[daip] VLBI questions

[Eric Greisen]

Cheng-Yu Kuo writes:

 > 1. In our observations, there are 8 IF bands in total. When loading
 > the data from the tape to the disk with FITLD in AIPS, AIPS sorted
 > the data into two frequency IDs. Each freqID contains 4 IF bands.
 > However, out of our expection, there is almost no data in the second
 > freqID, so we are missing almost half of the data. We do try to use UVPLT
 > to show the data of the second IF, but the amount of the data is just
 > much much less than it should be. Maybe it is the problem when the data
 > was correlated? Or because we did load the data properly?

    Can you send us (daip) the headers of the data sets and the output
of LISTR OPCODE='SCAN'?  Programs like UVPLT have many adverbs that
limit which data are seen and not seen and so may appear to suggest
that data are missing when they are not...

 > 
 > 
 > 2. The other problem is the following: We used 12 antennas to make
 > our VLBI observations. When we looked into the GC and TY tables, the
 > information of all the antennas are there. However, when we printed
 > the antenna table (AN), there are only 11 antennas. The antenna in
 > St. Croix is missing. We are not sure about this problem as well.
 > 

Out VLBI ewxpert will get back to you but I am sure that she will need
this information.

Eric Greisen