Ancillary data services of NASA's Navigation and Ancillary Information Facility

JPL's Navigation and Ancillary Information Facility (NAIF) has primary responsibility for design and implementation of the SPICE ancillary information system, supporting a wide range of space science mission design, observation planning and data analysis functions. NAIF also serves as the ancillary data node of the Planetary Data System (PDS). As part of the PDS, NAIF archives SPICE and other ancillary data produced by flight projects. NAIF then distributes these data, and associated data access software and high-level tools, free of charge, to researchers funded by NASA's Office of Space Science, and to the broader space science community to the extent NAIF resources and NASA and JPL policy permit. This paper describes the SPICE system, identifies current and future SPICE applications, and summarizes customer support offered by NAIF. This information is current as of Spring 1995.