AIPS HELP file for CMETHOD in 31DEC25
As of Tue Dec 10 5:48:26 2024
HELP SECTION
CMETHOD
Type: Adverb (String*4)
Use: To select the method used to compute the fringe visibilities of
the source model.
'DFT ' uses the direct Fourier transform, which is the most
accurate.
'GRID' does a gridded-FFT interpolation model computation.
' ' allows the program to use the fastest method, which is
usually DFT at the beginning of a Clean and GRID later
when there are more Clean components to subtract
Null value:
' ' => task chooses
Tasks:
BLCAL.......Compute closure offset corrections
BLCHN.......Compute closure offset corrections on a
channel-by-channel basis
BLING.......Find residual rate and delay on individual baselines
BPASS.......Computes spectral bandpass correction table
CALIB.......Determines the calibration to be applied to a uv data set
given a model of the source.
CPASS.......Computes polynomial spectral bandpass correction table
EVAUV.......Subtracts & divides a model into UV data, does
statistics on results
FRING.......Fringe fit data to determine antenna calibration,
delay, rate
IMAGR.......Images and Cleans uv data.
KRING.......Fringe fit data to determine antenna calibration,
delay, rate
LPCAL.......Determines instrumental polarization for UV data
OOSUB.......Subtracts/divides a model from/into a uv data base
PCAL........Determines instrumental polarization for UV data
RLCAL.......Determines instrumental right-left phase versus time (a
self-cal)
SCIMG.......Full-featured imaging plus self-calibration loop with
editing
SCMAP.......Images, cleans, and self-cals a uv data set
iteratively.
UVCON.......Generate sample UV coverage given a user defined array
layout
UVSUB.......Subtracts/divides a model from/into a uv data base.
Procedures:
IMFRING.....Large image delay fitting with IM2CC and OOFRING.
IMSCAL......Large image self-cal with IM2CC and OOCAL.
LINIMAGE....Build image cube from multi-IF data set.
OOCAL.......Determines antenna complex gain with frequency-dependent
models.
OOFRING.....Fringe fit data to determine calibration with spectral
index options.
EXPLAIN SECTION