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20020602 report
Pointing model updates
69 data were collected on June 02 :
A strong trend of del -vs- elevation appears (centre panel),
which was not present in data from
a week ago.
The new data were reduced using TPOINT
and a new model installed at ~16:00 HST on 03 June.
The change in behavious was identified by Nick Rees as occurring
on 29 May - the day of the SCUBA fore-optics removal-&-replacement.
Collimations differences may be expected for the other receivers
from this time.
Subsequent datasets of 17 and 28 SCUBA pointings, resp., taken on the
next two nights are shown below :
- (One extremely deviant pointing on 1044+719 at ~18:30 HST on the 04th
has been discarded.)
Typical raw rms residuals in (daz,del) would seem to be (1.8", 1.8").
Iain Coulson
Latest Update : 05 Jun 2002
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