OBJECT = COLUMN NAME = SFDU_LABEL_AND_LENGTH START_BYTE = 1 DATA_TYPE = CHARACTER BYTES = 20 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_SFDU USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The SFDU_label_and_length element identifies the label and length of the Standard Format Data Unit (SFDU)." END_OBJECT OBJECT = COLUMN NAME = ORBIT_NUMBER START_BYTE = 21 DATA_TYPE = LSB_UNSIGNED_INTEGER BYTES = 4 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_NORBIT USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The orbit_number element provides the Magellan orbit number corresponding to the following three files (ephemeris, altimetry, and radiometry)." END_OBJECT OBJECT = COLUMN NAME = ALT_FOOTPRINTS START_BYTE = 25 DATA_TYPE = LSB_UNSIGNED_INTEGER BYTES = 4 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_NALT USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The alt_footprints element provides the value of the number of Standard Format Data Units in a specific orbit's altimetry data file." END_OBJECT OBJECT = COLUMN NAME = RAD_FOOTPRINTS START_BYTE = 29 DATA_TYPE = LSB_UNSIGNED_INTEGER BYTES = 4 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_NRAD USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The rad_footprints element provides the value of the number of Standard Format Data Units in a specific orbit's radiometry data file." END_OBJECT OBJECT = COLUMN NAME = FIRST_ALT_FOOTPRINT_TDB_TIME START_BYTE = 33 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_ALT_START USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The first_alt_footprint_tdb_time element provides the value of the spacecraft ephemeris time that represents the first altimeter footprint of this orbit. It is equal to the altimetry_footprint_tdb_time value in the first record of this orbit's altimetry data file." END_OBJECT OBJECT = COLUMN NAME = LAST_ALT_FOOTPRINT_TDB_TIME START_BYTE = 41 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_ALT_END USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The last_alt_footprint_tdb_time element provides the value of the spacecraft ephemeris time that represents the last altimeter footprint of this orbit. It is equal to the altimetry_footprint_tdb_time value in the last record of this orbit's altimetry data file." END_OBJECT OBJECT = COLUMN NAME = FIRST_RAD_FOOTPRINT_TDB_TIME START_BYTE = 49 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_RAD_START USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The first_rad_footprint_tdb_time element provides the value of the spacecraft ephemeris time of the first radiometer measurement of this orbit. It is equal to the rad_spacecraft_epoch_tdb_time value in the first record of this orbit's radiometry data file." END_OBJECT OBJECT = COLUMN NAME = LAST_RAD_FOOTPRINT_TDB_TIME START_BYTE = 57 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = OH_RAD_END USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The last_rad_footprint_tdb_time element provides the value of the spacecraft ephemeris time of the last radiometer measurement of this orbit. It is equal to the rad_spacecraft_epoch_tdb_time value in the last record of this orbit's radiometry data file." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_ORBIT_PERI_TDB_TIME START_BYTE = 65 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = 'OH_AVG.SCET' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_orbit_peri_tdb_time element provides the value of the periapsis time of the predicted orbit. This orbit is based on the elements used to generate the uplink commands for the current mapping pass. It represents an average over the entire orbit, and is not the result of post-orbit navigation solutions. The elements should be used for comparison purposes only, since they may involve large errors. The predicted orbit elements are copied from the orbit header file of the ALT-EDR tape." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_SEMIMAJOR_AXIS START_BYTE = 73 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = km OBJECT = ALIAS NAME = 'OH_AVG.SMA' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_semimajor_axis element provides the value of the semi-major axis of the predicted orbit." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_ECCENTRICITY START_BYTE = 81 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = 'N/A' OBJECT = ALIAS NAME = 'OH_AVG.ECC' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_eccentricity element provides the value of the eccentricity of the predicted orbit." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_INCLINATION START_BYTE = 89 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = deg OBJECT = ALIAS NAME = 'OH_AVG.INCL' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_inclination element provides the value of the angle of inclination of the predicted orbit with respect to the xy-plane of the J2000 coordinate system." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_ASC_NODE_LONGITUDE START_BYTE = 97 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = deg OBJECT = ALIAS NAME = 'OH_AVG.LONG' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_asc_node_longitude element provides the value of the angle in the xy-plane of the J2000 coordinate system to the ascending node of the predicted orbit." END_OBJECT OBJECT = COLUMN NAME = AVERAGE_PERIAPSIS_ARGUMENT START_BYTE = 105 DATA_TYPE = VAX_REAL BYTES = 8 UNIT = deg OBJECT = ALIAS NAME = 'OH_AVG.ARG' USAGE_NOTE = "MAGELLAN MIT ARCDR SIS" END_OBJECT DESCRIPTION = " The average_periapsis_argument element provides the value of the angle in the plane of the predicted orbit from the ascending node in the xy-plane of the J2000 coordinate system to the periapsis." END_OBJECT