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20021103 report
Pointing model OK, rms errors 2" in az & el
With SCUBA unavailable and the weather fine and stable, RxB has been
much in use. The last 3 nights' pointing data are shown below, aligned
by their individual (nightly) collimations :
Data are lacking from quadrant 1, but the total of
59 data have raw rms scatters in (daz,del) of (2.0", 2.3"), and if
the most deviant datum (of Mars just after dawn on the 3rd night)
is removed the remaining 58 data have rms's of (1.8", 2.1").
Running these data through the FIT7 program indicates little room
for improvement in the model : fitted data have rms's of (1.7", 2.1")
Iain Coulson
Latest Update : 04 Nov 2002
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