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lbaops:lbajul2009:v275cholog [2009/07/02 23:30]
sellings
lbaops:lbajul2009:v275cholog [2015/12/18 16:38] (current)
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   * Brief coherence tone at 22305 MHz at 071238 (on for a few seconds).   * Brief coherence tone at 22305 MHz at 071238 (on for a few seconds).
   * Did a couple of scans on Virgo and 1253-05 prior to the start of the experiment. ​ Sources detected, both are around 20 Jy at 22 GHz and were at moderately low elevations of around 20-30 degrees, but scans noisy. ​ The weather at Ceduna was overcast and windy (Hobart was more overcast but still). ​ Implied system temperatures from rough calculations very high, suspect true system temperature around 2500 Jy at Hobart and similar (perhaps 3500 Jy) at Ceduna. ​ Cal heights used for system temperature measurements have been scaled to give roughly these values.   * Did a couple of scans on Virgo and 1253-05 prior to the start of the experiment. ​ Sources detected, both are around 20 Jy at 22 GHz and were at moderately low elevations of around 20-30 degrees, but scans noisy. ​ The weather at Ceduna was overcast and windy (Hobart was more overcast but still). ​ Implied system temperatures from rough calculations very high, suspect true system temperature around 2500 Jy at Hobart and similar (perhaps 3500 Jy) at Ceduna. ​ Cal heights used for system temperature measurements have been scaled to give roughly these values.
 +  * Lost data (70 seconds total) 14:45:10 - 14:​46:​20. ​ Cdisko was frozen. ​ Data was still being recorded. ​ I killed cdisko (control-c),​ but it wouldn'​t restart, when I typed cdisko.pl nothing happened. ​ I had to stop and restart the server recorder on hovsi, then cdisko restarted OK.
 +  * Significant rain overnight >5mm of rain (15-22 UT), crappy weather for 22 GHz, expect poor performance from Hobart over that period.
  
  
lbaops/lbajul2009/v275cholog.txt · Last modified: 2015/12/18 16:38 (external edit)