PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = " 2014-08-26 SwRI:BTCarcich updated comments, MET UNIT, MET DESCRIPTION 2019-04-01 SwRI:BLEnke extended date range to 2020 " RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 40 FILE_RECORDS = 945 ^TABLE = ("NH_MET2UTC.TAB", 1) MISSION_NAME = "NEW HORIZONS KUIPER BELT EXTENDED MISSION" INSTRUMENT_HOST_NAME = "NEW HORIZONS" DATA_SET_ID = "NH-A-REX-3-KEM1-V3.0" PRODUCER_INSTITUTION_NAME = "SOUTHWEST RESEARCH INSTITUTE" PRODUCT_CREATION_TIME = 2020-08-28 OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 945 COLUMNS = 2 ROW_BYTES = 40 NAME = "MET_CONVERSION_TABLE" DESCRIPTION = "This table contains information for converting between Mission Elapsed Time (MET) and Universal Coordinated Time (UTC). It is only an approximation; see caveats that follow. N.B. This series of caveats is a necessary result of the fact that this TABLE and this PDS label undergo continuing reviews by PDS peer reviewers and are assessed liens from time to time. N.B. This table is neither required nor recommended for use in working with New Horizon data by the New Horizons project, but was only provided as required by a lien levied during a PDS peer review. Simple linear interpolation is the only practical method to convert times not at the endpoints of the piecewise continuous function this TABLE presents, although so doing will not account for discontinuities in UTC (leap seconds) or in MET (spacecraft clock partition boundaries). To deal with such discontinuities, the user must follow the proper procedure as directed below; this TABLE is only provided as an approximation tool; as such this TABLE contains provision for neither identifying nor handling UTC or MET discontinuities. N.B. The proper procedure for converting between MET and UTC is to use the SPICE toolkit (http://naif.jpl.nasa.gov) and the SCLK correlation provided with the New Horizons SPICE data set, NH-J/P/SS-SPICE-6-V1.0. This file has only been provided as a convenience when the highest level of precision is not necessary (e.g. see next N.B.). N.B. The correlation in this file is extrapolated into the future, relative to the PRODUCT_CREATION_TIME, and for those times does not account for future events such as changes in the spacecraft clock rate, leap seconds, etc. The intent is to provide updated versions of this file throughout the project, so users of this file should use the SPICE toolkit when interpreting data with an observation date beyond the PRODUCT_CREATION_TIME of this file. " OBJECT = COLUMN NAME = "MET" START_BYTE = 1 BYTES = 10 COLUMN_NUMBER = 1 DATA_TYPE = ASCII_INTEGER FORMAT = "I10" DESCRIPTION = "This column is the MET of the spacecraft clock; as such, the UNIT of SECOND implies second as measured by the on-board spacecraft clock and not the International System of Units (SI) unit of second" UNIT = "SECOND" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UTC" START_BYTE = 16 BYTES = 23 FORMAT = "A23" COLUMN_NUMBER = 2 DATA_TYPE = TIME END_OBJECT = COLUMN END_OBJECT = TABLE END