############################################################################ #_Title S04_kernels.def - List of Cassini NAIF SPICE kernels # #_Desc S04_kernels.def contains a list of all the NAIF SPICE kernels # relevant to the Cassini cameras. This file is referred to # in all ISIS Cassini applications that require such # information. It should contain a list of all files required to # determine spacecraft telemetry, orientation, timing, and all # details relating to the operation of the cameras and platform # at any time during the mission. # # In order to get proper spacecraft navigation and instrument # orientation there are certain files that must be referenced. # We use SPICE kernels provided by NAIF. They provided a robust # software system library that accesses these data to get all # necessary ephemeris data for an instrument at given time. The # SPICE software library loads the appropriate files and then is # able to provide "snapshots" of spacecraft location and instrument # platform orientation to resolve pointing geometry. # # The NAIF software system requires at least (and, sometimes, # at most) 1 type of the following files: # # Leap Seconds file - .tls file # Planetary Constants - .tpc file # Spacecraft Clock Count - .tsc file # Instrument Mount Kernel - .ti fle # Planetary Ephemerides - .bsp fle # # These files are located under the "Standard Kernels" section. # There should be no more that one of these types of file loaded # from this section (i.e., no files with the same file extension). # # What remains is to load the dowlinked telemetry from the mission # spacecraft. These will be a series of SPK or SPacecraft Kernels # and CK, Camera Kernels. This file is created for the Cassini # mission and the ISS instruments on that spacecraft. It has # specific SPK and CK file that are designed to parallel one another # in time/phase of the mission. There, generally, can be any number # of these files as long as the system maximum is not exceeded. # # Note that the order SPICE kernels are loaded into the NAIF software # system is important. Typically, the last file loaded of a given # type takes precedence of previous files loaded of the same type. # The software will not attempt to load any files that do not exist # so you can list all the anticipated kernels in this file without # having to change it. To add a new kernel, simply make a copy of # of this file and append newer time coverage files to the end of # appropriate section or end of the file. Filenames may contain # environment variables or full pathes to them. ISIS uses environment # variables to allow for distribution with the software. # #_KEYS NAIF, SPICE, KERNEL, GEOMETRY # #_End ############################################################################ ############################################################################ # Standard kernels: leapseconds, PCK, Frame kernel # the process. There should only be one occurance of each of these file. ############################################################################ /usr/local/naif/kernels/naif0007.tls /usr/local/naif/kernels/cpck21Jun2004.tpc /usr/local/naif/kernels/ik/cas_v37_vims.tf ############################################################################ # SCLK kernels ############################################################################ /usr/local/naif/kernels/cas00085.tsc ############################################################################ # Spk kernels. Cassini spacecraft kernels that provided coverage during a # specific time in the mission. Note that all or one of these can be # loaded. These file give telemetry information about the Cassini # spacecraft during its orbit around a target. ############################################################################ /usr/local/naif/kernels/spk/ephem/sat128.bsp /usr/local/naif/kernels/spk/ephem/sat164.bsp /usr/local/naif/kernels/spk/tour/KERNELS/040622BP_SCPSE_04122_08222.bsp ############################################################################ # Ck kernels. It is best to use reconstructed C kernels here. # Predict kernels are less accurate. ############################################################################ /usr/local/naif/kernels/ck/new_names/04256_04292pd_S4_psiv2.bc