This directory contains the NOVAS code as downloaded from 
http://aa.usno.navy.mil/AA/, plus FORTRAN subroutines jpleph.f and
init.f. The former is extracted from testeph.f as supplied by JPL
with two modifications in subroutine FSIZER3 (see lower case code)
as to the name and location of the ephemeris file. Subroutine init.f
implements the subroutine referenced in jpleph.f and a subroutine
called by oyster to initialize the ephemeris file location.

The Makefile (or files) are to compile the NOVAS code for use in oyster.

Change (2007-06-26): we use D. Buscher's C version of jpleph
to avoid the FORTRAN code. We modified solsys2.c to replace the call
to jplint with a call to pleph.

Change (2008-04-02): we find that jpleph.c must have a bug because the
Sun's position is not computed properly. We now revert to the version
using solsys3.c, which does not require an ephemeris. The only disadvantage
is that we cannot compute the position of the Moon anymore, but for this
a function of the idlastro library can be used.
