SPICE data produced by NAIF are offered through
this web site. This includes formally archived data sets, operations
data from active missions, generic kernels, and some pre-SPICE-era data that have been "restored" into SPICE formats.
SPICE data produced by other NASA centers and archived with the NAIF node of the
PDS are also available here.
Mission operations SPICE data produced by ESA (ESAC) for Mars Express (MEX),
Venus Express (VEX) and Rosetta are mirrored here. Once
archival SPICE data sets are produced for these missions, those will also be
available here in addition to being available from the primary location in
ESA's Planetary Science Archive (PSA).
NAIF has some additional SPICE data that are undergoing restoration—pieces
of which may be available.
if you have questions about availability of ancillary data not posted
under the "Data" section of this site.