JUNO CK Files =========================================================================== This ``aareadme.txt'' file describes contents of the kernels/ck directory of the JUNO SPICE data server. It was last modified on January 6, 2010. Contact Chuck Acton (818-354-3869, Chuck.Acton@jpl.nasa.gov) or Boris Semenov (818-354-8136, Boris.Semenov@jpl.nasa.gov) if you have any questions regarding this data. Brief summary -------------------------------------------------------- This directory contains the SPICE C-Kernel files for the JUNO spacecraft, its structures, and science instruments. Naming Scheme -------------------------------------------------------- The naming scheme for JUNO CKs is: juno_INST_TYPE_YYMMDD_YYMMDD[_EXTRA]_vNN.bc where INST structure identifier (required): sc for spacecraft sa for solar arrays asc1 for ASC1 asc2 for ASC2 asc3 for ASC3 asc4 for ASC4 sc2asc for spacecraft-to-ASC alignment asc2mob for ASC-to-MOB alignment uvs for UVS TYPE data type identifier (required): nom for nominal data based on planned attitude profile nom* for nominal for a particular position (e.g. nom0, nomp30, nomm30, etc.) prl for long-term prediction, made from .drf delivered five weeks in advance covering two orbits prs for short-term prediction, made from .drf delivered eight days in advance covering one orbit raw for telemetry-based (the need, frequency, and coverage are TBD) rec for reconstruction, based on .drf delivered up to seven days later covering one orbit tst for test data YYMMDD coverage start and stop UTC/SCET (required); EXTRA additional information token (optional; e.g. _tcm1); NN version number (required); To comply with this naming scheme, the nominal CK files released in 2009 were renamed on 10/01/06 as follows (only files names are shown; extensions are .bc for both the old and the new names): juno_asc_to_mob_nom_v1 -> juno_asc2mob_nom_110801_171101_v01 juno_nom_090202 -> juno_sc_nom_110807_171016_v01 juno_sa_zero -> juno_sa_nom_110801_171101_v01 juno_sc_to_asc_nom_v1 -> juno_sc2asc_nom_110801_171101_v01 juno_uvs_nom_0_v1 -> juno_uvs_nom0_110801_171101_v01 juno_uvs_nom_m30_v1 -> juno_uvs_nomm30_110801_171101_v01 juno_uvs_nom_p30_v1 -> juno_uvs_nomp30_110801_171101_v01 Kernel File Details -------------------------------------------------------- The most detailed description of the data in a binary CK file is provided in metadata included inside the comment area of the file. This information can be viewed using the utility programs COMMNT and SPACIT included in the NAIF Toolkit. For some CKs the contents of the comment area were extracted and saved in a companion text file with the extension ``cmt''. CK Label Files. Detached label files have the same names as the corresponding CK files with the additional extension ".lbl" appended at the end. For all CK files these labels are NOT PDS or SFDU labels; instead they contain the contents of the files' comment areas.