Weather Conditions:
- Humidity: 13-18%
- Wind: 0-13 mph avg winds
- Skies: clear
- Lowest temp: 41 deg F, 5 deg C
Errors/Issues:
- Had to lower voltage for Rx4 X-Pol to minimum and still did not achieve close to desired IF/LO value. Power level started at normal levels and decreased during first track to ~-15 dB, same as last night of observations. Then it started fluctuating again, going up to -9 dB and back down to normal values in between first and second tracks. Fluctuations of IQ power continued. continued
Executed Runs (10 GHz):
- 10 min Jupiter multi-source track processed as primary calibrator
- 15 min 2253+161 Q2343 IM target calibrator track
- 45 min Q2343 repeated no ccd IM target track
- 15 min 2253+161 Q2343 IM target calibrator track
- 45 min Q2343 repeated no ccd IM target track
- 15 min 2253+161 Q2343 IM target calibrator track
- 45 min Q2343 repeated no ccd IM target track
- 15 min 2253+161 Q2343 IM target calibrator track
- 45 min Q2343 repeated no ccd IM target track
- 15 min 2253+161 Q2343 IM target calibrator track
- 15 min 0319+415 FLANK IM target calibrator track
- 45 min FLANK IM target repeated no-ccd
- 15 min 0319+415 FLANK IM target calibrator track
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-Casandra, Adam
Latest SEFD from the Jupiter 10min track:
X-pol:
## antenna SEFD: (MJy)
Ant0 Ant1 Ant2 Ant3 Ant4 Ant5 Ant6
LSB:: 0.58 0.58 0.67 0.86 nan 0.61 0.69
USB:: 0.59 0.55 0.65 0.77 nan 0.57 0.66
Y-pol:
## antenna SEFD: (MJy)
Ant0 Ant1 Ant2 Ant3 Ant4 Ant5 Ant6
LSB:: 0.57 0.66 0.63 0.80 nan 0.65 0.65
USB:: 0.54 0.66 0.61 0.76 nan 0.57 0.63
— Kyle
Hi Kyle,
It looks like Rx4 is still bad. It might be a bad cold head. Unfortunately, we do not have any more new cold heads and I have been using used cold heads for Rx4. It cooled on the 1st day but warmed up after that. We can try another used cold head but it may just warm up again.