Tilt data from 05/09/00, tracking RCW 57.
The data is fit to a sine function of the form
SPO = average + amplitude*sin(2*pi(t + phase))
(note the sign on the phase, which may be opposite what you're used to).
The "arb-az" given is the location in arbitrary-az of the point (1-phase),
i.e. where sin = 0 and cos = 1.
A table of all SPOs can be found here.
Here are the residuals for this data:
The black lines are at 0 (the mean of the residuals is almost exactly 0),
and the dotted lines are at 1 and 2 sigma. It would appear that there are
no residuals greater than about 1 arcminute, which implies that if we can
get SPARO following the SPO curve, we should be pointing well enough given
our ~5' beam size.
Added by Tim on 07/18/00