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lbaops:lbamar2008:v252datlog
Recording to ATNF V015B
| 01:57 | pre-start cacal phase |
| 02:00 | onsource tied C12345 |
| ~2:10 | cacal phase |
| 02:33 | cacal |
| 03:23 | cacal |
| 04:13 | cacal |
Phase drifting relatively fast. Weather?
03:40 scan on 0252-474 shows rapid phase variation and amplitude dips. Seemon shows path noise has shot up to 2000 microns over the last ~10 minutes from ~500 microns, so atmospheric turbulence (usually worst in a diurnal sense at around this time of day) is the cause.
05:50 phase stability continues to be poor, so “untie” the array and keep only CA04 in the tied array.
05:57 concensus that tying 1 and 4 will be okay! So change catie and change correlator logging accordingly.
21:01 UT: stop during slew between sources to take CA06 out, then restart. (No impact on the VLBI observing, but note it here for the record.)
lbaops/lbamar2008/v252datlog.txt · Last modified: 2015/12/18 16:38 by 127.0.0.1
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