Ronald J Maddalena
September 9, 2014
Below is a list of routines I have written that staff and observers
might find useful. Use the associated links for full details and
instructions on each command. Or, use the -help command-line
argument with each.
Allows one to determine how various parameters influence the
theoretical beam shapes, beam and aperture efficiencies, beam areas, … of
telescopes. Calculates the ratio of antenna
temperatures to Tr for extended sources.
Generates high-frequency weather forecasts or postcasts and saves
results to files within a time-stamped directory.
The script underlies the 'cleo forecasts' GUI as well as the Dynamical Scheduling System
Returns either Opacities, Tsys_atm,
Tatm, or Rest for a list of frequencies and MJD's or a list of
polynomial coefficients that can then be used to generate values. Uses
polynomial fits which are archived once per hour by
forecast utilities. The results are generated
much faster than when using the full-blown cleo forecasts
programs, though there is a small loss of accuracy over that
provided by cleo forecasts. The archive goes back to 5 May
2004 and extends to up to 7 days into the future.
The script underlies the calibration for the GBT data pipeline
Calculates the time needed to map an
area based on the integration time per beam area (e.g., the
results from sensitivity calculations), and the area to be
Provides example ASTRID commands as well as other mapping
the typical mapping commands for OTF rectangular maps, OTF Daisy maps,
rectangular maps. Does not include the observing time or overhead
use the Astrid observing procedures of PointMapWithReference,
RALongtMapWithReference, or DecLatMapWithReference.
The script also has a web interface
, though with fewer options and tailored just for the GBT.
Calculates very rough RA, DEC, Az, El,
and Transit times (in UT) for the planets, the Sun and the Moon.
Calculates approximate rise, set, transit and total
visibility times in either LST or UT for a specified equatorial or
galactic position. The default is to calculates LST ranges for an
Returns the galactic background toward a given position at a given frequency using either
the Fortran Tsky.f program that assumes a spectral index of -2.6 or an IdlUtils model which allows the S.I. to vary
across the sky
A directory that contains a series of
Fortran routines that I wrote 2 decades ago but that remain accurate.
The programs that I think some might find useful are:
- apptoepoch -- Converts apparent coordinates to those of a specified epoch
- doppler -- Calculates Doppler correction for a given B1950 position
- epochtoapp -- Converts coordinates of a given epoch to apparent coordinates
- eqtogal -- Converts B1950 equatorial to galactic coordinates
- eqtolocal -- Converts apparent equatorial coordinates to local Az, El
- galtoeq -- Converts Galactic coordinates to B1950 equatorial coordinates
- localtoeq -- Converts local Az, El to apparent equatorial coordinates
- precess -- Converts equatorial coordinates from one epoch to another
- riser -- Calculates the rise and set LST for a given apparent equatorial coordinate
- sunazel -- Calculates the Az and El of the Sun for the current moment or any given UT date and time.
- timer -- Converts between UT, LST, EST, and EDT or calculates these for the current date and time