|
User Documentation |
|||||||||
prev file | next file | ||||||||||
SUMMARY: fields | routine DETAILS: routine | ||||||||||
./contrib scalarSubNod.pro
scalarSubNod.pro provides routines for calibration of GBT observations done with subreflector nodding. e.g. observing scripts would be similar to:
SubBeamNod( src, scanDuration=120.0, beamName="MR12", nodLenth=5, nodUnit="integrations" )
The routines in scalarSubNod.pro do calibration using a single Tcal (scalar) per spectral window (IF), using the values for Tcal from the sdfits file. The calibrated Tant or Ta* is calculated and the resulting spectrum is stored in data container zero.
To calibrate subreflector nodding using vector Tcals, use the routines in getVctr.pro, after having derived the vector Tcals from an observation of a flux calibrator using the appropriate routines in scal.pro.
Note : compiling this file invokes createCalStruct from scal.pro.
Contributed by: F. Ghigo, NRAO-GB
Routine Summary 4 routines |
procedure getSNod, scan, [ifnum=integer], [plnum=integer], [refsmth=refsmth], [units=string], [tau=float] | |
Performs scalar Tcal calibration for a Subreflector Nod observation with Q, Ku, K-band, or W-band. |
procedure getKaSNod, scan, [ifnum=integer], [refsmth=refsmth], [units=string], [tau=float] | |
Performs scalar Tcal calibration for a Subreflector Nod observation with Ka-band. |
procedure getSNodClassic, scan, [ifnum=integer], [plnum=integer], [refsmth=refsmth], [units=string], [tau=float] | |
Performs "Classic" (Tsys(SIG_REF)/REF) scalar calibration for a Subreflector Nod observation with Q, Ku, K-band, or W-band. |
procedure getKaSNodClassic, scan, [ifnum=integer], [refsmth=refsmth], [units=string], [tau=float] | |
Performs a "classic" (Tsys(SIG_REF)/REF) scalar calibration for a Subreflector Nod observation with Ka-band. |
Routine Details |
getSNod |
procedure getSNod, scan, [ifnum=integer], [plnum=integer], [refsmth=refsmth], [units=string], [tau=float] |
Performs scalar Tcal calibration for a Subreflector Nod observation with Q, Ku, K-band, or W-band.
Combines data from the two beams in the 'correct' way.
Tant = mean(Tcal) * (SIG-REF)/(Cal_on-Cal_off) -- units : Kelvin
Ta* = Tant*exp(tau*Airmass), if units="Ta*"
Store results in the PDC
Note: depends on routines in scalUtils.pro and scal.pro
Contributed By: Ron Maddalena, NRAO-GB
units and tau added by F. Ghigo, NRAO-GB
Parameters | |
scan |
the scan number for the Track observation |
getKaSNod |
procedure getKaSNod, scan, [ifnum=integer], [refsmth=refsmth], [units=string], [tau=float] |
Performs scalar Tcal calibration for a Subreflector Nod observation with Ka-band.
Combines data from the two beam/pols/phases in the 'correct' way.
Tant = mean(Tcal) * (SIG-REF)/(Cal_on-Cal_off) -- units : Kelvin
Ta* = Tant*exp(tau*Airmass), if units="Ta*"
Stores results in the PDC
Note: depends on routines in scalUtils.pro and scal.pro
Contributed By: Ron Maddalena, NRAO-GB
units and tau added by F. Ghigo, NRAO-GB
Parameters | |
scan |
the scan number for the Track observation |
getSNodClassic |
procedure getSNodClassic, scan, [ifnum=integer], [plnum=integer], [refsmth=refsmth], [units=string], [tau=float] |
Performs "Classic" (Tsys(SIG_REF)/REF) scalar calibration for a Subreflector Nod observation with Q, Ku, K-band, or W-band.
Combines data from the two beams in the 'correct' way.
Tant = mean(Tsys) * (SIG-REF)/REF -- units : Kelvin
Ta* = Tant * exp( tau*Airmass), if units=Ta*
Store results in the PDC
Note: depends on routines in scalUtils.pro and scal.pro
Contributed By: Ron Maddalena, NRAO-GB
units and tau added by F. Ghigo, NRAO-GB
Parameters | |
scan |
the scan number for the Track observation |
getKaSNodClassic |
procedure getKaSNodClassic, scan, [ifnum=integer], [refsmth=refsmth], [units=string], [tau=float] |
Performs a "classic" (Tsys(SIG_REF)/REF) scalar calibration for a Subreflector Nod observation with Ka-band.
Combines data from the two beam/phases in the 'correct' way.
"Classic" : Tant = mean(Tsys) * (SIG-REF)/REF -- units : Kelvin
Ta* = Tant * exp(tau*Airmass), if units="Ta*"
Stores results in the PDC
Note: depends on routines in scalUtils.pro and scal.pro
Contributed By: Ron Maddalena, NRAO-GB
units and tau added by F. Ghigo, NRAO-GB
Parameters | |
scan |
the scan number for the Track observation |