AIPS HELP file for PHNEG in 31DEC25
As of Mon Dec 9 13:53:29 2024
PHNEG: Task which negates all visibility phases in a dataset.
INPUTS
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 #.
FQCENTER >= 0 -> center frequency axis
HELP SECTION
PHNEG
Task: PHNEG negates the sign of the visibility phase
for all visibilities in the datafile. This task was
created to fix an inconsistency in the phase sign convention
adopted in the Mitaka correlator FITS generation software.
Running this task is necesary for FITS data produced directly
by the Mitaka correlator prior to ?? August 1998.
Adverbs:
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 with
space for the file.
FQCENTER,...> 0 => Change frequency axis reference pixel to
Nchan / 2 + 1
else => do not change reference pixel
EXPLAIN SECTION
Documentor: G. Moellenbrock 98Aug13