tue 1/2/01Mon 4/29/02Medium   The implementation of hardware and any software needed to communicate with that hardware. ...
General hardware
93%Wed 1/10/01Tue 1/23/01High  11,60Basic hardware components that almost all commissioning tasks will depend upon. As such, these tasks have a high priority....
DCR tests
100%Wed 1/10/01Thu 1/11/01HighComm,M&C,Mock  Verify that DCR manager works, is correct, and is reliable....
LO1 tests
100%Thu 1/11/01Fri 1/12/01High   Verify that LO1 hardware works and that its manager works, is correct, and is reliable....
Test LO1 manager
100%Fri 1/12/01Fri 1/12/01HighComm,M&C,Mock  Verify that LO1 manager works, is correct, and is reliable. This work can be done without the GBT and as part of mockup testing. It is essentially a check that the software and hardware interfaces work properly. The work involves CLEO and the 'mocku...
Check LO1 frequency
100%Thu 1/11/01Thu 1/11/01HighComm,Eng,Mock  Verify that LO1 hardware works. This work can be done without the GBT and as part of mockup testing. The work involves CLEO and the 'mockup' installation.
I.F. Rack Tests
100%Fri 1/12/01Wed 1/17/01High   Verify that IF Rack hardware works and that its manager works, is correct, and is reliable....
Test I.F. manager
100%Tue 1/16/01Wed 1/17/01HighComm,M&C,Mock  Verify that IF Rack manager works, is correct, and is reliable. This work can be done without the GBT and as part of mockup testing. It is essentially a check that the software and hardware interfaces work properly. The work involves CLEO and the 'm...
Test I.F. hardware
100%Fri 1/12/01Wed 1/17/01HighComm,Eng,Mock  Verify that IF Rack hardware works. This work can be done without the GBT and as part of mockup testing. It is essentially a check that the software and hardware interfaces work properly. The work involves CLEO and the 'mockup' installation....
Test Switch Sig Sel
50%Fri 1/19/01Tue 1/23/01HighComm,M&C,Mock  Verify that the Switching Signal manager works, is correct, and is reliable....
Electronics ready for continuum commissioning
0%Tue 1/23/01Tue 1/23/01High 2181Milestone indicating that work has finished on the most critical hardware components for the first stages of commissioning.
Optical pointing telescope
0%Wed 1/3/01Wed 1/31/01High  15The optical pointing telescope will be extremely useful if it were available early during the commissioning of the GBT for determining pointing coefficients. As such, these tasks have a high priority....
Complete optical telescope hardware
0%Wed 1/3/01Tue 1/9/01HighComm,Eng  The telescope is not yet completed. It must be mounted and, if possible, have its automatic lens cap in place.
Complete optical telescope software
0%Thu 1/25/01Wed 1/31/01HighComm,M&C  The software for controlling the unit, acquiring the data, and processing the results has not yet been finished.
Optical pointing telescope ready for commissioning
0%Wed 1/31/01Wed 1/31/01High 12212Milestone indicating that work has finished on the optical pointing telescope for the first stages of commissioning....
Spectrometer hardware
50%Wed 1/24/01Fri 8/10/01Medium  29,60The spectrometer will be needed before spectral-line commissioning starts. For commissioning to proceed, only the low-speed, 3-bit mode needs to be implemented. The other modes have a low priority since commissioning can proceed without them and, as ...
Implement Spectrometer low-speed 3-level sampler modes
50%Wed 1/24/01Wed 2/7/01MediumM&C,Eng 18Engineering/programmers finish the low-speed/3-level mode of the Spectrometer for 1st round spectral-line commissioning. This is the only mode that other commissioning tasks will rely on.
Verify M&C manager robustness - Spectrometer
50%Fri 3/2/01Thu 3/15/01MediumComm,M&C,CLEO,Mock1719Verify that Spectrometer manager works, is correct, and is reliable....
Measure Spectrometer bandpass on CW signal - low speed
50%Fri 4/20/01Fri 5/4/01MediumComm,Mock,Eng,M&C1828These tests use a noise source for an input and the mockup and shouldn't require the GBT. Also needed will be Aips++ and CLEO....
Implement Spectrometer high-speed sampler modes
50%Thu 2/15/01Fri 2/23/01LowM&C,Eng 21Engineering/programmers finish the high-speed sampler modes. ...
Measure Spectrometer bandpass on CW signal - high speed
46%Mon 7/2/01Thu 7/12/01LowComm,Mock,Eng,M&C20 These tests use a noise source for an input and the mockup and shouldn't require the GBT. Also needed will be Aips++ and CLEO....
Implement Spectrometer 9-level modes
50%Fri 2/23/01Fri 3/2/01LowM&C,Eng 23Engineering/programmers finish the 9-level mode....
Measure Spectrometer bandpass on CW signal - 9-level
50%Tue 7/3/01Mon 7/16/01LowComm,Mock,M&C,Eng22 These tests use a noise source for an input and the mockup and shouldn't require the GBT. Also needed will be Aips++ and CLEO....
Implement Spectrometer pulsar mode
50%Fri 7/6/01Fri 8/10/01LowComm,M&C,Eng,CLEO  NOTE: The implementation of the pulsar mode has not yet been started and the effort is not yet well known. Subtasks still need to be defined. If the Spectrometer is unavailable when pulsar commissioning starts, attempts will be made to use the Spectr...
Spectral Processor hardware
25%Thu 3/8/01Tue 6/26/01Low  30,60The Spectral Processor hardware and software is essentially in good shape. However, no significant mockup tests have exercised the instrument, with its new interfaces, in the modes most users will want. Estimates here are broad guesses....
Implement spectral Line - SP
50%Thu 3/8/01Wed 3/28/01MediumComm,M&C 28SP Spectral-line mode is implemented/verified. -- Need to specify subtasks
Implement pulsar - SP
0%Tue 6/19/01Tue 6/26/01LowComm,M&C  SP pulsar mode is implemented/verified. --Need to specify subtasks
Electronics ready for spectral-line Commissioning
0%Fri 5/4/01Fri 5/4/01Medium 19,26310,34Milestone indicating that work has finished on the Spectrometer for the spectral-line stage of commissioning.
Spectrometer ready for general use
0%Fri 8/10/01Mon 8/13/01Low 16 Milestone indicating that work has finished on all of the Spectrometer and it is now ready for all users.
Spectral Processor ready for use
0%Tue 6/26/01Tue 6/26/01Low 25 Milestone indicating that Prime Focus 2 Receiver is ready for commissioning.
LO1 Counter Hardware
0%Fri 2/9/01Thu 4/5/01Medium  34,60The LO1 Counter's hardware/software interface has not yet been started. Without the counter, continuum commissioning can go on but will be awkward. Until the counter is completed, spectral-line commissioning will be difficult and Doppler tracking co...
Implement LO1 Counter
0%Fri 2/9/01Fri 2/16/01MediumM&C,Eng 33Engineering/programmers finish LO1 Counter's hardware and software interfaces.
Verify M&C manager robustness - LO1 Counter
0%Thu 3/29/01Thu 4/5/01MediumComm,M&C,CLEO,Mock32 Verify that the LO1 Counter manager works, is correct, and is reliable....
Electronics Ready for Doppler commissioning
0%Fri 5/4/01Fri 5/4/01Medium 31,28 Milestone indicating that work has finished on the LO1 Counter for the spectral-line stage of commissioning.
Holography hardware
0%Thu 2/1/01Thu 2/8/01Medium  60,38The Holography system needs to be completed and checked before we can begin holographic measurements of the GBT surface. The holographic system still needs some lab testing before being moved onto the telescope where other preliminary tests will be ne...
Verify M&C manager robustness - Holography
0%Thu 2/1/01Fri 2/2/01MediumComm,M&C,Mock 37Verify that the Holography manager works, is correct, and is reliable....
Measure Holography phase stability on CW signal
0%Thu 2/8/01Thu 2/8/01MediumComm,Eng,Mock36 Insures the hardware has sufficient phase stability. Tests require the mockup, a CW signal from a synthesizer, a power splitter. The tests include:...
Holography hardware ready for commissioning
0%Thu 2/8/01Thu 2/8/01Medium 35247Milestone indicating that work has finished on the Holography for the surface measurement stage of commissioning.
VLBI hardware and software
45%Fri 3/16/01Mon 4/29/02Medium  60,48These tasks implement an interfaces for performing VLB observations with the GBT. The tasks are in three stages:...
Specify VLBI software interfaces
100%Fri 3/16/01Thu 3/22/01MediumComm,Eng,M&C 42Specifies the software interface that will be used to control and coordinate the GBT and VLBA recorders
Upgrade VLBA software to current version
75%Tue 4/24/01Thu 5/3/01MediumComm,M&C,Eng 42Before designing and implementing the coordination software, the VLBA software will need to be upgraded and tested.
Design VLBI software communication
75%Fri 5/18/01Fri 5/25/01MediumComm,M&C,Eng40,4143Designing the detailed code that will perform the communication and control.
Code and test VLBI software
75%Fri 5/25/01Mon 6/4/01MediumComm,M&C,Eng,CLEO,Mock4247The actual VLBA coding followed by testing of the software and hardware.
Specify new S2 communication software
0%Tue 4/16/02Mon 4/22/02Very LowComm,M&C,Eng 45The specification and design of the software interfaces for controlling and coordinating the GBT and the S2 recorders.
Implement S2 system with GBT
0%Mon 4/22/02Mon 4/29/02Very LowComm,M&C,Eng,Mock44 The actual S2 coding followed by testing of the software and hardware.
Upgrade VLBA formatter for 2-recorders
0%Thu 4/18/02Wed 4/24/02Very LowComm,M&C,Eng,Mock  Hardware upgrade that will allow the use of two recorders simultaneously.
Preliminary VLBI hardware ready
0%Mon 6/4/01Mon 6/4/01Medium 43 Milestone indicating that work has finished on the VLB system for that stage of commissioning....
VLB/S2 hardware ready for general users.
0%Mon 4/29/02Mon 4/29/02Medium 39 Milestone indicating that all of the VLB system is ready for general users.
Measure clock & switching-signal delays
90%Sun 1/14/01Mon 1/15/01MediumComm,Eng,Mock  Measures round-trip timing delays for switching signals for pulsar observing.
40-52 GHz hardware/software
0%Tue 1/2/01Tue 4/10/01Medium  54,60,273,278The completion of the 40-52 GHz receiver system. The commissioning tasks that rely on this receiver are those that define the end of what has been called Phase II commissioning....
Complete 40-52 GHz hardware
0%Tue 1/2/01Tue 1/2/01Medium  52The 40-52 GHz receiver is already finished.
Implement 40-52 GHz M&C manager
0%Fri 2/2/01Mon 2/26/01MediumM&C,CLEO5153The hardware and software interfaces to the receiver's manager needs to be implemented. This includes developing the CLEO application for the receiver.
Verify 40-52 GHz M&C manager
0%Sat 4/7/01Tue 4/10/01MediumComm,M&C,Mock52 Verify that the 40-52 GHz Receiver manager works, is correct, and is reliable....
40-52 GHz Rcvr. ready for use
0%Tue 4/10/01Tue 4/10/01Medium 50354Milestone indicating that 40-52 GHz Receiver is ready for commissioning.
Prime Focus 2 hardware
0%Fri 6/1/01Tue 6/26/01Low  59,60The PF2 receiver might be finished by the beginning of summer 2000. No tasks requiring the receiver can proceed until about then. Because of the uncertainty of the delivery date and how far into the future it probably will be, these tasks and those t...
Complete PF2 hardware
0%Fri 6/1/01Fri 6/1/01LowEng 57The PF2 receiver might be finished by the beginning of summer 2000. No tasks requiring the receiver can proceed until about then.
Implement PF2 M&C manager
0%Mon 6/4/01Mon 6/25/01LowM&C,CLEO5658The hardware and software interfaces to the receiver's manager needs to be implemented. This includes developing the CLEO application for the receiver....
Verify PF2 M&C manager
0%Tue 6/26/01Tue 6/26/01LowComm,M&C,Mock57 Verify that the PF2 Receiver manager works, is correct, and is reliable....
Prime Focus 2 Rcvr. ready for use
0%Tue 6/26/01Tue 6/26/01Low 55274,439Milestone indicating that Prime Focus 2 Receiver is ready for commissioning.
All hardware has been Implemented
0%Mon 4/29/02Mon 4/29/02Medium 2,16,31,35,39,50,25,55 Milestone indicating all hardware components are ready for general use.
Observing techniques
20%Tue 1/2/01Mon 9/24/01Medium   The tools needed for observations. Task categories include:...
General observing techniques
100%Tue 1/2/01Tue 1/2/01Very High  93,107Observing techniques and tools that are prerequisites for any commissioning or astronomical observation. Priorities of these tasks are high since much of commissioning rely on the products of the tasks.
Verify observing catalogs/tables
100%Tue 1/2/01Tue 1/2/01Very HighGO,Mock,Comm  Uses the mockup to verify that "GBT Observe" can successfully execute files that cover many hours of observations.
Tracking
58%Wed 1/3/01Mon 1/22/01Very High  93,107Tasks that verify that the M&C system, under "GBT Observe" control, uses the correct algorithms for positioning the telescope. These tasks do not require the GBT but a combination of the mockup, code reviews, etc. Priorities are high since all focus/...
Verify ephemeredes calculations
50%Wed 1/3/01Tue 1/9/01Very HighComm,M&C,GO  Use mockup to verify the correctness of ephemeredes calculations used in "GBT Observe" and the Antenna manager. The resulting positions from mockup telescope moves are compared to those generated by an independent ephemeredes program.
Verify refraction calculations
50%Tue 1/9/01Mon 1/22/01Very HighComm,M&C,GO  Use mockup to verify the correctness of refraction calculations used in "GBT Observe" and the Antenna manager. When last checked, the results of the currently-implemented refraction calculations differ from those generated by algorithms that are promo...
Verify proper use of pointing coefficients
100%Mon 1/15/01Tue 1/16/01Very HighComm,M&C,GO  Use mockup to verify the correctness of pointing calculations used in "GBT Observe" and the Antenna manager.
Observing parameters for stage 1 commissioning
0%Tue 2/13/01Thu 2/15/01Very High  93,107The determination of the parameters that will best and most efficiently perform various types of observations needed for Stage 1 of commissioning. These parameters will be a function of beam size and, therefore, observing frequency. This is basically...
Determine cross scans optimum parameters(f)
0%Tue 2/13/01Wed 2/14/01Very HighComm,GO  The determination of the parameters that will best and most efficiently perform pointing cross scans as a function of frequency.
Determine focus scans optimum parameters(f)
0%Wed 2/14/01Thu 2/15/01Very HighComm,GO  The determination of the parameters that will best and most efficiently perform focus observations as a function of frequency.
Observing parameters for stage 2/general use
0%Thu 3/29/01Fri 6/29/01Low  94The determination of the parameters that will best and most efficiently perform various types of observations needed for Stage 2 of commissioning and general users. These parameters will be a function of beam size and, therefore, observing frequency. ...
Determine 5-point optimum parameters(f)
0%Thu 3/29/01Fri 3/30/01LowComm,GO  The determination of the parameters that will best and most efficiently 5-point pointing cross scans as a function of frequency..
Determine OTF optimum mapping parameters
0%Thu 6/21/01Thu 6/21/01LowComm,GO  The determination of the parameters that will best and most efficiently perform OTF mapping observations.
Determine position-switched parameters
0%Fri 6/22/01Fri 6/22/01LowComm,GO  The determination of the parameters that will best and most efficiently perform position-switched observations.
Determine frequency-switching parameters
0%Mon 6/25/01Mon 6/25/01LowComm,GO  The determination of the parameters that will best and most efficiently perform frequency-switched observations.
Determine beam-switching parameters
0%Tue 6/26/01Wed 6/27/01LowComm,GO  The determination of the parameters that will best and most efficiently perform beam-switched observations.
Determine polarization switching parameters
0%Wed 6/27/01Thu 6/28/01LowComm,GO  The determination of the parameters that will best and most efficiently perform polarization-switched observations.
Determine grid optimum mapping parameters
0%Thu 6/28/01Fri 6/29/01LowComm,GO  The determination of the parameters that will best and most efficiently perform a grid mapping observations.
Continuum observing techniques
69%Thu 1/18/01Mon 7/16/01Very High  118The creation and testing of continuum observing methods mostly residing within "GBT Observe" ...
Continuum observing techniques - Stage 1 commissioning
76%Thu 1/18/01Tue 2/13/01Very High  84,93The creation and testing of continuum observing methods needed at the earliest stages of commissioning. Hence, why these tasks have a high priority.
Verify continuum tracking observing script
100%Tue 1/23/01Tue 1/23/01Very HighComm,M&C,GO,Mock  Use the mockup to test continuum observing script for tracking a celestial position.
Implement and verify continuum cross-scans observing script
100%Wed 1/24/01Thu 1/25/01Very HighComm,M&C,GO,Mock  Implement the observing script for performing cross scans for pointing. Use the mockup to test the observing script. ...
Implement and verify PF and Greg. focus tracking script
50%Thu 1/18/01Tue 2/13/01Very HighComm,M&C,GO,Mock  Implement the observing script for performing observations for focus tracking. Use the mockup to test the observing script. ...
Continuum observing techniques - Stage 2 commissioning
84%Thu 1/25/01Wed 2/21/01Medium 8089,94The creation and testing of continuum observing methods needed at stage 2 of continuum commissioning.
Implement acceptance of pointing results from Aips++
100%Thu 1/25/01Thu 2/8/01MediumAips++,GO,Comm,Mock  Although the stage 1 tools will suffice for the first week or two of commissioning, it is of high importance to develop a method that will perform something like the following steps:...
Implement and verify continuum OTF mapping observing script
75%Fri 2/9/01Fri 2/16/01MediumComm,M&C,GO,Mock  Use mockup to test observing script for performing a continuum OTF 2-dimenional map. More details on the parameters and actions of the script will be provided when we have a better feel for what the GBT can accomplish and what we will need.
Implement and verify continuum beam-switching observing script
0%Wed 2/21/01Wed 2/21/01MediumComm,M&C,GO,Mock  Use mockup to test observing script for performing a continuum beam-switched observation. More details on the parameters and actions of the script will be provided when we have a better idea of the design of the Q-band tertiary....
Implement and verify continuum polarization-switching observing script
0%Tue 2/20/01Tue 2/20/01MediumComm,M&C,GO,Mock  Use mockup to test observing script for performing a continuum polarization-switched observation. More details on the parameters and actions of the script will be provided when we have a better idea of the capabilities of various receiver's polarizati...
Continuum observing techniques - General use
0%Fri 6/29/01Mon 7/16/01Low 84 The creation and testing of continuum observing methods not needed for commissioning but required by astronomers. Since these tasks are not needed for commissioning, they have been given a low priority. Priorities will be reassigned when we know that...
Implement and verify continuum on-off observing script
0%Fri 6/29/01Mon 7/2/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a continuum on-off observation. More details on the parameters and actions of the script will be provided at a later time....
Implement and verify continuum 5-point observing script
0%Mon 7/2/01Mon 7/2/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a 5-point continuum pointing observation. More details on the parameters and actions of the script will be provided at a later time....
Implement and verify continuum grid mapping observing script
0%Fri 7/13/01Mon 7/16/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a continuum grid map. More details on the parameters and actions of the script will be provided at a later time....
GBT Observe Ready for stage 1 continuum commissioning
0%Thu 2/15/01Thu 2/15/01Very High 80,64,68,62181Milestone indicating continuum observing scripts are ready for stage 1 commissioning.
GBT Observe Ready for stage 2 continuum commissioning
0%Fri 6/29/01Fri 6/29/01Medium 84,71189,310Milestone indicating continuum observing scripts are ready for stage 2 commissioning.
Spectral line observing techniques
9%Thu 2/22/01Mon 9/24/01Medium  118The creation and testing of spectral-line observing methods mostly residing within "GBT Observe" ...
Line observing techniques - Commissioning
34%Thu 2/22/01Mon 4/30/01Medium  100,107,108The creation and testing of line observing methods needed for commissioning.
Verify line tracking observing script
100%Mon 4/30/01Mon 4/30/01MediumComm,M&C,GO,Mock  Use the mockup to test line observing script for tracking a celestial position.
Implement and verify line position-switching observing script
0%Thu 2/22/01Thu 2/22/01MediumComm,M&C,GO,Mock  Use the mockup to test observing script for performing a line position-switched observation..
Implement and verify line frequency-switching observing script
0%Mon 4/2/01Mon 4/2/01MediumComm,M&C,GO,Mock  Use the mockup to test observing script for performing a line frequency-switched observation..
Line observing techniques -- General use
0%Wed 7/18/01Mon 9/24/01Low 96 The creation and testing of line observing methods not needed for commissioning but required by astronomers. Since these tasks are not needed for commissioning, they have been given a low priority. Priorities will be reassigned when we know that an o...
Implement and verify line beam-switching observing script
0%Wed 7/18/01Wed 7/18/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line beam-switched observation. More details on the parameters and actions of the script will be provided when we have a better idea of the design of the Q-band tertiary....
Implement and verify line polarization-switching observing script
0%Wed 7/18/01Thu 7/19/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line polarization-switched observation. More details on the parameters and actions of the script will be provided when we have a better idea of the capabilities of various receiver's polarization sw...
Implement and verify line cross-scan observing script
0%Thu 7/19/01Fri 7/20/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line cross scan. More details on the parameters and actions of the script will be provided at a later time....
Implement and verify line 5-point observing script
0%Thu 7/19/01Fri 7/20/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line 5-point pointing observation. More details on the parameters and actions of the script will be provided at a later time....
Implement and verify line OTF mapping observing script
0%Thu 9/20/01Fri 9/21/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line OTF 2-dimenional map. More details on the parameters and actions of the script will be provided when we have a better feel for what the GBT can accomplish and what we will need....
Implement and verify line Grid mapping observing script
0%Mon 9/24/01Mon 9/24/01LowComm,M&C,GO,Mock  Use mockup to test observing script for performing a line grid map. More details on the parameters and actions of the script will be provided at a later time....
GBT Observe Ready for line commissioning
0%Mon 4/30/01Mon 4/30/01Medium 96,68,64,62310Milestone indicating line observing scripts are ready for commissioning....
Doppler tracking techniques
0%Tue 5/22/01Thu 5/31/01Medium 96111,118The GBT M&C system Doppler tracking algorithm is still not yet fully established and is being developed. GBT Observe also needs to implement its side of providing input parameters for Doppler tracking....
Implement Doppler tracking algorithm
0%Tue 5/22/01Tue 5/29/01MediumComm,M&C,GO 110Implementation of the M&C and GBT Observe parts of the Doppler tracking algorithm. Commissioners will be involved in the determination of the algorithm.
Verify Doppler tracking on a test CW source
0%Tue 5/29/01Thu 5/31/01MediumComm,Eng,M&C,Mock109 Use mockup to test Doppler tracking algorithms on a CW source in the mockup.
GBT Observe ready for Doppler experiments
0%Thu 5/31/01Thu 5/31/01Medium 108 Milestone indicating line observing scripts implementing Doppler tracking are ready for commissioning.
Holography techniques
0%Fri 2/23/01Mon 2/26/01Medium  114The creation and testing of the observing techniques and scripts for holographic observations.
Implement and verify OTF holographic script
0%Fri 2/23/01Mon 2/26/01MediumComm,M&C,GO,Mock  Implementation of holography observing script and subsequent testing of the script in the mockup....
GBT Observe ready for Holography
0%Mon 2/26/01Mon 2/26/01Medium 112247Milestone indicating line observing scripts are ready for holography observations....
Implement and verify GO I.F./ L.O. routing
0%Wed 5/2/01Wed 5/16/01MediumComm,GO,Mock 118Although not needed for commissioning, for general observers GBT Observe will need to determine how best to set up the L.O. and I.F. system for a particular observation and then set up the switches, synthesizers, and filters for the observation.
Pulsar observing techniques
0%Tue 6/5/01Tue 6/19/01MediumComm,M&C,GO,Mock 118Determine, implement and test pulsar observing techniques and scripts. Subtasks will need to be specified.
VLBI observing techniques
0%Wed 4/4/01Tue 5/1/01MediumComm,M&C,GO,Mock 118Determine, implement and test VLBI observing techniques and scripts. This task might be redundant with the VLB tasks under the Hardware summary task.
GBT Observe ready for general use
0%Mon 9/24/01Mon 9/24/01Medium 95,79,108,115,116,117 Milestone indicating GBT Observe and all expected observing techniques are ready for general use....
Data reduction
15%Tue 1/2/01Tue 9/25/01Medium   These tasks describe what data reduction tools are going to be needed for other commissioning tasks as well as those that will be tested during commissioning but whose users will be the general telescope user....
General data reduction
76%Tue 1/2/01Wed 1/3/01Very High  127,163Data analysis tools that will be the basis behind all needed tools. As such, these tasks are given a high priority since very little commissioning or data reduction development can happen without them.
Implement baseline fitting (polynomial, sinusoid)
100%Tue 1/2/01Tue 1/2/01Very HighAips++  Basic data reduction algorithm for fitting a polynomial and sinusoidal baseline to a 1-dim array of data points, either continuum or line.
Implement Gaussian fitting (single, multi)
100%Tue 1/2/01Tue 1/2/01Very HighAips++  Basic data reduction algorithm for fitting one or more Gaussians to a 1-dim array of data points, either continuum or line....
Implement template fitting
80%Tue 1/2/01Tue 1/2/01Very HighAips++  Basic data reduction algorithm for fitting a template to a 1-dim array of data points, either continuum, line, focus offset, etc....
Implement observations data base
50%Wed 1/3/01Wed 1/3/01Very HighAips++  Since we expect to be taking thousands of observations for various commissioning tasks under various conditions, the access to the data must have a data base that can be queried to determine what observations are of interest for a particular data reduc...
Implement scripting tools
50%Wed 1/3/01Wed 1/3/01Very HighAips++  Basic scripting language for pasting algorithms together. When Aips++'s general tools are not adequate for a task, or have not yet been developed, we will need a medium-power scripting tool for processing a list of observations. The list will probabl...
Continuum data reduction
21%Wed 1/3/01Thu 7/19/01Medium  180Data reduction tools explicitly for continuum data.
Continuum data reduction - Stage 1 commissioning
36%Wed 1/3/01Wed 1/10/01Very High 120149These are the continuum data reduction tasks and algorithms that will be needed early on in commissioning and, therefore, have a very high priority....
Verify Aips++ DCR filler
100%Wed 1/3/01Thu 1/4/01Very HighComm,Aips++,Mock  Verifies that that Aips++ filler still works with the new measurement sets.
Implement multi-purpose continuum plotting tools
0%Thu 1/4/01Wed 1/10/01Very HighAips++,Comm  Basic Continuum routines for plotting a 1-dim continuum observation. The plotting axes can be combinations of any of the following:...
Implement 1-d continuum OTF regridding
0%Thu 1/4/01Fri 1/5/01Very HighAips++,Comm  Basic Continuum routine for regridding 1-dim data onto a user-specified grid.
Implement cross-scan pointing data reduction
100%Tue 1/9/01Wed 1/10/01Very HighAips++,Comm  Basic Continuum routine for reducing a cross-scan pointing observation. The script will assume the following order of observations from GBT Observe:...
Implement 1-d focus-curve fitting
0%Fri 1/5/01Mon 1/8/01Very HighAips++,Comm  Basic Continuum routines for reducing 1-dim focus curves. The algorithm will fit a user-specified focus template to a 1-dim focus measurement of intensity vs. focus offset. The result of the fit should be the focus offset that produces the highest in...
Continuum Data Reduction - Stage 2 Commissioning
31%Mon 1/8/01Wed 1/17/01High   These are the continuum data reduction tasks and algorithms that will be needed very soon after commissioning starts and, therefore, have a high priority....
Implement 2-d focus curve fitting
0%Mon 1/8/01Fri 1/12/01HighAips++,Comm  Continuum routine for fitting a 3-dimensional surface to focus offset measurements. The algorithm will ...
Implement real-time data display and quick reduction
0%Thu 1/11/01Mon 1/15/01HighAips++,Comm  A Aips++ task that will monitor the ongoing observations and provide data display and rudimentary data reduction. ...
Implement all-sky pointing data reduction
80%Thu 1/11/01Wed 1/17/01HighAips++,Comm  Continuum routines that will take the log files produced by the 1-d cross-scan pointing algorithm for multiple observations and feed them to an all-sky fitting routine like TPOINT.
Continuum Data Reduction - Final Commissioning
0%Mon 1/15/01Fri 1/19/01Medium  150These are the continuum data reduction tasks and algorithms that will be needed soon after commissioning starts and which have a medium priority....
Implement Tcal and Tsys data reduction
0%Mon 1/15/01Mon 1/15/01MediumAips++,Comm  Measures Tsys from a continuum observation using the noise diode as a temperature reference (See memo by Maddalena). Determines Tcal from a continuum observation of a continuum calibrator and an assumed efficiency (See 140-ft memo by Maddalena).
Implement atmospheric model fitting
0%Tue 1/16/01Tue 1/16/01MediumAips++,Comm  Fits to a series of Tant taken at a range of elevations the function described by tipper memo (Maddalena).
Implement 2-d continuum regridding
0%Tue 1/16/01Wed 1/17/01MediumAips++,Comm  Continuum routine for regridding 2-dim OTF data onto a user-specified grid....
Implement continuum OTF mapping data reduction
0%Thu 1/18/01Fri 1/19/01MediumAips++,Comm  Continuum routine for reducing a 2-dim OTF data. An example of this would be a beam map.
Implement continuum polarization data reduction
0%Thu 1/18/01Fri 1/19/01MediumAips++,Comm  Continuum polarization routines. More details will be established as we learn the polarization of the GBT and its hardware.
Implement beam-switching data reduction
0%Thu 1/18/01Fri 1/19/01MediumAips++,Comm  Continuum beam-switching routines. More details will be established when the details of the Q-band tertiary are worked out.....
Continuum Data Reduction - General Use
0%Thu 2/22/01Thu 7/19/01Low   Continuum data reduction tools that are not explicitly needed for commissioning (hence, why they have lower priorities the other data reduction tasks), but which the general user will need. Commissioners will verify the validity of these routines at s...
Implement continuum grid mapping data reduction
0%Thu 2/22/01Fri 2/23/01LowAips++,Comm  Continuum routine for reducing a 2-dim grid data set. An example of this would be a beam map.
Implement 5-point continuum pointing data reduction
0%Wed 7/18/01Thu 7/19/01LowAips++,Comm  Continuum routine for reducing a 5-point pointing observation.
Implement On-Off data reduction
0%Wed 7/18/01Thu 7/19/01LowAips++,Comm  Continuum routine for reducing an on-off observation to determine Tant.
Aips++ Ready for Stage 1 Cont. Commissioning
0%Tue 1/2/01Tue 1/2/01Very High  181Milestone for the continuum routines for the first stage of commissioning.
Aips++ Ready for Stage 2 Cont. Commissioning
0%Wed 1/10/01Wed 1/10/01High 127 Milestone for the continuum routines for the second stage of commissioning.
Aips++ Ready for Final Cont. Commissioning
0%Fri 1/19/01Fri 1/19/01Medium 137310,247,269,279Milestone for the continuum routines for the final stage of commissioning.
Holographic Data Reduction
0%Tue 1/23/01Wed 4/4/01Medium  161,180Data reduction tools for holographic data.
Verify Holography Filler
0%Tue 4/3/01Wed 4/4/01MediumComm,Aips++,Mock  Test Aips++ Filler for the holographic backend....
Implement Amp/phase, Re/I'm, Illum/Offset plotting tools
0%Tue 1/23/01Thu 1/25/01MediumAips++,Comm  Basic Holographic routines for plotting 2-dim holographic images of Amplitudes, phases, Illumination, panel error or offsets, and Real and Imaginary arrays.
Implement real-time data display
0%Tue 1/23/01Wed 1/24/01MediumAips++,Comm  Real-time display of a holographic 1-dim strip and for a 2-dim image. Quantities displayed should be relative amplitudes and relative phases.
Implement 2-d Amp/phase holographic regridding
0%Tue 1/23/01Wed 1/24/01MediumAips++,Comm  Holographic routines that regrids OTF data taken on a 2-dim Az/El grid onto a user-specified grid. The commissioners will determine the grid using the physical axis offsets of the GBT.
Implement Step 1 instrumental corrections
0%Thu 1/25/01Mon 1/29/01MediumAips++,Comm  Holographic routine which corrects relative amplitudes and phases in the image plane for reference horn amplitude patterns and mapping phase patterns. See UniPOPS routines for details. See UniPOPS procedures for details.
Implement 2-d IFFT routines
0%Thu 1/25/01Thu 1/25/01MediumAips++,Comm  Converts image plane Amplitude/Phase images to Real/Imaginary and performs 2-dim IFFT. Converts resulting Real/Imaginary aperture plane data into Amplitude/Phase maps. See UniPOPS procedures for details.
Implement Step 2 instrumental corrections
0%Fri 1/26/01Tue 1/30/01MediumAips++,Comm  Corrects aperture plane aperture/illumination maps for signal feed amplitude and phase patterns. See UniPOPS procedures for details.
Implement phase-fitting routine
0%Thu 2/1/01Tue 2/6/01MediumAips++,Comm  Fits a 2-dim surface to the holography phase map for pointing errors, axial focus offsets, and radial/lateral focus offsets. See UniPOPS procedures for details.
Implement actuator offset routine
0%Thu 2/1/01Wed 2/7/01MediumComm,Aips++  Converts a holographic phase map into physical surface offsets and then into actuator offsets. Details will need to be finalized.
Aips++ Ready for Holography Commissioning
0%Wed 4/4/01Wed 4/4/01Medium 151247Milestone for holographic data reduction for commissioning.
Spectral Line Data Reduction
13%Wed 1/17/01Mon 9/24/01Medium  180Data reduction tools explicitly for spectral-line data.
Spectral Line Data Reduction - Commissioning
23%Wed 1/17/01Tue 5/8/01Medium 120179Milestone for the spectral-line routines for commissioning.
Verify Aips++ Spectrometer fillers
0%Tue 4/10/01Fri 4/13/01MediumComm,Aips++,Mock  Verifies that that Aips++ filler works with on Spectrometer data.
Verify Aips++ Spectral Processor filler
75%Sat 5/5/01Tue 5/8/01MediumComm,Aips++,Mock  Verifies that that Aips++ filler works with on Spectral Processor data....
Implement multi-purpose spectral-line plotting tools
0%Fri 2/2/01Fri 2/2/01MediumAips++,Comm  Basic spectral-line routines for plotting a spectrum. The plotting axes can be combinations of any of the following:...
Implement real-time data display
0%Thu 2/22/01Fri 2/23/01MediumAips++,Comm  A Aips++ task that will monitor the ongoing observations and provide data display and rudimentary data reduction. One algorithm might perform Sig-Ref/Ref for frequency-, beam-, or polarization-switched data or On-Off/Off for position-switched data....
Implement 1-d spectral-line regridding
0%Wed 1/17/01Wed 1/17/01MediumAips++  Spectral Lines routine for regridding the frequency or velocity axis onto a user-defined grid....
Implement Position-switching data reduction
0%Mon 1/22/01Mon 1/22/01MediumAips++  Spectral Lines routines for calibrating position-switched data....
Implement Frequency-switching data reduction
0%Mon 1/22/01Mon 1/22/01MediumAips++  Spectral Lines routines for calibrating frequency-switched data....
Implement Beam and Polarization switching data reduction
0%Mon 1/22/01Mon 1/22/01MediumAips++  Spectral Lines routines for calibrating beam- and polarization-switched data....
Implement Doppler-tracking regridding
0%Thu 2/22/01Fri 2/23/01MediumAips++,Comm  Regrids spectral-line data to compensate for Doppler tracking. More details will follow....
Spectral Line Data Reduction-- General Use
0%Wed 7/18/01Mon 9/24/01Low   Spectral-line data reduction tools that are not explicitly needed for commissioning (hence, why they have lower priorities the other data reduction tasks), but which the general user will need. Commissioners will verify the validity of these routines ...
Implement 5-point spectral-line pointing data reduction
0%Wed 7/18/01Wed 7/18/01LowAips++,Comm  Spectral Lines routine for reducing 5-point pointing data. See 12-m data reduction tools in UniPOPS for details.
Implement 3-d spectral-line regridding
0%Thu 7/19/01Mon 7/23/01LowAips++,Comm  Spectral Lines routine for regridding data onto a user-defined position and frequency/velocity grid.
Implement spectral-line grid mapping data reduction
0%Fri 7/20/01Thu 7/26/01LowAips++,Comm  Spectral Lines routine for turning a spectral-line grid-mapped data set into a data cube.
Implement spectral-line OTF mapping data reduction
0%Fri 7/20/01Thu 7/26/01LowAips++,Comm  Spectral Lines routine for turning a spectral-line OTF-mapped data set into a data cube.
Implement polarization data reduction
0%Tue 9/18/01Mon 9/24/01LowAips++,Comm  Spectral-line polarization routines. More details will be established as we learn the polarization of the GBT and its hardware....
Aips++ Ready for Line Commissioning
0%Tue 5/8/01Tue 5/8/01Medium 163310Milestone for the spectral-line routines needed for commissioning.
Aips++ Ready for General Use
0%Tue 9/25/01Tue 9/25/01Low 126,151,162 Milestone for all data reduction techniques.
Focus tracking
30%Thu 2/15/01Thu 11/1/01Medium 11,93,148 Determination of the focus tracking of the telescope. These tasks include:...
Prime Focus focus tracking
66%Mon 2/26/01Mon 7/9/01Medium  188Astronomical measurements from prime focus at 800 MHz to determine focus coefficients and plate scale. This includes testing the stability of the prime focus mount. ...
Servo - Prime Focus
0%Wed 7/4/01Sat 7/7/01MediumComm,GBT,Eng 184Hardware tests of servo system. The steps involved are:...
Astronomical measurements - PF focus tracking
94%Mon 2/26/01Mon 7/9/01Medium 183 Astronomical measurements from prime focus to determine focus coefficients and plate scale.
Measure plate scale
80%Mon 2/26/01Mon 7/9/01Medium   Measurement of the prime focus plate scale. A series of pointing observations with the focus adjusted laterally between observations.
Measure PF focus Track
100%Wed 2/28/01Mon 3/5/01MediumComm,GBT 187Astronomical pointing observations at prime focus to determine focus coefficients as a function of elevation. The observing scheme is:...
Determine astronomically PF Xt(El), Y(El)
80%Thu 3/8/01Mon 7/9/01MediumComm186 Data reduction of the focus/pointing data to determine best gain lateral and axial focus position as a function of telescope elevation.
PF Focus track ready
0%Mon 7/9/01Mon 7/9/01Medium 182218Milestone on the completion of PF focus determination.
Low frequency (1.4 GHz) Greg. Focus tracking
100%Mon 7/23/01Fri 8/3/01Medium 94195,198Astronomical measurements from Gregorian focus at 1.4 GHz to determine focus coefficients and plate scale. This includes testing the stability of the secondary mount and turret. ...
Servo - actuator/turret low freq.
100%Mon 7/23/01Thu 7/26/01MediumComm,GBT,Eng 191Hardware tests of servo system. The steps involved are:...
Astronomical measurements - low freq. Greg. focus tracking
100%Thu 7/26/01Fri 8/3/01Medium 190 Astronomical measurements from Gregorian focus at 1.4 GHz to determine focus coefficients and plate scale.
Measure low-freq. Greg. plate scale
100%Tue 7/31/01Wed 8/1/01MediumComm,GBT  Measurement of the prime focus plate scale. A series of pointing observations with the focus adjusted laterally between observations....
Measure low-freq. Greg. focus track
100%Thu 7/26/01Tue 7/31/01MediumComm,GBT 194Astronomical pointing observations at Gregorian focus to determine focus coefficients as a function of elevation. The observing scheme is:...
Determine low-freq. Greg. Xt(El), Y(El)
100%Wed 8/1/01Fri 8/3/01MediumComm193 Data reduction of the focus/pointing data to determine best gain lateral and axial focus position as a function of telescope elevation....
Preliminary Greg. Focus tracking ready
100%Fri 8/3/01Fri 8/3/01Medium 189225,247Milestone in Gregorian focusing. Telescope can now be focused up to 12 GHz.
Metrology determination of Greg. Xt(El,temp), Y(El,temp)
0%Thu 2/15/01Fri 3/16/01Very HighMet,GBT 198Metrology determination of focus coefficients for high frequency observing. More details will follow.
Finite element analysis of Greg. Xt(El,temp), Y(El,temp)
0%Thu 2/15/01Fri 3/16/01HighWells/Schwab 198Finite element analysis of focus as a function of telescope elevation and temperature.
High frequency (12 GHz) Greg. focus tracking
0%Mon 8/6/01Thu 11/1/01Medium 189,197,196207Astronomical measurements from Gregorian focus at 12 GHz to determine focus coefficients and plate scale. This includes testing the stability of the secondary mount and turret. ...
Servo - actuator/turret High Freq.
0%Mon 8/6/01Thu 8/9/01MediumComm,GBT,Eng 200Hardware tests of servo system. The steps involved are:...
Astronomical measurements - high freq. Greg focus tracking
0%Sun 8/12/01Thu 11/1/01Medium 199 Astronomical measurements from Gregorian focus at 12 GHz to determine focus coefficients and plate scale.
Measure high-freq. Greg. plate scale
0%Sun 8/12/01Mon 8/13/01MediumComm,GBT  Measurement of the prime focus plate scale. A series of pointing observations with the focus adjusted laterally between observations....
Measure high freq. Greg focus track
0%Fri 10/26/01Mon 10/29/01MediumComm,GBT,HiFreq 203Astronomical pointing observations at Gregorian focus to determine focus coefficients as a function of elevation. The observing scheme is:...
Determine high-freq. Greg. Xt(El), Y(El), and Zt(El)
0%Tue 10/30/01Thu 11/1/01MediumComm202 Data reduction of the focus/pointing data to determine best gain lateral and axial focus position as a function of telescope elevation....
Determine Greg. Holography Xt(El). Y(El), and Zt(El)
0%Wed 10/24/01Fri 10/26/01MediumComm247 Data reduction of the holographic data to determine focus offsets as a function of telescope elevation.
Synthesize focus determinations from all methods
0%Mon 8/6/01Wed 8/8/01MediumComm,Wells/Schwab  Combining the results from holography, metrology, finite element analysis, and astronomical measurements into a single set of focus coefficients.
Verification of high-freq. Greg. focus coefficients
0%Mon 8/13/01Fri 8/17/01MediumComm,GBT,Wells/Schwab  Astronomical pointing observations at Gregorian focus to determine focus coefficients as a function of elevation. The observing scheme is:...
High Frequency Greg. focus tracking ready
0%Thu 11/1/01Thu 11/1/01Medium 198233Milestone in Gregorian focusing. Telescope can now be focused up to 50 GHz under conditions implied by the previous tasks....
Pointing
32%Thu 2/1/01Fri 11/23/01Medium   Measurements that deal with the pointing of the GBT. These tasks include:...
Telescope servo
75%Thu 2/1/01Mon 2/5/01High  212,218Hardware servo tests whose goal is to determine telescope move times under a wide range of conditions.
Determine telescope acceleration
75%Thu 2/1/01Sat 2/3/01HighComm,GBT,Eng  Hardware tests of servo system to determine acceleration rates that are practical for observations....
Determine settling time
75%Sat 2/3/01Mon 2/5/01HighComm,GBT,Eng  Hardware tests of servo system to determine settling time for the antenna from various velocities and offsets....
Optical pointing system
0%Mon 3/12/01Tue 7/3/01High 209,15217Using the optical pointing telescope to help determine many of the telescope pointing terms.
Measure optical tracking stability
0%Thu 3/22/01Sat 3/24/01HighComm,GBT  Pointing observation with the optical telescope of a star to determine stability under wind and temperature changes.
Observations of stars
0%Mon 3/12/01Mon 3/26/01HighComm,GBT 215Pointing observation with the optical telescope toward multiple stars distributed across the sky.
Determine optical All-sky coefficients
0%Mon 3/26/01Mon 4/2/01HighComm214216Data reduction of the all-sky optical data to determine pointing coefficients.
Determine Optical/Radio offsets
0%Mon 4/2/01Tue 7/3/01HighComm,GBT215 Astronomical pointing observations toward a source like 3C274 or the edge of the moon to determine the optical/radio axes offsets and how the offsets change with elevation.
Optical Pointing Complete
0%Tue 7/3/01Tue 7/3/01High 212233Milestone in determining pointing coefficients using the optical telescope.
Prime focus pointing
46%Tue 7/17/01Fri 8/17/01Medium 188,209224,225Pointing determination from prime focus. This includes testing the stability of the prime focus mount and the determination of pointing coefficients.
Measure PF tracking stability
80%Tue 7/17/01Wed 7/18/01MediumComm,GBT 220Flux measurements of a source positioned at the half-power point of the telescope's beam. Any fluctuation in the observed flux is a measure of the pointing stability
Measure PF short-term stability
80%Wed 7/18/01Thu 7/19/01MediumComm,GBT219221Pointing observation of the same source repeated over and over again. This should measure the short-term stability of the GBT's pointing from Prime Focus.
Perform PF all-sky map
50%Wed 8/1/01Mon 8/6/01MediumComm,GBT220222Astronomical pointing observations at 800 MHz of sources scattered across the sky. The distribution of sources will be chosen so as to maximize the benefit to fitting the data to the pointing model.
Determine PF all-sky coefficients
50%Thu 8/9/01Wed 8/15/01MediumComm221223Data reduction of the all-sky PF data to determine all-sky pointing coefficients.
Verify PF all-sky coefficients
0%Wed 8/15/01Fri 8/17/01MediumComm,GBT222 Astronomical pointing observations at 800 MHz of sources scattered across the sky after applying the newly determined pointing coefficients. This should verify that the PF pointing model is appropriate.
PF Pointing complete
0%Fri 8/17/01Fri 8/17/01Medium 218 Milestone on the completion of PF pointing determination.
Low frequency (1.4 GHz) Greg pointing
100%Fri 8/17/01Tue 9/4/01Medium 195,218231,233Pointing determination from Gregorian focus using a low-frequency receiver. This includes testing the stability of the subreflector and turret and the determination of pointing coefficients. ...
Measure Greg. low freq. tracking stability
100%Fri 8/17/01Mon 8/20/01MediumComm,GBT 227Flux measurements of a source positioned at the half-power point of the telescope's beam. Any fluctuation in the observed flux is a measure of the pointing stability
Measure Greg low freq. short-term stability
100%Mon 8/20/01Tue 8/21/01MediumComm,GBT226228Pointing observation of the same source repeated over and over again. This should measure the short-term stability of the GBT's pointing from Gregorian system....
Perform Greg low freq. all-sky map
100%Tue 8/21/01Sun 8/26/01MediumComm,GBT227229Astronomical pointing observations at 1.4 GHz of sources scattered across the sky. The distribution of sources will be chosen so as to maximize the benefit to fitting the data to the pointing model....
Determine Greg low freq. all-sky coefficients
100%Mon 8/27/01Fri 8/31/01MediumComm228230Data reduction of the all-sky low-frequency Gregorian data to determine all-sky pointing coefficients.
Verify Greg low freq. all-sky coefficients
100%Sat 9/1/01Tue 9/4/01MediumComm,GBT229 Astronomical pointing observations at 1.4 GHz of sources scattered across the sky after applying the newly determined pointing coefficients. This should verify that the Gregorian pointing model is appropriate....
Preliminary Gregorian pointing complete
100%Wed 9/5/01Wed 9/5/01Medium 225247,265,243Milestone in Gregorian pointing. Telescope can now be used up to 12 GHz.
Metrology determination of pointing coefficients
0%Sat 7/7/01Fri 8/3/01MediumMet,GBT 233Metrology determination of pointing coefficients for high frequency observing. More details will follow.
High frequency (12 GHz) Greg pointing
0%Thu 11/1/01Fri 11/23/01Medium 207,225,217,232239Pointing determination from Gregorian focus using a medium/high-frequency receiver. This includes testing the stability of the subreflector and turret and the determination of pointing coefficients. ...
Measure Greg high freq. tracking stability
0%Thu 11/1/01Fri 11/2/01MediumComm,GBT 235Flux measurements of a source positioned at the half-power point of the telescope's beam. Any fluctuation in the observed flux is a measure of the pointing stability
Measure Greg high freq. short-term stability
0%Sat 11/3/01Mon 11/5/01MediumComm,GBT234236Pointing observation of the same source repeated over and over again. This should measure the short-term stability of the GBT's pointing from Gregorian system....
Perform Greg high freq. all-sky map
0%Fri 11/16/01Mon 11/19/01MediumComm,GBT,HiFreq235237Astronomical pointing observations at 12 GHz of sources scattered across the sky. The distribution of sources will be chosen so as to maximize the benefit to fitting the data to the pointing model....
Determine Greg high freq. all-sky coefficients
0%Mon 11/19/01Thu 11/22/01MediumComm236238Data reduction of the all-sky high-frequency Gregorian data to determine all-sky pointing coefficients.
Verify Greg high freq. all-sky coefficients
0%Thu 11/22/01Fri 11/23/01MediumComm,GBT,HiFreq237 Astronomical pointing observations at 12 GHz of sources scattered across the sky after applying the newly determined pointing coefficients. This should verify that the Gregorian pointing model is appropriate....
Gregorian high frequency pointing complete
0%Fri 11/23/01Fri 11/23/01Medium 233 Milestone in Gregorian pointing. Telescope can now be used up to 50 GHz under conditions implied by the previous tasks.
Surface
4%Tue 1/2/01Sun 5/5/02Medium   Tasks for adjusting the surface setting of the GBT for up to 50 GHz observing. The major techniques we will use include:...
Photogrammetry
24%Thu 1/25/01Fri 9/21/01High  246Uses the existing photogrammetry data to alter the actuator settings to their best-fit values.
Determine actuator motions from photogrammetry map
80%Thu 1/25/01Wed 1/31/01HighComm,Wells/Schwab 243Data reduction of the existing photogrammetry map to determine actuator offsets that would produce the best-fit dish....
Measure 12 GHz photogrammetry efficiency pre- measurements
0%Wed 9/5/01Mon 9/17/01HighComm,GBT,HiFreq242,231244Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are prior to adjusting the surface using the photogrammetry results. This step might be skipped if there already exists a co...
Prepare for and move actuators according to photogrammetry results
0%Tue 9/18/01Thu 9/20/01MediumComm,Wells/Schwab,Eng,M&C243245Engineering and programming tasks to prepare for moving the surface actuators and the actual moving of the actuators.
Measure 12-GHz photogrammetry efficiency improvement
0%Thu 9/20/01Fri 9/21/01HighComm,GBT,HiFreq244 Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are after the adjustment of the surface using the photogrammetry results and will measure the improvements from moving the ac...
1st surface setting
0%Fri 9/21/01Fri 9/21/01High 241 Milestone for the first surface setting of the GBT. This should provide a near 12-GHz telescope.
Surface - Gregorian holography
0%Mon 9/17/01Tue 10/23/01Medium 114,161,195,231,38,150204,256,263,268Measures the primary plus secondary surfaces using holography from the secondary focus....
Measure Hol Greg. pointing collimation
0%Mon 9/17/01Mon 9/17/01MediumComm,GBT,HiFreq 249Continuum pointing observations toward multiple source at different elevations to determine the three collimation terms in the pointing equation for this receiver.
Determine Hol. Greg. axial focus curve
0%Mon 9/17/01Tue 9/18/01MediumComm,GBT,HiFreq248250Continuum pointing observations at multiple focus positions to determine the best position of the optics.
Measure Hol. Greg. phase stability on calibrator
0%Tue 9/18/01Tue 9/18/01MediumComm,GBT,HiFreq249251Measurements toward 12 GHz geostationary satellites and astronomical methanol masers to determine the phase stability of the holographic system and to estimate the expected accuracy of a holographic map.
Make Greg. high-resolution map near rigging angle
0%Fri 9/21/01Mon 10/1/01MediumComm,GBT,HiFreq250252Holographic observations of a 12 GHz geostationary satellite positioned near the rigging angle. This is to provide a high resolution map pf the combined primary/secondary surfaces.
Make Greg. Low-resolution maps at various El
0%Mon 10/1/01Thu 10/11/01MediumComm,GBT,HiFreq251253Holographic observations of strong 12 GHz methanol masers at a range of elevations. This is to provide low resolution maps of the combined primary/secondary surfaces as a function of elevation for determining gravitational deformations.. ...
Measure Greg 12 GHz Holog efficiency pre- measurements
0%Thu 10/11/01Fri 10/12/01MediumComm,GBT,HiFreq252254Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are prior to adjusting the surface using the Gregorian holography results. This step might be skipped if there already exist...
Determine actuator motions from holographic map
0%Tue 10/16/01Mon 10/22/01MediumComm253255Using the low and high resolution holographic maps, determine the amount an actuator will need to be moved to produce a better surface.
Measure Greg 12-GHz Holog efficiency improvement
0%Mon 10/22/01Tue 10/23/01MediumComm,GBT,HiFreq254 Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are after the adjustment of the surface using the Gregorian holographic results and will measure the improvements from moving...
Surface - Prime Focus holography
0%Fri 10/26/01Sun 5/5/02Lowest 247 Measures the primary surface using holography from the prime focus. These tasks might be skipped if we deem in not necessary to know what the primary and secondary surfaces are each doing as opposed to what their combination is doing (as measured by G...
Measure Hol PF pointing collimation
0%Mon 4/22/02Mon 4/22/02LowestComm,GBT,HiFreq 258Continuum pointing observations toward multiple source at different elevations to determine the three collimation terms in the pointing equation for this receiver....
Determine Hol PF axial focus curve
0%Wed 4/24/02Wed 4/24/02LowestComm,GBT,HiFreq257259Continuum pointing observations at multiple focus positions to determine the best position of the optics.
Measure Hol PF phase stability on calibrator
0%Wed 4/24/02Thu 4/25/02LowestComm,GBT,HiFreq258260Measurements toward 12 GHz geostationary satellites and astronomical methanol masers to determine the phase stability of the holographic system and to estimate the expected accuracy of a holographic map. Possibly this step can be avoided if the Gregor...
Make PF High-resolution map near rigging angle
0%Thu 4/25/02Tue 4/30/02LowestComm,GBT,HiFreq259261Holographic observations of a 12 GHz geostationary satellite positioned near the rigging angle. This is to provide a high resolution map pf the combined primary/secondary surfaces. ...
Make PF Low-resolution maps at various El
0%Tue 4/30/02Sun 5/5/02LowestComm,GBT,HiFreq260 Holographic observations of strong 12 GHz methanol masers at a range of elevations. This is to provide low resolution maps of the combined primary/secondary surfaces as a function of elevation for determining gravitational deformations..
Determine whether or not to use Prime Focus maps for surface setting
0%Fri 10/26/01Thu 11/1/01MediumComm  Using the low and high resolution prime focus holographic maps, determine whether or not it would be advantageous to adjust the primary and secondary for their individual errors instead if adjusting the primary for their combined errors.
2nd surface setting
0%Wed 10/24/01Wed 10/24/01Medium 247340,397,412Milestone for the first surface setting of the GBT. This should provide a near 50-GHz telescope.
Finite element analysis
0%Tue 1/2/01Tue 10/16/01Medium  268Finite element analysis of the dish as a function of telescope elevation and temperature.
Measure PF 12 GHz FE efficiency pre-measurements
0%Fri 10/12/01Mon 10/15/01MediumComm,GBT,HiFreq266,231267Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are prior to adjusting the surface using the finite element analysis results. This step might be skipped if there already ex...
Determine surface(El,temp) and actuators(El,temp)
0%Tue 1/2/01Mon 1/15/01MediumWells/Schwab 265,267Computer modeling of the telescope to determine the affects of elevation and temperature on the telescope's surfaces. Then, determining how one should move the actuators to correct the surface.
Measure PF 12-GHz FE efficiency improvement
0%Mon 10/15/01Tue 10/16/01MediumComm,GBT,HiFreq265,266 Astronomical pointing observations at 12 GHz to determine aperture efficiency as a function of elevation. These measurements are after the adjustment of the surface using the finite element analysis results and will measure the improvements from movi...
Final Surface setting
0%Tue 10/23/01Tue 10/23/01Medium 247,264269,275,279,354,425Milestone for the first surface setting of the GBT. This should provide a 50-GHz telescope and an efficiency curve that is flat with elevation..
Aperture/beam efficiency (f)
12%Tue 10/23/01Thu 11/22/01Medium 268,150 Astronomical pointing observations at a set of frequencies to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape. Assumption is that from Gregorian focus, ...
Measure 8-10 GHz efficiencies
0%Tue 10/23/01Thu 10/25/01MediumComm,GBT  Astronomical pointing observations at 8-10 GHz to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape....
Measure 12-18 GHz efficiencies
0%Mon 10/29/01Tue 10/30/01MediumComm,GBT,HiFreq  Astronomical pointing observations at 12-18 GHz to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape....
Measure 18-26 GHz efficiencies
0%Fri 11/2/01Mon 11/5/01MediumComm,GBT,HiFreq  Astronomical pointing observations at 18-26 GHz to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape....
Measure 40-52 GHz efficiencies
0%Mon 11/19/01Thu 11/22/01MediumComm,GBT,HiFreq50 Astronomical pointing observations at 40-52 GHz to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape....
Measure 0.3 - 8 GHz efficiencies
20%Tue 11/6/01Fri 11/16/01MediumComm,GBT59 Astronomical pointing observations at 300-800 MHz to determine aperture efficiency as a function of elevation. Then, beam maps as a function of elevation to determine beam efficiency and beam shape....
Scattering
0%Fri 11/23/01Tue 11/27/01Medium 268 Cross scans using the moon as a knife edge . The amount of power and extent of the plateau under these observations can be used to measure the fraction of the surface with small-scale errors and the size scale for these errors.
Measure scattering pattern - 12 GHz
0%Fri 11/23/01Mon 11/26/01MediumComm,GBT,HiFreq  Cross scans using the moon as a knife edge at 12 GHz . The amount of power and extent of the plateau under these observations can be used to measure the fraction of the surface with small-scale errors and the size scale for these errors....
Measure scattering pattern - 26 GHz
0%Sat 11/24/01Mon 11/26/01MediumComm,GBT,HiFreq  Cross scans using the moon as a knife edge at 26 GHz . The amount of power and extent of the plateau under these observations can be used to measure the fraction of the surface with small-scale errors and the size scale for these errors....
Measure scattering pattern - 50 GHz
0%Mon 11/26/01Tue 11/27/01MediumComm,GBT,HiFreq50 Cross scans using the moon as a knife edge at 50 GHz . The amount of power and extent of the plateau under these observations can be used to measure the fraction of the surface with small-scale errors and the size scale for these errors....
Outer sidelobes
0%Tue 11/27/01Thu 12/13/01Medium 268,150 Near all-sky beam map using the sun as a source to determine outer sidelobes and the large scale surface errors. Measurements need to be made from both prime focus and Gregorian focus due to the differences introduced by the secondary optics. A coupl...
Measure 800 MHz outer sidelobes
0%Tue 11/27/01Tue 12/4/01MediumComm,GBT  Near all-sky beam map at 800 MHz using the sun as a source to determine outer sidelobes and the large scale surface errors.
Measure 1 GHz outer sidelobes
0%Sun 12/2/01Fri 12/7/01MediumComm,GBT  Near all-sky beam map at 1 GHz using the sun as a source to determine outer sidelobes and the large scale surface errors. ...
Measure 12 GHz outer sidelobes
0%Sat 12/8/01Thu 12/13/01MediumComm,GBT,HiFreq  Near all-sky beam map at 12 GHz using the sun as a source to determine outer sidelobes and the large scale surface errors. ...
Astronomical Demonstrations
24%Thu 3/8/01Thu 2/21/02Medium   End-to-end tests confirming readiness of techniques and hardware. Each task demonstrates a particular aspect or type of astronomical observing. These are tasks that require the completion of a large number of predecessor tasks and use a significant f...
Continuum system integration
57%Thu 7/19/01Tue 9/11/01Medium   Tests that show the integration of a large subset of continuum hardware and software.
Measure Prime Focus spillover(El)
0%Thu 7/19/01Tue 7/24/01MediumComm,GBT  Determine spillover as a function of elevation from measured Tsys from a prime focus tipping observation.
Measure Gregorian spillover(El)
75%Sun 8/26/01Thu 8/30/01MediumComm,GBT  Determine spillover as a function of elevation from measured Tsys from a low-frequency, Gregorian tipping observation.
Demonstrate Continuum OTF mapping
100%Sat 9/8/01Tue 9/11/01MediumComm,GBT  A demonstration of an OTF continuum map of a complicated region.
Spectral-Lies system integration
40%Thu 3/8/01Wed 6/20/01Medium   Tests that show the integration of a large subset of spectral-line hardware and software.
Spoilers & baselines
45%Thu 3/8/01Thu 6/7/01Medium   Tests that measure baseline shapes prior and after the installation of antenna spoilers. Requires prime focus and Gregorian receivers and the mockup. Does not require moving the antenna.
Measure baselines pre spoiler installation
100%Thu 5/10/01Wed 5/16/01MediumComm,Mock  Spectral-line tests of baseline shapes prior to the installation of spoilers.
Install spoilers
0%Thu 3/8/01Fri 3/9/01MediumEng,GBT  Installation of antenna spoilers.
Measure baselines post spoiler installation
0%Wed 5/16/01Mon 5/21/01MediumComm,Mock  Spectral-line tests of baseline shapes after the installation of spoilers.
Measure baseline shapes -- Day vs. Night
50%Sun 6/3/01Thu 6/7/01MediumComm,Mock  Baseline shapes after spoiler installation. Long integrations that will measure baseline shape at night versus during the day.
Examine I.F. bandpass for birdies
0%Wed 6/13/01Tue 6/19/01MediumComm,Mock  Spectral-line checks looking for internally-generated birdies. Requires a broad-band source and mockup but not the antenna.
Measure RFI 300 MHz - 5 GHz
50%Sat 6/9/01Wed 6/20/01MediumComm,Mock  Spectral-line checks looking for internally-generated birdies. Requires prime focus, L-band, and C-band receivers and mockup but the antenna need not be moved....
Spectral Line Demonstration
0%Sat 8/18/01Fri 9/14/01Medium   Demonstration of the spectral-line capabilities of the GBT.
Demonstrate line sensitivity - Strong and weak spectral lines
0%Sat 8/18/01Tue 8/21/01MediumComm,GBT  Demonstration of the ability to provide well-calibrated data for both weak and strong narrow spectral lines. Also will determine how well the GBT adheres to the radiometer equation.
Demonstrate wide-weak spectral line sensitivity
0%Mon 9/10/01Wed 9/12/01MediumComm,GBT  Demonstrates the ability to detect wide, weak spectral lines in the absence of the standing waves which plague most telescopes.
Demonstrate spectral line OTF mapping
0%Thu 8/30/01Thu 9/6/01MediumComm,GBT  End-to-end tests of the ability to make OTF spectral-line maps of a complicated region.
Demonstrate spectral lines with the Spectral Processor in RFI environment
0%Wed 9/12/01Fri 9/14/01MediumComm,GBT  Demonstration of the ability of the Spectral Processor to detect lines in a high RFI environment.
VLBI/VLA Demonstration
0%Thu 9/13/01Mon 2/18/02Medium   Demonstration of the VLB capabilities of the GBT.
Measure Green Bank ties
0%Thu 9/13/01Fri 9/14/01MediumComm,GBT  Determines the position of the GBT feed with respect to the other Green Bank telescopes.
Demonstrate control of GBT for VLBA
0%Sat 10/13/01Tue 10/16/01MediumComm,GBT  Demonstrates the ability to convert a SCHED file into something the GBT can properly run.
Demonstrate S2 VLB recording
0%Thu 2/14/02Fri 2/15/02LowComm,GBT  Uses the S2 recording system for VLBA.
Demonstrate VLB dual-recording capabilities
0%Fri 2/15/02Mon 2/18/02LowComm,GBT  Uses the two VLB recorders with the GBT for wide-bandwidth observing.
Demonstration of zero-space flux measurements for VLA data
0%Fri 12/14/01Thu 12/20/01MediumComm,GBT  Uses the GBT and the VLA to provide high fidelity images over wide fields.
Pulsar Demonstration
0%Tue 10/16/01Thu 2/21/02Medium   Demonstration of the pulsar capabilities of the GBT.
Demonstrate pulsar observing using the Spectrometer
0%Tue 10/16/01Mon 10/22/01MediumComm,GBT  Demonstration of the pulsar capabilities of the GBT using the Spectrometer.
Demonstrate pulsar observing using the Spectral Processor
0%Mon 2/18/02Thu 2/21/02LowComm,GBT  Demonstration of the pulsar capabilities of the GBT using the Spectral Processor.
Receivers
6%Tue 7/3/01Wed 4/17/02Medium 28,107,179,150,94 Receiver commissioning concentrates on critical aspects of a receiver and is independent of any telescope commissioning task. The typical tasks are:...
800 MHz PF
19%Tue 7/3/01Mon 1/14/02Medium  324Commissioning of the 800 MHz section of the PF 1 receiver.
800 MHz pointing/focusing
0%Tue 7/3/01Tue 12/18/01Medium  316Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization).
Determine 800 MHz axial focus curve (f,pol)
0%Tue 7/3/01Thu 7/5/01MediumComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency.
Measure 800 MHz collimation
0%Sun 12/16/01Tue 12/18/01MediumComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 800 MHz polarization-switching blanking
0%Thu 10/25/01Fri 10/26/01MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
800 MHz calibration observations
21%Tue 12/18/01Thu 1/3/02Medium 312322Observations with the GBT for receiver commissioning.
Observe 800 MHz gain calibrators(f,pol)
0%Tue 12/18/01Fri 12/21/01MediumComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 800 MHz inner beam maps(f,pol)
50%Thu 12/27/01Mon 12/31/01MediumComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization.
Measure 800 MHz bandpass(f.pol) and baselines(f,pol)
0%Fri 12/21/01Wed 12/26/01MediumComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 800 MHz beam squint(f)
80%Tue 1/1/02Thu 1/3/02MediumComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint.
Determine 800 MHz polarization hybrid settings(f)
0%Mon 12/24/01Wed 12/26/01MediumComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency.
800 MHz calibration data reduction
50%Mon 1/7/02Mon 1/14/02Medium 316 Data reduction of the gain calibration observations
Determine 800 MHz Tcal(f,pol) and Tsys(f,pol)
50%Mon 1/7/02Mon 1/14/02MediumComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sources.
PF 800 MHz ready for experiments
0%Mon 1/14/02Mon 1/14/02Medium 311453Milestone indicating that the 800 MHz PF receiver is ready for general use....
1-2 GHz
0%Thu 12/13/01Thu 1/17/02Medium  339Commissioning of the 1-2 GHz receiver.
1-2 GHz pointing/focusing
0%Thu 12/13/01Tue 1/1/02Medium  330Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 1-2 GHz axial focus curve (f,pol)
0%Sat 12/29/01Mon 12/31/01MediumComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 1-2 GHz MHz collimation
0%Thu 12/13/01Fri 12/14/01MediumComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 1-2 GHz polarization-switching blanking
0%Mon 12/31/01Tue 1/1/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
1-2 GHz calibration observations
0%Thu 1/3/02Sat 1/12/02Medium 326336Observations with the GBT for receiver commissioning.
Observe 1-2 GHz gain calibrators(f,pol)
0%Thu 1/3/02Mon 1/7/02MediumComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 1-2 GHz inner beam maps(f,pol)
0%Sat 1/5/02Mon 1/7/02MediumComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 1-2 GHz bandpass(f.pol) and baselines(f,pol)
0%Tue 1/8/02Thu 1/10/02MediumComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 1-2 GHz beam squint(f)
0%Thu 1/10/02Fri 1/11/02MediumComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
Determine 1-2 GHz polarization hybrid settings(f)
0%Fri 1/11/02Sat 1/12/02MediumComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency....
1-2 GHz calibration data reduction
0%Mon 1/14/02Thu 1/17/02Medium 330 Data reduction of the gain calibration observations
Determine 1-2 GHz Tcal(f,pol) and Tsys(f,pol)
0%Mon 1/14/02Wed 1/16/02MediumComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 1-2 GHz atmospheric Tau(f)
0%Mon 1/14/02Thu 1/17/02MediumComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass.
1-2 GHz ready for experiments
0%Thu 1/17/02Thu 1/17/02Medium 325453Milestone indicating that the 1-2 GHz receiver is ready for general use....
12-18 GHz
0%Fri 12/7/01Thu 1/24/02Medium 263353Commissioning of the 12-18 GHz receiver.
12-18 GHz pointing/focusing
0%Fri 12/7/01Sat 1/19/02Medium  345Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 12-18 GHz axial focus curve (f,pol)
0%Thu 1/17/02Fri 1/18/02MediumComm,GBT,Eng,HiFreq  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 12-18 GHz MHz collimation
0%Fri 1/18/02Sat 1/19/02MediumComm,GBT,Eng,HiFreq  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 12-18 GHz beam-switching blanking
0%Fri 12/7/01Mon 12/10/01MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
12-18 GHz calibration observations
0%Sat 1/19/02Thu 1/24/02Medium 341350Observations with the GBT for receiver commissioning.
Observe 12-18 GHz gain calibrators(f,pol)
0%Sat 1/19/02Mon 1/21/02MediumComm,GBT,Eng,HiFreq  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 12-18 GHz inner beam maps(f,pol)
0%Sun 1/20/02Mon 1/21/02MediumComm,GBT,Eng,HiFreq  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 12-18 GHz bandpass(f.pol) and baselines(f,pol)
0%Tue 1/22/02Wed 1/23/02MediumComm,GBT,Eng,HiFreq  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 12-18 GHz beam squint(f)
0%Wed 1/23/02Thu 1/24/02MediumComm,GBT,Eng,HiFreq  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
12-18 GHz calibration data reduction
0%Thu 1/24/02Thu 1/24/02Medium 345 Data reduction of the gain calibration observations
Determine 12-18 GHz Tcal(f,pol) and Tsys(f,pol)
0%Thu 1/24/02Thu 1/24/02MediumComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 12-18 GHz atmospheric Tau(f)
0%Thu 1/24/02Thu 1/24/02MediumComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
12-18 GHz ready for experiments
0%Thu 1/24/02Thu 1/24/02Medium 340453Milestone indicating that the 12-18 GHz receiver is ready for general use....
40-52 GHz
0%Fri 1/25/02Mon 2/11/02Medium 54,268367Commissioning of the 40-52 GHz receiver.
40-52 GHz pointing/focusing
0%Fri 1/25/02Wed 1/30/02Medium  359Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 40-52 GHz axial focus curve (f,pol)
0%Fri 1/25/02Sun 1/27/02MediumComm,GBT,Eng,HiFreq  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 40-52 GHz MHz collimation
0%Sun 1/27/02Mon 1/28/02MediumComm,GBT,Eng,HiFreq  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 40-52 GHz beam-switching/tertiary blanking
0%Mon 1/28/02Wed 1/30/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
40-52 GHz calibration observations
0%Thu 1/31/02Fri 2/8/02Medium 355364Observations with the GBT for receiver commissioning.
Observe 40-52 GHz gain calibrators(f,pol)
0%Thu 1/31/02Sun 2/3/02MediumComm,GBT,Eng,HiFreq  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 40-52 GHz inner beam maps(f,pol)
0%Sun 2/3/02Tue 2/5/02MediumComm,GBT,Eng,HiFreq  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 40-52 GHz bandpass(f.pol) and baselines(f,pol)
0%Tue 2/5/02Thu 2/7/02MediumComm,GBT,Eng,HiFreq  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 40-52 GHz beam squint(f)
0%Thu 2/7/02Fri 2/8/02MediumComm,GBT,Eng,HiFreq  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
40-52 GHz calibration data reduction
0%Fri 2/8/02Mon 2/11/02Medium 359 Data reduction of the gain calibration observations
Determine 40-52 GHz Tcal(f,pol) and Tsys(f,pol)
0%Fri 2/8/02Mon 2/11/02MediumComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 40-52 GHz atmospheric Tau(f)
0%Fri 2/8/02Mon 2/11/02MediumComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
40-52 GHz ready for experiments
0%Mon 2/11/02Mon 2/11/02Medium 354453Milestone indicating that the 40-52 GHz receiver is ready for general use....
300 MHz PF
0%Tue 1/29/02Thu 2/28/02Low  381Commissioning of the 300 MHz section of the PF 1 receiver.
300 MHz pointing/focusing
0%Tue 1/29/02Fri 2/22/02Low  373Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 300 MHz axial focus curve (f,pol)
0%Wed 2/20/02Thu 2/21/02LowComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 300 MHz collimation
0%Thu 2/21/02Fri 2/22/02LowComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 300 MHz polarization-switching blanking
0%Tue 1/29/02Wed 1/30/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
300 MHz calibration observations
0%Fri 2/22/02Thu 2/28/02Low 369379Observations with the GBT for receiver commissioning.
Observe 300 MHz gain calibrators(f,pol)
0%Fri 2/22/02Sat 2/23/02LowComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 300 MHz inner beam maps(f,pol)
0%Sat 2/23/02Mon 2/25/02LowComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 300 MHz bandpass(f.pol) and baselines(f,pol)
0%Mon 2/25/02Tue 2/26/02LowComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 300 MHz beam squint(f)
0%Tue 2/26/02Wed 2/27/02LowComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
Determine 300 MHz polarization hybrid settings(f)
0%Wed 2/27/02Thu 2/28/02LowComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency....
300 MHz Calibration Data Reduction
0%Thu 2/28/02Thu 2/28/02Low 373 Data reduction of the gain calibration observations
Determine 300 MHz Tcal(f,pol) and Tsys(f,pol)
0%Thu 2/28/02Thu 2/28/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
PF 300 MHz ready for experiments
0%Thu 2/28/02Thu 2/28/02Low 368453Milestone indicating that the 300 MHz PF receiver is ready for general use....
2-3 GHz
29%Wed 1/30/02Fri 3/15/02Low  396Commissioning of the 2-3 GHz receiver.
2-3 GHz pointing/focusing
0%Wed 1/30/02Sat 3/2/02Low  387Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 2-3 GHz axial focus curve (f,pol)
0%Thu 2/28/02Fri 3/1/02LowComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 2-3 GHz MHz collimation
0%Fri 3/1/02Sat 3/2/02LowComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 2-3 GHz polarization-switching blanking
0%Wed 1/30/02Thu 1/31/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
2-3 GHz calibration observations
40%Sat 3/2/02Thu 3/14/02Low 383393Observations with the GBT for receiver commissioning.
Observe 2-3 GHz gain calibrators(f,pol)
50%Sat 3/9/02Mon 3/11/02LowComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 2-3 GHz inner beam maps(f,pol)
80%Sun 3/10/02Mon 3/11/02LowComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 2-3 GHz bandpass(f.pol) and baselines(f,pol)
0%Sat 3/2/02Mon 3/4/02LowComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 2-3 GHz beam squint(f)
80%Wed 3/13/02Thu 3/14/02LowComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
Determine 2-3 GHz polarization hybrid settings(f)
0%Sun 3/3/02Mon 3/4/02LowComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency....
2-3 GHz calibration data reduction
50%Fri 3/15/02Fri 3/15/02Low 387 Data reduction of the gain calibration observations
Determine 2-3 GHz Tcal(f,pol) and Tsys(f,pol)
50%Fri 3/15/02Fri 3/15/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 2-3 GHz atmospheric Tau(f)
50%Fri 3/15/02Fri 3/15/02LowComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
2-3 GHz ready for experiments
0%Fri 3/15/02Fri 3/15/02Low 382453Milestone indicating that the 2-3 GHz receiver is ready for general use....
4-6 GHz
0%Tue 2/12/02Tue 3/19/02Low 263411Commissioning of the 4-6 GHz receiver.
4-6 GHz pointing/focusing
0%Tue 2/12/02Thu 3/7/02Low  402Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 4-6 GHz axial focus curve (f,pol)
0%Tue 3/5/02Wed 3/6/02LowComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 4-6 GHz MHz collimation
0%Wed 3/6/02Thu 3/7/02LowComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 4-6 GHz polarization-switching blanking
0%Tue 2/12/02Wed 2/13/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
4-6 GHz calibration observations
0%Thu 3/7/02Tue 3/19/02Low 398408Observations with the GBT for receiver commissioning.
Observe 4-6 GHz gain calibrators(f,pol)
0%Thu 3/7/02Fri 3/8/02LowComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 4-6 GHz inner beam maps(f,pol)
0%Fri 3/8/02Sat 3/9/02LowComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 4-6 GHz bandpass(f.pol) and baselines(f,pol)
0%Tue 3/12/02Wed 3/13/02LowComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 4-6 GHz beam squint(f)
0%Thu 3/14/02Fri 3/15/02LowComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
Determine 4-6 GHz polarization hybrid settings(f)
0%Mon 3/18/02Tue 3/19/02LowComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency....
4-6 GHz calibration data reduction
0%Tue 3/19/02Tue 3/19/02Low 402 Data reduction of the gain calibration observations
Determine 4-6 GHz Tcal(f,pol) and Tsys(f,pol)
0%Tue 3/19/02Tue 3/19/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 4-6 GHz atmospheric Tau(f)
0%Tue 3/19/02Tue 3/19/02LowComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
4-6 GHz ready for experiments
0%Tue 3/19/02Tue 3/19/02Low 397453Milestone indicating that the 4-6 GHz receiver is ready for general use....
8-10 GHz
0%Wed 3/20/02Wed 3/27/02Low 263424Commissioning of the 8-10 GHz receiver.
8-10 GHz pointing/focusing
0%Wed 3/20/02Fri 3/22/02Low  416Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 8-10 GHz axial focus curve (f,pol)
0%Wed 3/20/02Thu 3/21/02LowComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 8-10 GHz MHz collimation
0%Thu 3/21/02Fri 3/22/02LowComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
8-10 GHz calibration observations
0%Fri 3/22/02Wed 3/27/02Low 413421Observations with the GBT for receiver commissioning.
Observe 8-10 GHz gain calibrators(f,pol)
0%Fri 3/22/02Sat 3/23/02LowComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 8-10 GHz inner beam maps(f,pol)
0%Sat 3/23/02Mon 3/25/02LowComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 8-10 GHz bandpass(f.pol) and baselines(f,pol)
0%Mon 3/25/02Tue 3/26/02LowComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 8-10 GHz beam squint(f)
0%Tue 3/26/02Wed 3/27/02LowComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
8-10 GHz calibration data reduction
0%Wed 3/27/02Wed 3/27/02Low 416 Data reduction of the gain calibration observations
Determine 8-10 GHz Tcal(f,pol) and Tsys(f,pol)
0%Wed 3/27/02Wed 3/27/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 8-10 GHz atmospheric Tau(f)
0%Wed 3/27/02Wed 3/27/02LowComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
8-10 GHz Ready for Experiments
0%Wed 3/27/02Wed 3/27/02Low 412453Milestone indicating that the 8-10 GHz receiver is ready for general use....
18-26 GHz
0%Thu 3/28/02Wed 4/10/02Low 268438Commissioning of the 18-26 GHz receiver.
18-26 GHz Pointing/Focusing
0%Thu 3/28/02Mon 4/1/02Low  430Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine 18-26 GHz axial focus curve (f,pol)
0%Thu 3/28/02Fri 3/29/02LowComm,GBT,Eng,HiFreq  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure 18-26 GHz MHz collimation
0%Fri 3/29/02Sat 3/30/02LowComm,GBT,Eng,HiFreq  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine 18-26 GHz beam-switching blanking
0%Sat 3/30/02Mon 4/1/02LowComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
18-26 GHz calibration observations
0%Tue 4/2/02Mon 4/8/02Low 426435Observations with the GBT for receiver commissioning.
Observe 18-26 GHz gain calibrators(f,pol)
0%Tue 4/2/02Thu 4/4/02LowComm,GBT,Eng,HiFreq  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure 18-26 GHz inner beam maps(f,pol)
0%Thu 4/4/02Fri 4/5/02LowComm,GBT,Eng,HiFreq  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure 18-26 GHz bandpass(f.pol) and baselines(f,pol)
0%Fri 4/5/02Sat 4/6/02LowComm,GBT,Eng,HiFreq  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes....
Measure 18-26 GHz beam squint(f)
0%Sat 4/6/02Mon 4/8/02LowComm,GBT,Eng,HiFreq  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
18-26 GHz calibration data reduction
0%Tue 4/9/02Wed 4/10/02Low 430 Data reduction of the gain calibration observations
Determine 18-26 GHz Tcal(f,pol) and Tsys(f,pol)
0%Tue 4/9/02Wed 4/10/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
Determine 18-26 GHz atmospheric Tau(f)
0%Tue 4/9/02Wed 4/10/02LowComm  Continuum measurements of calibrator at different elevations for determination of atmospheric opacity across the receiver's bandpass....
18-26 GHz ready for experiments
0%Wed 4/10/02Wed 4/10/02Low 425453Milestone indicating that the 18-26 GHz receiver is ready for general use....
Prime Focus 2
0%Wed 2/13/02Wed 4/17/02Low 59452Commissioning of the Prime Focus 2 receiver. This task needs to be delayed until the receiver is finished.
Prime Focus 2 pointing/focusing
0%Wed 2/13/02Tue 4/9/02Low  444Receiver commissioning task concentrating on the individual receivers collimation and axial focus curves (which should be a function of frequency and polarization)....
Determine PF2 axial focus curve (f,pol)
0%Mon 4/1/02Tue 4/2/02LowComm,GBT,Eng  Continuum pointing observations at multiple focus positions to determine axial focus as a function of polarization and frequency....
Measure PF2 MHz collimation
0%Mon 4/8/02Tue 4/9/02LowComm,GBT,Eng  Continuum pointing observations toward multiple source at different elevations to determine receiver's pointing collimation.
Determine PF2 polarization-switching blanking
0%Wed 2/13/02Thu 2/14/02MediumComm,GBT,Eng  Hardware tests to determine the optimum hardware parameters for the beam-switch/polarization switch.
PF2 calibration observations
0%Thu 4/11/02Wed 4/17/02Low 440450Observations with the GBT for receiver commissioning.
Observe PF2 gain calibrators(f,pol)
0%Thu 4/11/02Fri 4/12/02LowComm,GBT,Eng  Multiple continuum observations of multiple calibrators at multiple frequencies with all polarizations.
Measure PF2 inner beam maps(f,pol)
0%Fri 4/12/02Sat 4/13/02LowComm,GBT,Eng  Continuum mapping of the inner beam of the telescope which should be influenced by the receiver feed's illumination pattern. Illumination might be dependent on frequency and polarization....
Measure PF2 bandpass(f.pol) and baselines(f,pol)
0%Sat 4/13/02Mon 4/15/02LowComm,GBT,Eng  Spectral-line observations toward blank sky (zenith) across the receivers bandpass in all polarizations looking for bandpass and baseline shapes.
Measure PF2 beam squint(f)
0%Mon 4/15/02Tue 4/16/02LowComm,GBT,Eng  Polarization cross continuum measurements of an unpolarized source at various frequencies in all polarizations to determine beam squint....
Determine PF2 polarization hybrid settings(f)
0%Tue 4/16/02Wed 4/17/02LowComm,GBT,Eng  Continuum cross-scan measurements toward an unpolarized source to determine the optimum setting of the polarization hybrid as a function of frequency....
PF2 calibration data reduction
0%Wed 4/17/02Wed 4/17/02Low 444 Data reduction of the gain calibration observations
Determine PF2 Tcal(f,pol) and Tsys(f,pol)
0%Wed 4/17/02Wed 4/17/02LowComm  Data reduction of calibrator data to determine system temperature and noise diode value as a function of frequency for all polarizations. Attempt to rectify any differences between values supplied by engineer and that determined on astronomical sourc...
PF2 ready for experiments
0%Wed 4/17/02Wed 4/17/02Low 439453Milestone indicating that the PF2 receiver is ready for general use....
All receivers have been commissioned
0%Wed 4/17/02Wed 4/17/02Low 324,339,353,367,381,
396,411,424,438,452