This directory contains support files that are used by xephem. These files are
only ever read by xephem and so may be shared by all users.

xephem.hlp	Help text
xephem_sites	Earth sites
mars.fts	Mars image
fullmoon.fts	Full moon image
moon_db		Lunar sites
ppm.xe		PPM catalog in special compressed binary format

The gsccache directory is for the Hubble Guide Star Catalog. You can build it
up gradually using xephem itself or you can load it all at once using the
gscload utility in ../tools.
