[evlatests] FRING aborting, solved (from an AIPS perspective)

[Rick Perley]

    Eric quickly discovered why FRING aborted on the X-band data:

    The FQ table's entries for the channel increment were reversed in 
sign.  For X-band, this has to be negative.  For the X-band database I 
received it was positive.  (The problem arises because the sub-band 
centers decrease in frequency as the subband number increases.  The 
frequency index should also decrease (i.e., be negative), but were 
listed as positive, or frequency increasing.  This did bad things to a 
global solution.) 
    
    Eric flipped the sign of the frequency increment index in AIPS, 
after which FRING worked normally, both on the original data, and on the 
FLOPMed version. 

    The problem arises upstream from AIPS.  Steve is investigating ...