[evlatests] planet tracking test last thursday

Ken Sowinski ksowinsk at nrao.edu
Mon Oct 29 19:16:06 EDT 2007


On Mon, 29 Oct 2007, Bryan Butler wrote:
>
> i did a planet tracking test last thursday.

> now, there were problems starting this file up - first i sent a
> malformed script, then a wierd thing happened with the operator's
> interface, so the operator (after talking to rich) aborted the script
> and restarted it.  basically things didn't really start properly
> observing until scan #6.

> i can say that this observation was a spectacular failure.  there is no
> properly correlated data except on a single scan - the first of the
> venus calibrator scans.


I had a look at the archive to see what was happening.
One of the methods produced totally bogus positions
so that the antennas spent all their time chasing
around the sky.  So much so that there was not enough
time in calibrator scans for them to get back.  This
is verified by the fact that the most antennas were
flagged as off source most of the time.

I did not try to look at the record closely enough to see
which method failed.  I don't know that the other was
correct, but at least it produced plausible positions
for Venus and Mars that were near the calibrators.


We have made plans for what to do with SW time on Tuesday.
Barry, if you want to do anything with this tomorrow be
my guest.

I have preserved the 'f10' output during Bryan's test if
anyone wants to look at it more carefully.




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