[daip] Problems with FITLD

[Eric Greisen]

Francesca D'Arcangelo wrote:
> Hello.  I am having issues with FITLD producing corrupted weather
> tables when I load in my VLBA data.  I know that this was a problem
> before, solved with the patch on 01/18/08.  This worked on my previous
> install of 31DEC08.  However, I recently had to wipe my OS and, as a
> result, reinstall AIPS.  Ever since, I have been receiving these
> weather table errors from APCAL:
> 
> APCAL1: Task APCAL  (release of 31DEC08) begins
> APCAL1: REAWX: ERROR  6 SOMETHING WRONG WITH WX TABLE
> APCAL1: REAWX: WXINI FINDS     0 ROWS, WX TABLE CORRUPT?
> APCAL1: TXTWX: ERR  6 OPENING WX TABLE   1
> APCAL1: Purports to die of UNNATURAL causes
> APCAL1: agn          31DEC08 TST: Cpu=       0.0  Real=       0
> 
> Now, I reinstalled AIPS another time for good measure, and I ran the
> MNJ several times over a number of days, with seemingly no errors.
> After more WX errors, I attempted to do the FITLD patch by hand from
> the Patches section of the AIPS site, however I received an error when
> I used the COMLNK line :
> 
> AIPS environment not defined; do CDTST?
> 
> I'm not sure how to proceed on that.
> I have tried to run the program sequence on both the calibrated VLBA
> files *and* on the individual raw files from the archive (combined
> with DBCON), so that shouldn't be the problem.  I tried reading out
> (TBOUT) and in (TBIN) the WX table.  I even went so far as to paste in
> a version of FITLD.EXE from a colleague who has had no weather table
> problems.  And yet I still get the WX table errors.  Is there anything
> else I can do?  Is there a way of editing the table to suit the
> "infile" line in APCAL, perhaps?
>

The data in the archive - when in the form that has had some aips 
processing - is corrupted.  I had suggested that these data be corrected 
but so far that has not been done.  You will need to download the raw 
data - not the files that have had FITLD and other tasks already run on 
them.  They are called "raw" I believe while the others are called 
"cal".  You do not need to concatenate the raw files before FITLD - it 
will read as many (sequentially named) files as you tell it to read.

Eric Greisen