[Mnj] FILLM bug

Eric Greisen egreisen at nrao.edu
Mon Oct 20 13:47:39 EDT 2008


FILLM has had a bug described below from Sept 13 until tomorrow morning.
It affects primarily CL table gains for high frequencies when the 
program changed bands during the observations.


12737.  October 20, 2008           FILLM                   Eric
         The change of September 12 (#12709) had unintended
         consequences.  The band changed to the new band before the
         present scan was finished.  The only known consequence was to
         the last record in the CL and TY tables.  The latter would
         matter only for 4 or P band and would cause a different system
         temperature to be chosen.  The CL table however would have the
         atmospheric opacity and antenna gain correction for the next
         band rather than the present band.  This could make a
         substantial (e.g. 5 %) difference in the gains.  Use of INDXR
         to make a new CL table erases this problem.
         Changed the code to find the new band only for deciding about
         keeping the data or not but leaving the band ID unchanged
         until the data are fully absorbed.
         Moved nowhere.

Sorry about that..

Eric Greisen




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