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Agilent 6.2 GHz, LOs at 702 MHz, Tone at 679.5 MHz and coherence confirmed.


tsys1 and tsys2 values fluctuating during the experiment. Will run a calibration at the end of LBA. See V471bCdLog for more information. Results from Bruce scans (courtesy of Jamie MacCallum) below:

Results after LBA run: SEFD @ 1650 is ~1200 Jy for both polarisations
SEFD @ 1370 is ~1500/1450 Jy for RCP/LCP
CALs are 36/42 Jy at 1650 (RCP/LCP)
CALs are 442/267 Jy at 1370 (RCP/LCP)
1370 scans were remarkably interference free.
1650 suffered intermittent RFI, sometimes enough to swamp Virgo. Peak amplitude of RFI pulses was ~2000 Jy
RFI sometimes showed time/spatial structure (appeared as regular variations during a scan but it's not clear whether it's pulsed in time or if it's something being scanned into sidelobes or the like.
All flux density calibrations performed using Virgo.

We noted that the DAS computer had stalled at the start of the next experiment. The problem could have manifested during this observation as well. We suspect that the field system computer had stopped communication with the DAS, but that data would still have been acquired.

lbaops/lbanov2012/v483acdlog.txt · Last modified: 2015/12/18 16:38 by