KPL/SCLK

INSIGHT SCLK File Implementing LMST at ops181206 Landing Site
===========================================================================

     This file is a SPICE spacecraft clock (SCLK) kernel implementing
     Local Mean Solar Time (LMST). This file contains information
     required to convert between Ephemeris Time (ET) and LMST at the
     INSIGHT landing site ops181206 (actual site based on the MRO
     HIRISE image taken on Dec 6, 2018) for the landing date/time
     2018-11-26T19:44:52.444 using SPICE SCLK time conversion
     routines/tools.


Version
--------------------------------------------------------

     1.0.0 -- December 17, 2018 -- BVS/NAIF

         Initial Release.


References
--------------------------------------------------------

     1. SCLK Required Reading Document


Implementation Details
--------------------------------------------------------

     LMST for INSIGHT at the landing site ops181206 and landing date/time
     2018-11-26T19:44:52.444 can be represented by a simple linear
     function.

     The starting point for this function is 2018-11-26T05:10:50.3356
     UTC (or 596481119.519 ET seconds past J2000) corresponding to the
     midnight LMST of the SOL 0 for the *target* landing site 2016e09o
     (longitude 135.97 deg). The project chose to continue using this
     epoch rather than adjusting it to correspond to the actual site
     (longitude 135.623447 deg) to minimize impact on operations.

     This function "runs" at the constant rate of 1.02749125 ET
     seconds in 1 local Martian second, which is equal the SCLK rate of
     88775.24400000 ET seconds in 1 local Martian day that appears in
     the COEFFICIENTS keyword below.

     The ID for this clock is chosen to be 189900 to indicate that
     this is NOT an actual SCLK for the INSIGHT on-board clock but a
     special SCLK file that enables LMST-ET time conversions using the
     APIs of the SCLK subsystem of SPICE.


LMST Format
--------------------------------------------------------

     The LMST string, the conversion for which is provided by this SCLK
     file, consists of four fields:

          DDDDD:HR:MN:SC:TMSEC

     where:

          DDDDD -- count of LMST (SOL) days (0..36525)
          HR    -- count of LMST hours (0..23)
          MN    -- count of LMST minutes (0..59)
          SC    -- count of LMST seconds (0..59)
          TMSEC -- count of LMST 10-microsecond ticks (0..99999)

Usage
--------------------------------------------------------

     In order to use the SPICELIB SCLK family routines to convert
     INSIGHT LMST at the landing site ops181206 to ET and vice versa,
     this file must be loaded into the user's program by a call to the
     FURNSH routine

          CALL FURNSH( 'this_file_name' )            (FORTRAN)
          furnsh_c   ( "this_file_name" );           (C)
          cspice_furnsh, 'this_file_name'            (IDL)
          cspice_furnsh( 'this_file_name' )          (MATLAB)

     Once loaded, the routine SCE2S can be used to convert an ET time
     to an LMST string in the format DDDDD:HR:MN:SC:TMSEC:

          CALL SCE2S( -189900, ET, LMST )             (FORTRAN)
          sce2s_c   ( -189900, et, maxlen, lmst );    (C)
          cspice_sce2s, -189900, et, lmst             (IDL)
          lmst = cspice_sce2s( -189900, et );         (MATLAB)

     and the routine SCS2E can be used for backward conversion -- from
     LMST in DDDDD:HR:MN:SC:TMSEC format to ET:

          CALL SCS2E( -189900, LMST, ET )             (FORTRAN)
          scs2e_c   ( -189900, lmst, &et );           (C)
          cspice_scs2e, -189900, lmst, et             (IDL)
          et = cspice_scs2e( -189900, lmst )          (MATLAB)


Inquiries
--------------------------------------------------------

     If you have any questions regarding this file contact NAIF at JPL

           Charles H. Acton, Jr
           (818) 354-3869
           Chuck.Acton@jpl.nasa.gov

           Boris V. Semenov
           (818) 354-8136
           Boris.Semenov@jpl.nasa.gov


Kernel DATA
--------------------------------------------------------

     \begindata

         SCLK_KERNEL_ID              = ( @2018-12-17-08:52:39 )

         SCLK_DATA_TYPE_189900        = ( 1 )
         SCLK01_TIME_SYSTEM_189900    = ( 1 )
         SCLK01_N_FIELDS_189900       = ( 5 )
         SCLK01_MODULI_189900         = ( 36525 24 60 60 100000 )
         SCLK01_OFFSETS_189900        = ( 0     0  0  0  0  )
         SCLK01_OUTPUT_DELIM_189900   = ( 2 )

         SCLK_PARTITION_START_189900  = ( 0.00000000000000E+00 )

         SCLK_PARTITION_END_189900    = ( 3.15576000000000E+14 )

         SCLK01_COEFFICIENTS_189900   = (
             0.0000000000000E+00     596481119.519    88775.24400000
                                  )

     \begintext