KPL/SCLK JUNO SCLK File, for ``Standard'' and ``High Precision'' SCLK Formats =========================================================================== This SCLK kernel contains correlation data for the JUNO on-board clock tags presented either in ``standard'' or ``high precision'' format. ``Standard'' JUNO on-board clock tags are derived from 5-byte tags present in majority of the spacecraft and instrument telemetry and utilizing only the last of the five bytes for fractional seconds. This results in one SCLK tick being equal to 1/256 of a second. The ID of this clock is -61, the same as of the JUNO spacecraft. ``High precision'' JUNO on-board clock tags are derived from 6-byte tags present in some of the spacecraft and instrument telemetry and utilizing the last two of the six bytes for fractional seconds. This results in one SCLK tick being equal to 1/65536 of a seconds. The ID of this clock is -61999. Although SCLK parameters for these two correlations are different, having them in the same file and loading them at the same time does not cause any conflicts in JUNO SPICE implementation. This is because: 1) different IDs are used in the names of the keywords used to store these parameters in this file, 2) different IDs must be provided to get access to either of the two correlations, and 3) a specific ID -- normally ID of the ``standard'' clock -- is associated with each of the JUNO CK-based frames via definitions in the JUNO Frames Kernel. Production/History of This SCLK File -------------------------------------------------------- The data in this file was generated by the NAIF utility program MAKCLK, version 4.0.0, from the most recent JUNO spacecraft SCLKvSCET file (see corresponding section of the description for the SCLKvSCET contents and MAKCLK setup files). Usage -------------------------------------------------------- This file must be loaded into the user's program by a call to the FURNSH subroutine CALL FURNSH( 'this_file_name' ) in order to use the SPICELIB SCLK family of subroutines to convert either ``standard'' or ``high precision'' JUNO spacecraft on-board clock to ET and vice versa. SCLK Format -------------------------------------------------------- As mentioned above this SCLK kernel supports conversion of the JUNO on-board clock either in ``standard'' or ``high precision'' format. The JUNO on-board clock tags in ``standard'' format, to be converted using ID -61, have the following form: P/SSSSSSSSSS:FFF where: P/ -- optional partition identifier SSSSSSSSSS -- count of on-board seconds FFF -- count of fractions of a second with one fraction being 1/256 of a second; normally this field value is within 0..255 range. The JUNO on-board clock tags in ``high precision'' format, to be converted using ID -61999, have the following form: P/SSSSSSSSSS:FFFFF where: P/ -- optional partition identifier 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. MAKCLK User's Guide Document 3. SFOC SCLKvSCET SIS Document 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 SCLKvSCET File Contents -------------------------------------------------------- CCSD3ZS00001$$sclk$$NJPL3KS0L015$$scet$$ MISSION-NAME=JUNO; SPACECRAFT-NAME=JUNO; DATA-SET-ID=SCLK-SCET; FILE-NAME=JNO-SCLKSCET.00007; PRODUCT-CREATION-TIME=2012-03-08T18:00:00; PRODUCT-VERSION-ID=07; PRODUCER-ID=SCT; APPLICABLE-START-TIME=2000-001T00:00:00; APPLICABLE-STOP-TIME=2020-001T00:00:00; MISSION-ID=34; SPACECRAFT-ID=61; CCSD3RE00000$$scet$$NJPL3IS00613$$data$$ MAKCLK Setup Files -------------------------------------------------------- MAKCLK Setup for ``Standard'' Format Clock SCLKSCET_FILE = JNO_SCLKSCET.00007 OLD_SCLK_KERNEL = /sdma/naif/ops/projects/JUNO/scet/bin/juno_template.tsc FILE_NAME = JNO_SCLKSCET.00007.tsc NAIF_SPACECRAFT_ID = -61 LEAPSECONDS_FILE = /sdma/naif/ops/projects/JUNO/lsk/juno.tls PARTITION_TOLERANCE = 14 LOG_FILE = JNO_SCLKSCET.00007.log MAKCLK Setup for ``High Precision'' Format Clock SCLKSCET_FILE = JNO_SCLKSCET.00007 OLD_SCLK_KERNEL = /sdma/naif/ops/projects/JUNO/scet/bin/juno_template_65536.tsc FILE_NAME = JNO_SCLKSCET.00007.tsc NAIF_SPACECRAFT_ID = -61999 LEAPSECONDS_FILE = /sdma/naif/ops/projects/JUNO/lsk/juno.tls PARTITION_TOLERANCE = 3584 LOG_FILE = JNO_SCLKSCET.00007.log Kernel DATA for ``Standard'' Format Clock -------------------------------------------------------- \begindata SCLK_KERNEL_ID = ( @2012-03-08/18:37:03.00 ) SCLK_DATA_TYPE_61 = ( 1 ) SCLK01_TIME_SYSTEM_61 = ( 2 ) SCLK01_N_FIELDS_61 = ( 2 ) SCLK01_MODULI_61 = ( 4294967296 256 ) SCLK01_OFFSETS_61 = ( 0 0 ) SCLK01_OUTPUT_DELIM_61 = ( 1 ) SCLK_PARTITION_START_61 = ( 0.0000000000000E+00 9.3793618176000E+10 ) SCLK_PARTITION_END_61 = ( 9.3793616905000E+10 1.0995116277750E+12 ) SCLK01_COEFFICIENTS_61 = ( 0.0000000000000E+00 6.4184000000000E+01 1.0000000000000E+00 4.8472473856000E+10 1.8934566518400E+08 1.0000000000106E+00 7.2714240512000E+10 2.8404006618500E+08 9.9999999998596E-01 9.3793616905000E+10 3.6638138021900E+08 9.9999830502084E-01 9.5755854601000E+10 3.7404635822700E+08 1.0009769999981E+00 9.5756110601000E+10 3.7404735920400E+08 9.9999861571600E-01 9.6339759625000E+10 3.7632723504800E+08 9.9999860983214E-01 9.6715058185000E+10 3.7779324301000E+08 9.9999867672148E-01 9.6891686153000E+10 3.7848319509700E+08 9.9999866448606E-01 9.7557413385000E+10 3.8108368862400E+08 9.9999871140751E-01 9.8076925961000E+10 3.8311303200900E+08 9.9999874700000E-01 ) \begintext Kernel DATA for ``High Precision'' Format Clock -------------------------------------------------------- \begindata SCLK_KERNEL_ID = ( @2012-03-08/18:37:03.00 ) SCLK_DATA_TYPE_61999 = ( 1 ) SCLK01_TIME_SYSTEM_61999 = ( 2 ) SCLK01_N_FIELDS_61999 = ( 2 ) SCLK01_MODULI_61999 = ( 4294967296 65536 ) SCLK01_OFFSETS_61999 = ( 0 0 ) SCLK01_OUTPUT_DELIM_61999 = ( 1 ) SCLK_PARTITION_START_61999 = ( 0.0000000000000E+00 2.4011166253056E+13 ) SCLK_PARTITION_END_61999 = ( 2.4011165927604E+13 2.8147497671065E+14 ) SCLK01_COEFFICIENTS_61999 = ( 0.0000000000000E+00 6.4184000000000E+01 1.0000000000000E+00 1.2408953307136E+13 1.8934566518400E+08 1.0000000000106E+00 1.8614845571072E+13 2.8404006618500E+08 1.0000000000000E+00 2.4011165927604E+13 3.6638138021900E+08 9.9999830502084E-01 2.4513498777780E+13 3.7404635822700E+08 1.0009769999981E+00 2.4513564313780E+13 3.7404735920400E+08 9.9999861571600E-01 2.4662978463924E+13 3.7632723504800E+08 9.9999860983214E-01 2.4759054895284E+13 3.7779324301000E+08 9.9999867672148E-01 2.4804271655092E+13 3.7848319509700E+08 9.9999866448606E-01 2.4974697826484E+13 3.8108368862400E+08 9.9999871140751E-01 2.5107693045940E+13 3.8311303200900E+08 9.9999874700000E-01 ) \begintext End of SCLK file.