PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 262 FILE_RECORDS = 13114 ^TABLE = "AP00029K.TAB" INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR" TARGET_NAME = "MARS" INSTRUMENT_NAME = "MARS ORBITER LASER ALTIMETER" DATA_SET_ID = "MGS-M-MOLA-3-PEDR-ASCII-V1.0" PRODUCT_ID = "AP00029K.TAB" MISSION_PHASE_NAME = "ORBIT INSERTION" ORBIT_NUMBER = 29 START_TIME = 1997-300T19:20:00.000 STOP_TIME = 1997-300T20:26:00.000 PRODUCT_RELEASE_DATE = 1999-03-01 DESCRIPTION = "This file contains an ASCII table that is virtually equivalent to the binary PEDR for the same orbit. The only difference is that the binary PEDR contains some additional engineering data. This file includes radius, topography, areoid heights, spacecraft location, and instrument data. The products are generated at the Geophysics Subnode of the Planetary Data System Geosciences Node, Washington University, by Jim Alexopoulos under the direction of Roger J. Phillips." PRODUCER_FULL_NAME = "ROGER J. PHILLIPS" PRODUCER_INSTITUTION_NAME = "WASHINGTON UNIVERSITY" PRODUCT_VERSION_TYPE = "FINAL" PRODUCER_ID = "PDS_GEOPHYSICS" SOFTWARE_NAME = "PEDR2TAB" OBJECT = TABLE ROWS = 13114 COLUMNS = 34 ROW_BYTES = 259 ROW_SUFFIX_BYTES = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The table includes descriptive information about the PEDR. The (space delimited) data require 259 ASCII characters; these are followed by a pad of 1 unspecified ASCII character, an ASCII carriage-return, and an ASCII line-feed." OBJECT = COLUMN NAME = "EAST_LONGITUDE" DATA_TYPE = ASCII_REAL POSITIVE_LONGITUDE_DIRECTION = "EAST" START_BYTE = 1 BYTES = 9 FORMAT = "F9.5" UNIT = "DEGREE" DESCRIPTION = "The areocentric East longitude, IAU1991, of the intersection point between the MOLA shot and the Mars surface." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LATITUDE" DATA_TYPE = ASCII_REAL START_BYTE = 10 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "The areocentric latitude, IAU1991, of the intersection point between the MOLA shot and the Mars surface." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TOPOGRAPHY" DATA_TYPE = ASCII_REAL START_BYTE = 20 BYTES = 11 FORMAT = "F11.2" UNIT = "METER" DESCRIPTION = "The planetary radius (SHOT_PLANETARY_RADIUS) minus the areoid radius (AREOID_RADIUS). The equipotential topography at the shot location." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "MOLA_RANGE" DATA_TYPE = ASCII_REAL START_BYTE = 31 BYTES = 10 FORMAT = "F10.2" UNIT = "METER" DESCRIPTION = "MOLA one-way shot range; the calibrated laser shot time-of-flight times the speed of light, divided by two, plus a range walk correction from the receiver model (RANGE_CORRECTION)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SHOT_PLANETARY_RADIUS (PLANET_RAD)" DATA_TYPE = ASCII_REAL START_BYTE = 41 BYTES = 12 FORMAT = "F12.2" UNIT = "METER" DESCRIPTION = "The distance from the center of Mars to the point on the surface of Mars described by the MOLA range." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TRIGGER_CHANNEL_NUMBER (C)" DATA_TYPE = ASCII_INTEGER START_BYTE = 53 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "Channel number of first MOLA channel to trigger." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ATTITUDE_FLAG (A)" DATA_TYPE = ASCII_INTEGER START_BYTE = 55 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "Flag (normally 0) indicating spacecraft attitude data was not available for all (3) or part (2) of a MOLA frame, in which case shot parameters are calculated assuming nadir-pointing geometry." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SC_LON" DATA_TYPE = ASCII_REAL START_BYTE = 57 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "The East longitude, IAU1991, of the Mars Global Surveyor spacecraft at MOLA transmit time." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SC_LAT" DATA_TYPE = ASCII_REAL START_BYTE = 67 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "The areocentric latitude, IAU1991, of the Mars Global Surveyor spacecraft at MOLA transmit time." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RADIAL_DISTANCE (SC_RADIUS)" DATA_TYPE = ASCII_REAL START_BYTE = 77 BYTES = 12 FORMAT = "F12.2" UNIT = "METER" DESCRIPTION = "The distance from center of mass of Mars to the Mars Global Surveyor spacecraft center of mass at laser fire time. Obtained from the MOLA Science Investigation Team precision orbit data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "OFF_NADIR_ANGLE (OFFNDR)" DATA_TYPE = ASCII_REAL START_BYTE = 89 BYTES = 7 FORMAT = "F7.3" UNIT = "DEGREE" DESCRIPTION = "Angle at the spacecraft between the transmitted laser shot direction and areocentric direction, at the frame mid-point." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SHOT_TIME (EPHEMERIS TIME)" DATA_TYPE = ASCII_REAL START_BYTE = 96 BYTES = 16 FORMAT = "F16.5" UNIT = "SECOND" DESCRIPTION = "The MOLA shot transmit time referenced to J2000 in seconds -- may be a negative number. The time is obtained from the Payload Data System broadcast time and the MOLA fine time counter via interpolation, using project-supplied clock conversions." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "AREODETIC_LATITUDE (AREOD_LAT)" DATA_TYPE = ASCII_REAL START_BYTE = 112 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "The areodetic latitude of the ground point with respect to an ellipsoid used in the archived PDS Viking Orbiter Mosaiced Digital Image Map (MDIM), whose flattening is approximately 1/192. The MDIMs were not as well controlled as the MOLA coordinates herein. This value is for comparison only. The MDIMS use longitudes that are positive West, with a different reference system. MOLA uses an areocentric coordinate system, for which latitude is unrelated to flattening, and longitude is positive East." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "AREOID_RADIUS (AREOID_RAD)" DATA_TYPE = ASCII_REAL START_BYTE = 122 BYTES = 11 FORMAT = "F11.2" UNIT = "METER" DESCRIPTION = "The radius of the reference areoid with a 3396 km mean equatorial radius." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SHOT" DATA_TYPE = ASCII_INTEGER START_BYTE = 133 BYTES = 4 FORMAT = "I4" UNIT = "N/A" DESCRIPTION = "Shot number (1-140) within a 14-second data packet. It is defined by 20 * (FRAME_INDEX - 1) + shot number (1-20)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PKT" DATA_TYPE = ASCII_INTEGER START_BYTE = 137 BYTES = 6 FORMAT = "I6" UNIT = "N/A" DESCRIPTION = "The packet sequence number generated by MOLA, incremented sequentially from 0 after an instrument restart. It is a 14-bit serial counter reset to zero every time MOLA is turned on or hot-started, incremented once per MOLA packet, or every 7 MOLA frames." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ORBIT_NUMBER" DATA_TYPE = ASCII_INTEGER START_BYTE = 143 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "Mission orbit number, determined by Mars Global Surveyor flight operations system." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ORBIT_QUALITY_FLAG (GMM)" DATA_TYPE = ASCII_INTEGER START_BYTE = 148 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "Mars gravity model number used for precision orbit determination and areoid reference, where GMM1 is 0, GMM1.2 is 2, GMM1.3 is 3, etc." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "FRAME_LOCAL_TIME (HRLCL)" DATA_TYPE = ASCII_REAL START_BYTE = 151 BYTES = 7 FORMAT = "F7.3" UNIT = "HOUR" DESCRIPTION = "The local solar time on Mars at the frame mid-point ground location, in hours from 0 to 24." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SOLAR_PHASE_ANGLE (S_PHAS)" DATA_TYPE = ASCII_REAL START_BYTE = 158 BYTES = 7 FORMAT = "F7.2" UNIT = "DEGREE" DESCRIPTION = "The angle between the vectors from Mars to Mars Global Surveyor and from Mars to the Sun at the frame mid-point location." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SOLAR_INCIDENCE_ANGLE (S_INC)" DATA_TYPE = ASCII_REAL START_BYTE = 165 BYTES = 7 FORMAT = "F7.2" UNIT = "DEGREE" DESCRIPTION = "The angle between the Mars surface normal vector and the Sun vector at the frame mid-point location." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "EMISSION_ANGLE (EMISSN)" DATA_TYPE = ASCII_REAL START_BYTE = 172 BYTES = 7 FORMAT = "F7.2" UNIT = "DEGREE" DESCRIPTION = "The angle between the Mars surface normal vector and a vector to Mars Global Surveyor at the frame mid-point ground location." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RANGE_CORRECTION (RCORR)" DATA_TYPE = ASCII_REAL START_BYTE = 179 BYTES = 7 FORMAT = "F7.2" UNIT = "METER" DESCRIPTION = "Correction to the shot range due to the detector response and range walk, from the receiver model. For comparison, the uncorrected topography equals TOPOGRAPHY + RANGE_CORRECTION * COS(EMISSION_ANGLE)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PULSE_WIDTH (PWT)" DATA_TYPE = ASCII_REAL START_BYTE = 186 BYTES = 8 FORMAT = "F8.1" UNIT = "NANOSECOND" DESCRIPTION = "The time between threshold crossings of the detected pulse. Saturation of energy detector may result in invalid data (see RECV_PULSE_ENERGY_COUNTS)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RECV_OPTICAL_PULSE_WIDTH (SIGOPT)" DATA_TYPE = ASCII_REAL START_BYTE = 194 BYTES = 8 FORMAT = "F8.1" UNIT = "NANOSECOND" DESCRIPTION = "Received optical pulse width, one sigma, corrected for filter characteristics and threshold settings, as determined by the receiver model. The pulse width provides an estimate of target slope and/or roughness, assuming linear detector response and nadir-looking geometry." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LASER_TRANSMIT_POWER (E_LASER)" DATA_TYPE = ASCII_REAL START_BYTE = 202 BYTES = 8 FORMAT = "F8.2" UNIT = "MILLIJOULE" DESCRIPTION = "MOLA laser transmitted pulse energy." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CORR_RECV_PULSE_ENRGY (PULSE_E)" DATA_TYPE = ASCII_REAL START_BYTE = 210 BYTES = 7 FORMAT = "F7.0" UNIT = "ATTOJOULE" DESCRIPTION = "Corrected surface-scattered return energy measured by first MOLA channel to trigger. Saturation of energy detector may result in invalid data (see RECV_PULSE_ENERGY_COUNTS)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SURF_REFLECTIVITY (REF*T%)" DATA_TYPE = ASCII_REAL START_BYTE = 217 BYTES = 7 FORMAT = "F7.3" UNIT = "PERCENT" DESCRIPTION = "Martian surface reflectivity times two-way atmospheric transmittance at 1064 nm wavelength from the link equation, in percent." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CHANNEL_BACKGROUND_NOISE_CTS (BKGRD)" DATA_TYPE = ASCII_INTEGER START_BYTE = 224 BYTES = 7 FORMAT = "I7" UNIT = "N/A" DESCRIPTION = "Background noise levels in the MOLA channels at half-frame rate for the trigger channel. A crude radiometer at 1064 nm." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CHANNEL_THRESHOLD_SETTINGS (TH_MV)" DATA_TYPE = ASCII_REAL START_BYTE = 231 BYTES = 7 FORMAT = "F7.1" UNIT = "MILLIVOLT" DESCRIPTION = "Threshold setting for the MOLA trigger channel at the threshold detector." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RECV_PULSE_WIDTH_COUNTS (WCT)" DATA_TYPE = ASCII_INTEGER START_BYTE = 238 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "The raw pulse width reading; in the range 0-63." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RECV_PULSE_ENERGY_COUNTS (ECT)" DATA_TYPE = ASCII_INTEGER START_BYTE = 241 BYTES = 4 FORMAT = "I4" UNIT = "N/A" DESCRIPTION = "The raw pulse energy reading; in the range 0-255." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RANGE_WIDTH (R_WND)" DATA_TYPE = ASCII_REAL START_BYTE = 245 BYTES = 7 FORMAT = "F7.0" UNIT = "METER" DESCRIPTION = "Frame value of range gate width (trigger window)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RANGE_DELAY (R_DLY)" DATA_TYPE = ASCII_REAL START_BYTE = 252 BYTES = 8 FORMAT = "F8.0" UNIT = "METER" DESCRIPTION = "Frame value of range gate delay to beginning of range trigger window." END_OBJECT = COLUMN END_OBJECT = TABLE END