... The NAIF IDS required reading lists all default ID-name mappings for the SPICE/CSPICE toolkits and a description of functionality of the corresponding software. SPICE system kernel files and subroutines refer to ephemeris objects, reference frames, and instruments by integer codes. ... bodn2c_c ( name, , ); boddef_c performs a run-time assignment of a name/code mapping for later translation by bodc2n_c and bodn2c_c: . ... THE SPICE convention uses negative integers as spacecraft ID codes. ...