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ratt-ru / simms

Creates empty measurement sets using the the CASA simulate tool.
GNU General Public License v2.0
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optimize start time result in a observation that is centred off the meridian #53

Closed bennahugo closed 7 months ago

bennahugo commented 4 years ago

Not a big problem, but this source is not centred correctly. My guess is the time is not specified in the UTC meridian time. The command is as follows:

simms -f0 1350MHz -df 0.02612304688MHz -nc 3829 -n mk64.32k.1350.1450.30s.ms -st 1.5 -dt 30.0 --tel meerkat -dir "J2000,04h08m20.37884s,-65d45m09.0806" -os
2019/9/17 15:54:18

Resulting in a header as follows

2019-09-17 14:02:11     INFO    listobs::ms::summary+      ObservationID = 0         ArrayID = 0
2019-09-17 14:02:11     INFO    listobs::ms::summary+     Date        Timerange (UTC)          Scan  FldId FieldName             nRows     SpwIds   Average Interval(s)    ScanIntent
2019-09-17 14:02:11     INFO    listobs::ms::summary+     17-Sep-2019/03:00:47.4 - 04:30:47.4     1      0 00                      362880  [0]  [30] [OBSERVE_TARGET.ON_SOURCE]
2019-09-17 14:02:11     INFO    listobs::ms::summary               (nRows = Total number of rows per scan)

The resulting source is off meridian as computed with pyephem: image

bennahugo commented 7 months ago

Believe this is fixed. Stale