[daip] Hour angle calculation
Eric Greisen
egreisen at nrao.edu
Wed Mar 9 17:23:25 EST 2005
Andy Biggs writes:
> Hi there. I've been calculating Hour Angles today for a multi-epoch
> dataset. As a check I've been comparing my values with those that AIPS
> reports. I've noticed that whilst the x-axis in UVPLT (BPARM = 14,0) gives
> results that agree very well with mine, that in SNPLT does not (plotting
> with XAXIS=3). Am I misinterpreting Hour Angle in the SNPLT case?
>
You are quite right. The SNPLT used a home brew routine rather than
the one more generally used and someone multiplied the station
longitudes
STNLON(ANTNO) * 1.002738D0
which is not correct. It is repaired as of tomorrow in 31DEC05.
Thanks,
Eric Greisen
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