May 2002 This directory contains any data files which are used by procedures in the IDL astronomy library. These procedures look for these data files in a directory with the logical name ASTRO_DATA (VMS) or the environment name ASTRO_DATA (Unix). As of May 2002, this directory contains two files 1. JPLEPH.405 - FITS file contain the JPL DE405 ephemeris (chebychev polynomials based upon the International Celestial Reference Frame (ICRF). Because of the size of this file it is not distributed along with the standard IDL Astronomy Library tar or zip files. 2. testpo.405 -- an ASCII file containing sample ephemeris test data for use the IDL jpl* ephemeris procedure Because of the large size of JPLEPH.405 and testpo.405 they are not included with the IDL Astronomy Library .tar or .zip files. Users who need these files should instead fetch them from ftp://idlastro.gsfc.nasa.gov/pub/data An earlier file ebcasc.dat, which was read by STREBCASC.PRO (giving the EBCDIC-ASCII conversion codes is still available in the ftp://idlastro.gsfc.nasa.gov/pub/obsolete directory.
