[daip] New Staff Reply - [!VFT-650742]: EVLA Data In AIPS

Eric Greisen do-not-reply at nrao.edu
Mon Jul 19 15:35:38 EDT 2010


New Staff Reply: EVLA Data In AIPS

Your query is falling between the cracks of our current help desk and I will
send it around a bit.

I don't see any suggestion that something was done incorrectly by AIPS
or any glaring user error.  I would have run FRING before frequency averaging.
If there are significant delays, then the frequency averaging causes a loss 
of amplitude which will not be corrected later (at least at present).  Was there
a phase slop before FRING that was then removed by FRING?

At L band there is almost always a lot of RFI and I do not see mention of
that either.  Is it possible that RFI is damaging the bandpass or fring or
calib solutions?  SPFLG may be painful but may be required to check for this.

I absolutely agree that the CALIB solutions cannot be right.  L band at D
array should have rock solid phases.

Eric Greisen

Ticket Details
===================
Ticket ID: VFT-650742
Department: AIPS Data Processing
Priority: Default
Status: Open
Link:  https://help.nrao.edu/staff/index.php?_m=tickets&_a=viewticket&ticketid=321




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