[evlatests] Data Quality Report, AJ329, X band, September 18

[Jim Ulvestad]

Report on AJ329, X band 50 MHz continuum, observed September 18
===============================================================
Four EVLA antennas used: 13, 14, 16, 18.
10 second integrations, standard VLA X-band frequencies.
3 hours of observations.

Antenna 14AC and 13BD were both bad at X band, consistent
with Ken Sowinski's report on September 14.

Otherwise, EVLA antennas performed fairly well.  In about 6 out
of 34 scans, there were some bogus data points in the very first
record, only on EVLA-EVLA baselines that got through unflagged.
Most scans had the first unflagged EVLA-EVLA points showing up at
the same time as the first VLA-VLA points; when that happened, the
EVLA data were always good.  I saw no sign of drops in the very
last points of the scans or of the whole observation.

Antennas ranked by AIPS weights below: 1 is best, 24 is worst.  Note that
antennas in the middle are fairly similar; i.e., the 3rd best antenna
and the 10th best antenna typically are not very far apart.

Antenna 18 is the worst, presumably the water in the feed problem.
HOWEVER, antenna 9 is just as bad as antenna 18, and antenna 19
is not a lot better.  One wonders if the summer rains have put
moisture into more than one feed.

13A (RCP) - 1
13B (RCP) - OUT
13C (LCP) - 1
13D (LCP) - OUT

14A - OUT
14B - 21
14C - OUT
14D - 21

16A - 3 (tie)
16B - 3
16C - 10
16D - 6

18A - WORST
18B - WORST
18C - WORST
18D - WORST