MER SPK files.
===========================================================================
 
     This ``aareadme.txt'' file describes contents of the kernels/spk
     directory of the MER SPICE data server. It was last modified on June
     28, 2013. 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 SP-Kernel files for the MER cruise
     vehicles, landing sites, rovers, and rover structures. All binary
     files are in IEEE binary format and suitable for ftp binary transfer
     to use on UNIX workstations and MACs. The following files are present
     in this directory. (Only file names are shown; the file name
     extensions of the binary SPK files are always ``.bsp'', for transfer
     format SPK files are always ``.xsp'')
 
 
Landing Site SPK files:
 
     Most current landing site SPK files are:
 
        mer1_ls_040128_iau2000_v1.bsp
        mer2_ls_040108_iau2000_v1.bsp
 
     Note: all landing site SPK files should be used together with a PCK
     file implementing MARS IAU 2000 rotation model, mars_iau2000_v0.tpc.
 
 
Rover Surface Path SPK Files
 
     Most current rover surface path SPK files:
 
        mer1_surf_rover.bsp
        mer1_surf_rover_cs.bsp
        mer1_surf_rover_ro.bsp
        mer1_surf_roverrl.bsp
        mer1_surf_roverrl_sc.bsp
        mer1_surf_roverrl_ro.bsp
 
        mer2_surf_rover_all_v01.bsp
        mer2_surf_rover_ro_v01.bsp
        mer2_surf_roverrl_all_v01.bsp
        mer2_surf_roverrl_ro_v01.bsp
 
     The rover path SPK file naming is:
 
           mer[1,2]_surf_rover[_TT][_vVV]     The latest MER surface path
                                              SPK files based on
                                              telemetered position only.
 
           mer[1,2]_surf_roverrl[_TT][_vVV]   The latest MER surface path
                                              SPK files based on adjusted
                                              location from OSU combined
                                              with telemetered position
                                              data.
 
     The files with no suffix TT are the ever-growing, current SPKs
     covering from landing to today, updated daily.
 
     The files with the suffix TT set to ``all'' are the final SPKs
     covering from landing to the end of the mission.
 
     The files with the suffix TT set to ``cs'' are the current SPKs
     covering the last three sites only, updated daily.
 
     The files with the suffix TT set to ``ro'' are the current SPKs for
     most recent available rover position covering from now or the end of
     the mission far into the future, updated daily.
 
     The files with the suffix TT set to ``prim'' or ``ext*'' are the
     archived three-month chunks of the current ever-growing SPKs; they are
     superseded by the current ever-growing SPKs and are provided only for
     the record.
 
 
Rover Fixed-at-LS SPK Files
 
     Most current rover ``fixed at the landing site'' SPK files used in
     CHRONOS setups are:
 
        mer1_still_at_ls_v1.bsp
        mer2_still_at_ls_v1.bsp
 
 
Gravity-compensated IDD Position SPK Files
 
     Most current gravity-compensated IDD position SPK files:
 
        mer1_surf_iddg.bsp
        mer1_surf_iddg_prim_v1.bsp
        mer1_surf_iddg_ext*_v1.bsp
 
        mer2_surf_iddg_all_v1.bsp
 
 
Rover Structures SPK Files
 
     Most current rover structures SPK files:
 
        mer1_struct_ver11.bsp
        mer2_struct_ver11.bsp
 
 
Cruise SPK Files
 
     Most current cruise SPK files:
 
        mer1_cruise.bsp
        mer2_cruise.bsp
 
 
EDL SPK Files
 
     Most current EDL SPK files:
 
        mer1_edl_rcb_v1.bsp
        mer2_edl_rcb_v1.bsp
 
 
Generic SPK Files
 
     Generic SPK files:
 
           de410                              Generic planet ephemerides
                                              SPK file.
 
           mar033*                            Martian satellite ephemerides
                                              SPK files.
 
 
Detailed Information Regarding Individual SPK Files.
--------------------------------------------------------
 
     Detailed information for each SPK file is provided in the comments
     area of the file and can be viewed using SPICE utilities COMMNT and
     SPACIT.