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lbaops:lbajul2009:v275ccdlog

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lbaops:lbajul2009:v275ccdlog [2009/07/02 21:09]
sellings
lbaops:lbajul2009:v275ccdlog [2015/12/18 16:38] (current)
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-  * Recording to Disk set ATNF V016B +  * Recording to Disk set ATNF V009A 
-  * Recording started ​070040, antenna onsource at that time also+  * Recording started ​070100, antenna onsource at that time also
   * 22 GHz receiver   * 22 GHz receiver
   * Agilent set to 17.4 GHz, 16 dBm   * Agilent set to 17.4 GHz, 16 dBm
Line 9: Line 9:
   * DAS profile VSOP_HO.PRO   * DAS profile VSOP_HO.PRO
   * Coherence (against 500 Hz tone) achieved with an 892.00002 MHz tone into tone port (25th harmonic is 22300.0005 MHz)   * Coherence (against 500 Hz tone) achieved with an 892.00002 MHz tone into tone port (25th harmonic is 22300.0005 MHz)
 +  * Clock offset 5.5 microseconds,​ maser leads GPS
 +
 +  * 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.
 +  * Getting 1PPS missing errors at the rate of 2-3 per hour (10 in the first 4 hours of this experiment).
  
  
lbaops/lbajul2009/v275ccdlog.1246532976.txt.gz · Last modified: 2015/12/18 16:38 (external edit)