CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL /* Detached PDS label for Pioneer Venus LOS gravity pointer table */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 202 FILE_RECORDS = 351 ^TABLE = "PVEN001N.DAT" OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 351 COLUMNS = 17 /* Dataset descriptive parameters */ DATA_SET_ID = "P12-V-RSS-4-LOS-GRAVITY-V1.0" TARGET_NAME = VENUS SPACECRAFT_NAME = "PIONEER VENUS ORBITER" INSTRUMENT_NAME = "PIONEER VENUS RADIOSCIENCE SUBSYSTEM" PRODUCER_FULL_NAME = "BRUCE BILLS" NOTE = "This table contains ancillary data to supplement the Pioneer Venus LOS Gravity Data file. This table has one record for each orbit in which LOS gravity data were acquired. Each record contains the minimum and maximum latitudes, longitudes, and altitudes for the orbit, along with the sub-Earth point latitude and longitude and the spacecraft location and velocity in a Venus-centered coordinate system (described below). Each record also contains a pointer to the first record for that orbit in the gravity data file, and the total number of records for that orbit. For reference, see Sjogren, W. L., R. J. Phillips, P. W. Birkeland, and R. N. Wimberly, Gravity anomalies on Venus, J. Geophys. Res., 85, 8295-8302, 1980." /* Descriptions of each column in the file */ OBJECT = COLUMN NAME = ORBIT_NUMBER DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 3 FORMAT = 'I3' DESCRIPTION = "The orbit during which data were acquired." END_OBJECT = COLUMN OBJECT = COLUMN NAME = START_RECORD DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 7 FORMAT = 'I7' DESCRIPTION = "The record number in the LOS Gravity Data file that contains the first data point for the given orbit." END_OBJECT = COLUMN OBJECT = COLUMN NAME = RECORDS DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 4 FORMAT = 'I4' DESCRIPTION = "The total number of records in the LOS Gravity Data file that contain data for the given orbit." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SUB_EARTH_LATITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 18 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The latitude of the point on Venus closest to the Earth at one point in the orbit when the data were acquired." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SUB_EARTH_LONGITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 27 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The longitude of the point on Venus closest to the Earth at one point in the orbit when the data were acquired. Longitude values increase to the east and range from 0 to 360." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MINIMUM_LATITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 36 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The latitude of the last data point in a given orbit. For most orbits, it is the southernmost latitude." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MINIMUM_LONGITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 45 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The longitude of the last data point in a given orbit. For most orbits, it is the minimum or westernmost longitude. Longitude values increase to the east and range from 0 to 360." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MAXIMUM_LATITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 54 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The latitude of the first data point in a given orbit. For most orbits, it is the northernmost latitude." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MAXIMUM_LONGITUDE DATA_TYPE = REAL UNIT = DEGREES START_BYTE = 63 BYTES = 8 FORMAT = 'F8.3' DESCRIPTION = "The longitude of the first data point in a given orbit. For most orbits it is the maximum or easternmost longitude. Longitude values increase to the east and range from 0 to 360." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MINIMUM_ALTITUDE DATA_TYPE = REAL UNIT = KILOMETERS START_BYTE = 72 BYTES = 10 FORMAT = 'F10.4' DESCRIPTION = "The altitude of the last point in a given orbit. For most orbits, it is the minimum altitude." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MAXIMUM_ALTITUDE DATA_TYPE = REAL UNIT = KILOMETERS START_BYTE = 83 BYTES = 10 FORMAT = 'F10.4' DESCRIPTION = "The altitude of the first point in a given orbit. For most orbits, it is the maximum altitude." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_LOCATION_X_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS START_BYTE = 94 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "Spacecraft location is given in a Cartesian coordinate system with an origin that coincides with the center of mass of the planet. The x-axis is oriented parallel to the intersection of the equatorial plane and the orbital plane of the planet." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_LOCATION_Y_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS START_BYTE = 112 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "Spacecraft location is given in a Cartesian coordinate system with an origin that coincides with the center of mass of the planet. The y-axis is in the equatorial plane of the planet and perpendicular to the x-axis." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_LOCATION_Z_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS START_BYTE = 130 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "Spacecraft location is given in a Cartesian coordinate system with an origin that coincides with the center of mass of the planet. The z-axis is perpendicular to the x-y plane." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_VELOCITY_X_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS/SECOND START_BYTE = 148 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "The velocity of the spacecraft along the x-axis." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_VELOCITY_Y_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS/SECOND START_BYTE = 166 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "The velocity of the spacecraft along the y-axis." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_VELOCITY_Z_COMPONENT DATA_TYPE = REAL UNIT = KILOMETERS/SECOND START_BYTE = 184 BYTES = 17 FORMAT = 'F17.9' DESCRIPTION = "The velocity of the spacecraft along the z-axis." END_OBJECT = COLUMN END_OBJECT = TABLE END