KPL/SCLK BepiColombo MMO Spacecraft SCLK File -- TEST DATA -- FICTIONAL =========================================================================== This file is a SPICE spacecraft clock (SCLK) kernel containing information required for the BepiColombo Mercury Magnetospheric Orbiter (MMO) spacecraft on-board clock to UTC conversion. This file contains the data necessary for converting from ET to ticks for the FICTIONAL MMO spacecraft clock (clock ID code 68) 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 0.0 -- Feburary 28, 2017 -- Marc Costa Sitja, ESAC/ESA Initial release. Production/History of this SCLK file -------------------------------------------------------- This file has been manually created by Marc Cosat Sitja (ESAC/ESA) and contains FICTIONAL DATA. It is intended ONLY for study purposes. NO DATA ANALYSIS SHALL BE PERFORMED BASED ON THIS FILE. This SCLK kernel is intended to be used with test CK files with structure IDs listed below on board the spacecraft -68 (MMO): Name NAIF ID ====================== ========= MMO_SPACECRAFT -68000 Usage -------------------------------------------------------- This file is used by the SPICE system as follows: programs that make use of this frame kernel must "load" the kernel normally during program initialization. Loading the kernel associates the data items with their names in a data structure called the "kernel pool". The routine that loads a kernel into the pool is shown below: FORTRAN: (SPICELIB) CALL FURNSH ( frame_kernel_name ) C: (CSPICE) furnsh_c ( frame_kernel_name ); IDL: (ICY) cspice_furnsh, frame_kernel_name MATLAB: (MICE) cspice_furnsh ( 'frame_kernel_name' ) PYTHON: (SPICEYPY)* furnsh( frame_kernel_name ) This file must be loaded into the user's program in order to use the SPICE SCLK family of subroutines to convert MMO FICTIONAL spacecraft on-board clock to ET and vice versa. This file was created and may be updated with a text editor or word processor. * SPICEPY is a non-official, community developed Python wrapper for the NAIF SPICE toolkit. Its development is managed on Github. It is available at: https://github.com/AndrewAnnex/SpiceyPy SCLK Format -------------------------------------------------------- The on-board clock, the conversion for which is provided by this SCLK file, consists of two fields: P/SSSSSSSSSS:FFFFF where: P/ -- optional partition identifier SSSSSSSSSS -- count of on-board seconds (32 bits) FFFFF -- count of fractions of a second (16 bits) References -------------------------------------------------------- 1. SCLK Required Reading Document 2. MAKCLK User's Guide Document 3. SFOC SCLKvSCET SIS Document 4. BepiColombo Space-to-Ground ICD, BC-ASD-IF-00019, volume 2 5. BepiColombo OBC HW/SW ICD, BC-TAM-IF-00002 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 2016-JULY-12-00:01:08.184. Thus 1/288929292.8201 simply represents the epoch that occurs 288929292.12514 TDB seconds past the ET epoch 2016-JULY-12-00:01:08.184. For all time, the clock runs at the same rate as TDB. There is only one partition for this clock. \begindata SCLK_KERNEL_ID = ( @2017-02-28/18:02:00 ) SCLK_DATA_TYPE_68 = ( 1 ) SCLK01_TIME_SYSTEM_68 = ( 2 ) SCLK01_N_FIELDS_68 = ( 2 ) SCLK01_MODULI_68 = ( 4294967296 65536 ) SCLK01_OFFSETS_68 = ( 0 0 ) SCLK01_OUTPUT_DELIM_68 = ( 1 ) SCLK_PARTITION_START_68 = ( 0.0000000000000E+00 ) SCLK_PARTITION_END_68 = ( 1.0995116277750E+18 ) SCLK01_COEFFICIENTS_68 = ( 0.0000000000000E+00 @2016-07-12T00:01:08.184 1.0000000000000E+00 ) \begintext End of SCLK file.