Difference between revisions of "2017 July"

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(Jul 01)
(Jul 01)
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'''04:04 UT''' The first two scans worked fine, but I could not get $PA-STOP to work (should zero the FRM PA, but instead it kept sending commands to keep the feed perpendicular, overriding my FRM-SET-PA -90 command).  I had to kill the schedule and reopen it.  Now on the third scan as of 04:03 UT.
 
'''04:04 UT''' The first two scans worked fine, but I could not get $PA-STOP to work (should zero the FRM PA, but instead it kept sending commands to keep the feed perpendicular, overriding my FRM-SET-PA -90 command).  I had to kill the schedule and reopen it.  Now on the third scan as of 04:03 UT.
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'''04:56 UT''' Those scans are completed.  I then updated the delays (needed for ant 12, but also some very small changes to some others).  All of these calibrations are "between" the ones needed for the Sun, so should not affect those data.

Revision as of 04:57, 1 July 2017

Back to Observing Log

Jul 01

03:17 UT Ant 12 is back! It will no doubt have terrible delays. Meanwhile, I am redoing my earlier calibration on 3C273 with parallel and crossed feeds, but now adding parallel and crossed feeds for the equatorial dishes. A total of four scans are being taken, in this order:

  • one with the 27-m feed tracking parallactic angle (gives parallel-feed data for azel dishes 1-8, 12),
  • one with the 27-m feed tracking parallactic angle + 90 degrees (gives crossed-feed data for azel dishes 1-8, 12),
  • one with the 27-m feed rotated by to 90-degrees (gives crossed-feed data for equatorial dishes 9-11, 13),
  • one with the 27-m feed unrotated (gives parallel-feed data for equatorial dishes 9-11, 13)

04:04 UT The first two scans worked fine, but I could not get $PA-STOP to work (should zero the FRM PA, but instead it kept sending commands to keep the feed perpendicular, overriding my FRM-SET-PA -90 command). I had to kill the schedule and reopen it. Now on the third scan as of 04:03 UT.

04:56 UT Those scans are completed. I then updated the delays (needed for ant 12, but also some very small changes to some others). All of these calibrations are "between" the ones needed for the Sun, so should not affect those data.