KPL/SCLK Bepi-Colombo MPO Spacecraft SCLK File FICTIONAL =========================================================================== This file is a SPICE spacecraft clock (SCLK) kernel containing information required for the BepiColombo Mercury Planetary Orbiter (MPO) spacecraft on-board clock to UTC conversion. This file contains the data necessary for converting from ET to ticks for the FICTIONAL MPO spacecraft clock (clock ID code 121) This is intended for study purposes or for those situations in which a clock is not available for the structure whose orientation will be modelled by a C-kernel. Production/History of this SCLK file -------------------------------------------------------- Version 0.2 -- October 19, 2018 -- Marc Costa Sitja, ESAC/ESA Generated new Fictional SCLK to align it with the preliminary step SCLK. Version 0.1 -- July 05, 2016 -- Marc Costa Sitja, ESAC/ESA Updated the file text. Version 0.0 -- December 22, 2014 -- Jonathan McAuliffe, ESAC/ESA Initial release. Usage -------------------------------------------------------- This file must be loaded into the user's program by a call to the FURNSH subroutine CALL FURNSH ( 'this_file_name; ) -- FORTRAN furnsh_c ( "this_file_name" ); -- C cspice_furnsh, 'this_file_name' -- IDL cspice_furnsh( 'this_file_name' ) -- MATLAB spiceypy.furnsh( 'this_file_name' ) -- PYTHON in order to use the SPICELIB SCLK family of subroutines to convert MPO_SPACECRAFT spacecraft on-board clock to ET and vice versa. SCLK Format -------------------------------------------------------- The on-board clock, the conversion for which is provided by this SCLK file, consists of two fields: SSSSSSSSSS.FFFFF where: SSSSSSSSSS -- count of on-board seconds FFFFF -- count of fractions of a second with one fraction being 1/65536 of a second; normally this field value is within 0..65536 range. References -------------------------------------------------------- [1] SCLK Required Reading Document [2] TIME Required Reading Document [3] KERNEL Pool Required Reading Document [4] "BepiColombo OBC HW/SW ICD, BC-TAM-IF-00002'' Contact Information -------------------------------------------------------- If you have any questions regarding this file contact SPICE support at ESAC: Marc Costa Sitja (+34) 91-8131-457 mcosta@sciops.esa.int, esa_spice@sciops.esa.int or NAIF at JPL: Boris Semenov (818) 354-8136 Boris.Semenov@jpl.nasa.gov Kernel DATA -------------------------------------------------------- This SCLK file is constructed so that the valid SCLK strings are simply the number of TDB seconds that have passed since the Ephemeris epoch 2022-MAY-31-23:59:59.999. Thus 1/288929292.8201 simply represents the epoch that occurs 288929292.12514 TDB seconds past the ET epoch 2022-MAY-31-23:59:59.999. For all time, the clock runs at the same rate as TDB. There is only one partition for this clock. \begindata SCLK_KERNEL_ID = ( @2018-10-17/00:00:00.000000 ) SCLK_DATA_TYPE_121 = ( 1 ) SCLK01_TIME_SYSTEM_121 = ( 2 ) SCLK01_N_FIELDS_121 = ( 2 ) SCLK01_MODULI_121 = ( 4294967296 65536 ) SCLK01_OFFSETS_121 = ( 0 0 ) SCLK01_OUTPUT_DELIM_121 = ( 1 ) SCLK_PARTITION_START_121 = ( 0.0000000000000E+00 ) SCLK_PARTITION_END_121 = ( 2.8147497671065E+14 ) SCLK01_COEFFICIENTS_121 = ( 3.9616343315699E+13 @1989-02-26/11:58:02.576 9.9997831858461E-01 ) \begintext End of SCLK file.