...
After running the RTS (see below) and checking the solutions (using the python scripts supplied in VCSTools), I found that I also had to add 14 to the list of flagged channels, and 52, 53 and 59 to the list of flagged tiles.
...
| Code Block | ||||||||
|---|---|---|---|---|---|---|---|---|
| ||||||||
ReadAllFromSingleFile= BaseFilename=/astro/mwavcs/vcs/1318345216/cal/1318345216/vis/*_gpubox ReadGpuboxDirect=0 UseCorrelatorInput=1 ReadMetafitsFile=1 MetafitsFilename=/astro/mwavcs/vcs/1318345216/1318345216 DoCalibration= doMWArxCorrections=1 doRawDataCorrections=1 doRFIflagging=0 useFastPrimaryBeamModels=0 generateDIjones=1 applyDIcalibration=1 UsePacketInput=0 UseThreadedVI=1 MaxFrequency=170.24 ObservationFrequencyBase=138.895 ObservationTimeBase=2455846.1252314816 ObservationPointCentreHA=-0.35952189154909175 ObservationPointCentreDec=-5.98757073636307 ChannelBandwidth=0.04 NumberOfChannels=32 CorrDumpsPerCadence=128 CorrDumpTime=1.0 NumberOfIntegrationBins=6 NumberOfIterations=1 StartProcessingAt=0 ArrayPositionLat=-26.7033194 ArrayPositionLong=116.6708152 ArrayNumberOfStations=128 ArrayFile= SourceCatalogueFile=/astro/mwavcs/vcs/1318345216/cal/1318345216/srclist_pumav3_EoR0aegean_EoR1pietro+ForA_1318345216_patch1000.txt NumberOfCalibrators=1 NumberOfSourcesToPeel=0 calBaselineMin=20.0 calShortBaselineTaper=40.0 FieldOfViewDegrees=1 |
Make a "calibration" metafits
In order to be able to use this calibration solution for beamforming, mwalib has to be "tricked" into getting the frequency resolution right (i.e. whatever we set during the offline correlation step). To do this, make a copy of the metafits file and change
FINECHAN → 40 (kHz)
NCHANS → 768
MODE → 'HWLFILES'
I then saved this file to /astro/mwavcs/vcs/1318345216/cal/1318345216_cal.metafits.
Beamform
For the time being, we have to "trick" the beamformer into thinking this is a legacy VCS observation, instead of an MWAX VCS observation. I did this by creating a copy of the metafits file and changing the "MODE" and "NCHANS" fields to 'VOLTAGE_START' and 3072, respectively. [MEMO TO SELF: add an option to "force" the beamformer to treat it as a legacy obs, if you want to beamform from the .dat files produced by the offline PFB.]
| Code Block | ||||
|---|---|---|---|---|
| ||||
$ cd /astro/mwavcs/vcs/1318345216/vcsbeam
$ echo "00:34:08.8703 -07:21:53.409" > pointings.txt
$ sbatch vcsbeam.sbatch |