20010626 report
Allsky Pointing & Transit tracking on g343.0 (el*=27)
Summary
The weather wasn't really good enough for these tests of the
recently installed corrective algorithm.
As a result neither experiment was definitive, and the algorithm and
the pointing model remain unchanged.
The tracking experiment on g343.0 (el*=27) is shown below
The seeing was reported as about 0.3". The elevation data show a
-3" step at transit : although close inspection
reveals it to have occurred somewhat earlier, possibly casting some doubt
on the more obvious interpretion that the algorithm has overcorrected the
'transit' problem.
The allsky pointing is shown below :
The data show no obvious systematic problems with the model, but with
such large rms scatters (2" & 3") there is little that can be done with
the data. The reported seeing of ~0.3" clearly underestimates all the
atmospheric effects occurring tonight.
Repeats of both these experiments will be necessary.
Iain Coulson
Latest Update : 27 Jun 2001
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