AIPS HELP file for BASRM in 31DEC21
As of Tue Oct 26 21:38:41 2021
BASRM: Task to remove a spectral baseline from total power
INNAME Input UV file name (name)
INCLASS Input UV file name (class)
INSEQ 0.0 9999.0 Input UV file name (seq. #)
INDISK 0.0 9.0 Input UV file disk unit #
OUTNAME Output UV file name (name)
OUTCLASS Output UV file name (class)
OUTSEQ -1.0 9999.0 Output UV file name (seq. #)
OUTDISK 0.0 9.0 Output UV file disk unit #.
SELBAND Bandwidth to select (kHz)
SELFREQ Frequency to select (MHz)
FREQID Freq. ID to select. 0=> all
APARM (1) Order of polynomial
(2) > 0 => Write out
polynomials, not spectra
(3) > 0 => print polynomial
coefficients on screen.
BPARM Up to 5 sets of start and
stop channel ranges to fit
Task: This task will copy a uv data set removing a spectral
baseline from total power data along the way. Cross-power data
are untouched by this operation. The user is able to fit and
remove an nth order polynomial from line-free channels of the
total power spectra.
NOTE: this task does NOT apply flagging or calibration tables
to the input UV data. Run SPLIT first if that operation is
INNAME.....Input UV file name (name). Standard defaults.
INCLASS....Input UV file name (class). Standard defaults.
INSEQ......Input UV file name (seq. #). 0 => highest.
INDISK.....Disk drive # of input UV file. 0 => any.
OUTNAME....Output UV file name (name). Standard defaults.
OUTCLASS...Output UV file name (class). Standard defaults.
OUTSEQ.....Output UV file name (seq. #). 0 => highest unique
OUTDISK....Disk drive # of output UV file. 0 => highest w room
SELBAND....Bandwidth of data to be selected. If more than
one IF is present SELBAND is the width of the
first IF required. Units = kHz.
SELFREQ....Frequency of data to be selected. Units = MHz.
FREQID.....Frequency identifier to select (you may determine
which is applicable from the OPTYPE='SCAN' listing
produced by LISTR). If either SELBAND or SELFREQ
are set, their values overide that of FREQID.
However, setting SELBAND and SELFREQ may result in
an ambiguity. In that case, the task will request
that you use FREQID. (.le. 0 => all). If you select
data with the FREQ adverbs BASRM will renumber the
FREQID in the output file to 1, i.e. you can set
FREQID to the default value for all subsequent
operations on the output file.
APARM......(1) Order of the polynomial to be removed, 0=>
constant offset only.
(2) if > 0 replace the total power spectra in the
output file with the polynomial fitted to the
line-free channels rather than just writing
out the corrected spectra.
(3) if > 0 will print fitted polynomial
coefficients for each spectrum.
BPARM......Up to 5 sets of start and stop channels numbers
representing the channel ranges to be used in
determining the polynomials.