At the NEAT site on Haleakala, Maui the telescope can be moved in right
ascension, a limited range of declination, and in azimuth.  This is
leftover from the use of this telescope as a satellite tracker - the
idea was to align the telescope polar axis (nominally right ascension)
with the instantaneous pole of a satellite's orbit.

Since the declination range has mechanical limits, the only way to
search in the south is to rotate the azimuth to 90 degrees so that the
right ascension and declination axis are interchanged. Intermediate
azimuth's also may be of interest.

Changing the azimuth away from zero will also rotate the field. We want
to know how to determine the field rotation based on the knowledge of
the azimuth setting and the target hour angle and declination.  We were
given transformation routines by Steve Pravdo of NEAT, but he didn't
understand all the inputs, the values of intermediate values, or the
output. Michael Wood-Vasey and I made a first attempt at deconstructing
the code, but it didn't seem to work.  Pravdo also supplied us with
some images taken at non-zero azimuth.

Therefore, the project is to either deconstruct the code we were given
or determine the mapping ourselves based on images taken with different
azimuth values.

Michael-Wood Vasey can be contacted to obtain the transformation code
and the sample images (taken on June 2, 2000). Note that the transformation
code is in /home/lilys/wwoodvas/NEAT/msss/Applications ; see mapaz.m
for an example.