urn:nasa:pds:magellan_arcdr:miscellaneous:arcdr_orbit_parameters 1.0 1.20.0.0 Product_Ancillary 2024-02-01 1.0 Inital Version 1990-09-15Z 1992-09-14Z Magellan Mission urn:nasa:pds:context:investigation:mission.magellan ancillary_to_investigation Magellan Host urn:nasa:pds:context:instrument_host:spacecraft.mgn is_instrument_host Radar System for Magellan Instrument urn:nasa:pds:context:instrument:mgn.rdrs is_instrument Venus Planet urn:nasa:pds:context:target:planet.venus ancillary_to_target arcdr_orbit_parameters.csv

0 313 7-Bit ASCII Text

ARCDR Orbit Parameters 313 PDS DSV 1 The Magellan ARCDR Orbit Parameters file is a CSV-format text file that contains information about Magellan orbits when altimetry and radiometry data were being collected. These orbit parameters are based on the elements used to generate the uplink commands for each mapping pass. They represents an average over the entire orbit, and are 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 files of the ARCDR dataset. 4611 Carriage-Return Line-Feed Comma 16 0 Orbit_File_Name 1 ASCII_String The name of the PDS4 orbit header file that the values were derived from. Version 2 ASCII_Integer Version is the version number of the orbit header file for this orbit. It is possible that there are multiple versions for a given orbit. Orbit_Number 3 ASCII_Integer The orbit number associated with the parameters in this record. Mapping_Cycle 4 ASCII_Integer The mapping cycle that this orbit occurred in. Altimetry_Points 5 ASCII_Integer The altimetry_points is the number of footprints in a specific orbit's altimetry data file. A value of zero may indicate that no altimetry data exists for this orbit. Radiometry_Points 6 ASCII_Integer The radiometry_points is the number of footprints in a specific orbit's radiometry data file. A value of zero may indicate that no altimetry data exists for this orbit. First_Altimetry_Time 7 ASCII_Date_Time_YMD_UTC The first_altimetry_time is the UTC time for the first altimetry footprint of an orbit. It equals the value in the first record of the orbit's altimetry data file. If there was no altimetry file for that orbit, the value is set to the missing value. 9009-09-09T09:09:09Z Last_Altimetry_Time 8 ASCII_Date_Time_YMD_UTC The last_altimetry_time is the UTC time for the last altimetry footprint of an orbit. It equals the value in the last record of the orbit's altimetry data file. If there was no altimetry file for that orbit, the value is set to the missing value. 9009-09-09T09:09:09Z First_Radiometry_Time 9 ASCII_Date_Time_YMD_UTC The first_radiometry_time is the UTC time for the first radiometry footprint of an orbit. It equals the value in the first record of the orbit's radiometry data file. If there was no radiometry file for that orbit, the value is set to the missing value. 9009-09-09T09:09:09Z Last_Radiometry_Time 10 ASCII_Date_Time_YMD_UTC The last_radiometry_time is the UTC time for the last radiometry footprint of an orbit. It equals the value in the last record of the orbit's radiometry data file. If there was no radiometry file for that orbit, the value is set to the missing value. 9009-09-09T09:09:09Z Orbit_Periapsis_Time 11 ASCII_Date_Time_YMD_UTC The orbit_periapsis_time is the predicted periapsis time of the orbit. Orbit_Semimajor_Axis 12 ASCII_Real km The orbit_semimajor_axis is the semi-major axis of the predicted orbit. Orbit_Eccentricity 13 ASCII_Real The orbit_eccentricity is the eccentricity of the predicted orbit. Orbit_Inclination 14 ASCII_Real degree The orbit_inclination is the angle of inclination of the predicted orbit with respect to the xy-plane of the J2000 coordinate system. Average_Longitude_Ascending_Node 15 ASCII_Real degree The average_longitude_ascending_node is the angle in the xy-plane of the J2000 coordinate system to the ascending node of the predicted orbit. Average_Periapsis_Argument 16 ASCII_Real degree The average_periapsis_argument is 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.