[daip] New Client Reply - [!XSK-573080]: Calibrating weights doesn't seem to work....

[Michael Bietenholz]

New Client Reply: Calibrating weights doesn't seem to work....

It might be good to make a note in the SPLIT explain file for people like me who didn't realize it had changed.
(My strategy was to make the simplifying assumption that the real input weights from the correlator were all the same, which is usually fairly close to true, so that using the 1.000 values for the JVLA is not a bad approximation.  Subsequently calibrating the weights would allow the weights to reflect correctly the significant differences between IFs/SPWs, although the absolute values would be meaningless, ie. the weights are in some unkown unit rather then Jy^-2.)

When getting an SDM from the archive is there any way to average and/or select scans?  It sounds like not,  which could make the OBIT route a little cumbersome for large data sets where you don't need to full freq resoln, or want to process just a part).  

If going the REWAY route for JVLA continuum stuff, do you just use APARM=0?  Are there compelling reasons to try and get the original wts from the SDM, or does running REWAY work pretty reliably?

Does REWAY calculate rms on basis of amplitude only or does it use full complex vis?  Ie. if you have delay wrong will REWAY results be garbled?

                    - thanks,            m


Ticket Details
===================
Ticket ID: XSK-573080
Department: AIPS Data Processing
Priority: Default
Status: Open
Link:  https://help.nrao.edu/staff/index.php?_m=tickets&_a=viewticket&ticketid=3270