[evlatests] 10Sep07 AM899 quick note

[Ed Fomalont]

Sep 10; AM899  quick comments:

1.  Lband, two IF's, two Pols, each with 7 channels

2.  Antenna 1 all bands horrible with many kJy amplitude spikes--must 
flag.  Rest of data looks good except for a little interference and 
usual phase jumps on 11. (14 and 18 are out)

3.  The bandpass amplitude shapes for all telescopes changed parity 
between the Sep 8 and Sep 10 AM899 observations.  Sep 8 chan 1->7 looks 
like Sep 10 chan 7->1.  YET, THE PHASES REMAIN THE SAME PARITY 
(reference was antenna 6 in both cases).  Is this just a coindicence? 
Since there has been a discussion about frequency directions, did 
something change?  puzzled.

4.  Ante 6, IF2, stokes L has very low calibration value, reminiscent of 
the ante 19 problem a few weeks ago.  This may give an artifically high 
weight to this telescopes.

5.  Images look fine.  As expected, some correlator offset crud at 
center of deep field.