This directory contains an ASCII text copy of a paper describing the NAIF
SPICE system.

key files:
  INFO.TXT     - (this file) describes directory contents
  SPICE.ASC    - ASCII text version of [ACTON1994]

SPICE users may also wish to refer to the article [ACTON1996]:

    Acton, C.H., Ancillary Data Services of NASA's Navigation and
    Ancillary Information Facility, Planet. Space Sci., Vol. 44,
    No. 1, pp. 65-70, 1996. (Reference Key ID: ACTON1996)