Postgastro is an effort to move most of ARI's astrometry-related FORTRAN-code
to C extensions for postgresql.

To install the stuff, say, in the project root:

make
sudo make install
psql <your-db-name> < postgastro.sql

The following functions are provided:

* celDistDD(alpha0, delta0, alpha1, delta2), celDistDP(alpha0, delta0, point),
	celDistPP(point1, point2) -- returns the great circle distance in degresse
  for the given positions.  All values must be in degrees.
* movePM(alpha, delta, pmAlpha, pmDelta, fromEpoch, toEpoch) -- returns 
  the position (as a point) of an object at alpha and delta at fromEpoch
  with pmAlpha, pmDelta at that epoch for toEpoch.  The position must be in 
  degrees, the proper motion in deg/yr.
* movePMAndPm(alpha, delta, pmAlpha, pmDelta, fromEpoch, toEpoch) -- returns 
  the proper motion for an object at alpha, delta with PM (pmAlpha,pmDelta)
  at fromEpoch at toEpoch.  The PM is returned in deg/yr in a point,
  with cos(delta) applied.

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