[evlatests] AB1204 5/6mar06

[Michael Rupen]

AB1204: continuum observations of high-dec source, all bands
5-6mar06:  8 hour run (19:20-03:17) at L C X U K Q bands
M. Rupen  6mar06

SUMMARY
* Ref. pointing at X band failed for 0.8 Jy calibrator, worked fine on 3C48
   - EVLA antennas worked nicely at K/Q bands when refptg worked

* EVLA antennas dropped to low amp. and random phase on
   3 of 7 scans at L band
   1 of 5 scans at X band (2 fast-switching scans not counted in these 5 were
                           also fine)
   C band data were all fine

   The most obvious correlation is that MOST (but not all!) of the X/L-band
   scans which occur right after a freq. change fail.  This could also
   explain the ref.ptg. failures.

* When present at all, EVLA antennas looked roughly ok at L, C, X, K, Q
   bands (ant. 13 not present at K,Q)


DETAILS OF INTERESTING BITS
* Ref. pointing (at X band) worked for all antennas on 3C48
   Ref. pointing (at X band) worked for all EXCEPT the EVLA antennas, on
     0303+472 (0.8 Jy yesterday, according to my quickie calibration)
   There are a couple of VLA dropouts, but only three (two in the last scan
     on 3C48, one on one of the "interior" 0303+472 scans).

* Obs. file was as follows:
   [fs --> fast switching; SN is target source, too faint to check fringing
    trivially]

      3C48     L C X X-refptg U K Q   all ok

      0303+472 X                      ok
   SN/0230+405 X-fs                   ok

      0303+472 L                      EVLA FAILED
      SN       L                      ---
      0303+472 L                      ok

      0303+472 C                      ok
      SN       C                      ---
      0303+472 C                      ok
      SN       C                      ---

      0303+472 U                      ---
   SN/0230+405 U-fs                   ---

      0303+472 X-refptg               EVLA FAILED
      0303+472 K                      EVLA not pointed
   SN/0230+405 K-fs                   EVLA not pointed

      0303+472 X-refptg               EVLA FAILED
      0303+472 Q                      EVLA not pointed
   SN/0230+405 Q-fs                   EVLA not pointed

      0303+472 X                      EVLA FAILED
   SN/0230+405 X-fs                   ok

      0303+472 L                      EVLA FAILED
      SN       L                      ---
      0303+472 L                      ok

      0303+472 C                      ok
      SN       C                      ---

      0303+472 U                      ---
   SN/0230+405 U-fs                   ---

      0303+472 X-refptg               EVLA FAILED
      0303+472 K                      EVLA not pointed
   SN/0230+405 K-fs                   EVLA not pointed

      0303+472 X-refptg               EVLA FAILED
      0303+472 Q                      EVLA not pointed
   SN/0230+405 Q-fs                   EVLA not pointed
      0303+472 Q                      EVLA not pointed

      0303+472 L                      EVLA FAILED
      SN       L                      ---
      0303+472 L                      ok

      0303+472 C                      ok
      SN       C                      ---

      0303+472 X                      ok
   SN/0230+405 X-fs                   ok

      3C48     L C X X-refptg U K Q   all ok

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