Basic Information on mopfix

Task: mopfix
Purpose: Recalculate (u,v,w) in a Mopra RPFITS file
Categories: analysis

        MOPFIX reads in an RPF file and a table of (t,RA,DEC) values
        from RPFREAD.  The position table is interpolated onto the
        spectral timestamps and a corrected RPFITS file is produced.
        MOPFIX can also be used to resample in frequency (by spline
        interpolation), flag data over a certain time range, and convert
        BUNIT to 'K' (it does the last of these automatically).
 
        Addendum Feb 9 2011 / ind006: Spoke with Tony Wong about the
        purpose of this program in MOPS years. There appears to be no
        practical reason why this should be used by any observers to
        reduce their data from 2007 onwards. Originally, it changed
        position timestamps in OTF mapping to correspond to the
        spectral timestamps. Latency used to be too large for livedata
        to handle this properly in one pass. This however was fixed
        many years ago. The other functions as described above
        might still potentially be beneficial hence this remains
        included in miriad.

Key: in
        Input RPFITS file.  No default.

Key: out
        Output RPFITS file.  Default name has 'ix' appended (i.e.
        2004-06-24_2300.rpf --> 2004-06-24_2300.rpfix).  The program
        will exit with an error if the output fil already exists.

Key: postab
        Table of positions, default is pos.tab.  If the file does not
        exist, the position correction is not done.  The table can be
        created with RPFREAD using the posout= keyword.

Key: maxgap
        Maximum position jump in arcmin for interpolation.  If the
        distance between the flanking position stamps exceeds this, the
        spectrum is flagged.  Default: 1 arcmin.

Key: flagtime
        Up to four time ranges to flag spectra.  Give up to four pairs
        of values in UT hh:mm:ss format separated by commas.  Default is
        no flagging.  If a pair is in reverse time order, it is assumed
        that the time range wraps around a UT day boundary.

Key: flagscan
        Up to four scan ranges to flag spectra.  Give up to four pairs
        of values numbered starting from 1.  RPFREAD options=brief can
        be used to list all the scans in a file (including offs and
        paddles).  Default is no flagging.

Key: resample
        Factor (>0) to change the channel width by.  Total bandwidth is
        approximately preserved while the number of channels changes (a
        spline interpolation is performed).  Default is not to change
        this.

Key: options
        Extra processing options.
        'keepflag'  Preserve online flagging.  By default all spectra
                    are unflagged and only flagged based on maxgap
                    above.
        'doextrap'  Use linear extrapolation if gap between flanking
                    position stamps exceeds maxgap.
        'noref'     Eliminate the reference scans from the file.
 
Revision: 1.13, 2013/08/30 01:49:21 UTC