Tilt data from 04/08/00, tracking NGC 6334.
This is all of the binned data. Note the dip in the declination. It would
seem a better idea to fit the curve without that:
This is the data used in the table of SPOs. The ongoing mystery is why the
90 degree offset between RA and declination is in the opposite direction
from all of the later data. (look at the table)
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.
Added by Tim on 7/18/00