KPL/SCLK JUICE SCLK File by ESA SPICE Service =========================================================================== This file is a SPICE spacecraft clock (SCLK) kernel containing information required for the JUpiter ICy moons Explorer (JUICE) spacecraft on-board clock to UTC conversion. This file contains the data necessary for converting from ET to ticks for the JUICE spacecraft clock (clock ID code 28) 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. Version and Date ----------------------------------------------------------------------------- Version 0.3 -- November 24, 2021 -- Ricardo Valles Blanco, ESAC/ESA Updated comments and contact information. Version 0.2 -- June 04, 2016 -- Marc Costa Sitja, ESAC/ESA Updated all NAIF ID codes from -907* to -28* since the JUICE spacecraft NAIF ID has been updated from -907 to -28. Updated filename following the convention described in ``ESA-SCI-SPICE-SRS-0003_Cross_Mission_Filename_Convention'' Version 0.1 -- May 12, 2016 -- Jorge Diaz del Rio, ODC Space Included JUICE_RIME, JUICE_MAG_BOOM and JUICE_RPWI_LBPx frames in the list of test CKs to be used with this file. Updated comments. Version 0.0 -- March 26, 2016 -- Jorge Diaz del Rio, ODC Space Initial release. Production/History of this SCLK file ----------------------------------------------------------------------------- This file has been manually created by Jorge Diaz del Rio (ODC Space) 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 -28 (JUICE): Name NAIF ID ====================== ========= JUICE_SPACECRAFT -28000 JUICE_SA+Y -28011 JUICE_SA-Y -28013 JUICE_MAG_BOOM -28031 JUICE_MAJIS_SCAN -28401 JUICE_RIME -28601 JUICE_RPWI_LBP1 -28701 JUICE_RPWI_LBP2 -28711 JUICE_RPWI_LBP3 -28721 JUICE_RPWI_LBP4 -28731 JUICE_SWI_SCANNER -28810 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' ) This file must be loaded into the user's program in order to use the SPICE SCLK family of subroutines to convert JUICE 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. 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..65535 range. References ---------------------------------------------------------------------------- 1. SCLK Required Reading Document 2. TIME Required Reading Document 3. KERNEL Pool Required Reading Document Inquiries and Contact Information ----------------------------------------------------------------------------- If you have any questions regarding this file contact the ESA SPICE Service (ESS) at ESAC: Alfredo Escalante Lopez (+34) 91-8131-429 spice@sciops.esa.int or NAIF at JPL: Marc Costa Sitja (818) 354-4852 Marc.Costa.Sitja@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 = ( @2016-03-26 ) SCLK_DATA_TYPE_28 = ( 1 ) SCLK01_TIME_SYSTEM_28 = ( 1 ) SCLK01_N_FIELDS_28 = ( 2 ) SCLK01_MODULI_28 = ( 4294967296 65536 ) SCLK01_OFFSETS_28 = ( 0 0 ) SCLK01_OUTPUT_DELIM_28 = ( 1 ) SCLK_PARTITION_START_28 = ( 0 ) SCLK_PARTITION_END_28 = ( 2.81474976710656E14 ) SCLK01_COEFFICIENTS_28 = ( 0.0000000000000E+00 @2022-MAY-31-23:59:59.999 1 ) \begintext End of SCLK file.