[evlatests] Flagging/moving from P to C bands ...

Jim Ulvestad julvesta at nrao.edu
Mon Jul 2 22:33:09 EDT 2007


Going the long way around is 239 degrees, which should take
almost exactly 6 minutes.

Are you sure the start azimuth wasn't -48 deg., just reported
modulo 360?

Jim

>
>     My file observed 3c147 at P-band, then moved to a different source
> for the C-band observation.  JObserve reported that this move should
> take 3min, 24 seconds.  But in fact, it took nearly 6 minutes for good
> C-band data to appear.    This is for most of the antennas -- some took
> a few seconds longer.
>
>     For those who distrust JObserve, here are the beginning and ending
> azimuths and elevations:
>        Start AZ:  312
>        End Az:   191
>
>     Start El:      29
>     End El:       56.
>
>     The slew time will be set by the azimuth move -- 120 degrees, which
> at 40 deg/min should take 3 minutes.
>
>     So -- what were the antennas doing for that extra 2.5 minutes?  The
> unflagged data shows nothing but noise...
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