April 7, 1999: The manual refers to the dither pattern as lauer.dat.
That pattern was devised to correct for the bad columns in the engineering
CCDs. With the new CCDs, we are using the dither pattern referred to as
todd.dat, shown below:
# Todd Boroson's canned dither scheme for the NOAO mosaic
# Offset relative to current telescope position
# RA (pixels) Dec (pixels)