PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 236 FILE_RECORDS = 12624 ^TABLE = "AP00003V.TAB" INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR" TARGET_NAME = "MARS" INSTRUMENT_NAME = "MARS ORBITER LASER ALTIMETER" DATA_SET_ID = "MGS-M-MOLA-5-PEDR-SAMPLER-V1.0" PRODUCT_ID = "AP00003V.TAB" MISSION_PHASE_NAME = "ORBIT INSERTION" ORBIT_NUMBER = 3 START_TIME = 1997-258T19:10:00.000 STOP_TIME = 1997-258T19:45:00.000 PRODUCT_RELEASE_DATE = 1998-03-01 DESCRIPTION = "This file contains the calibrated MOLA ranges, energies, and topography for 18 contingency passes, Fall 1997. The tables have 29 columns, delimited by spaces. The tables contain radii, topography, areoid heights, spacecraft location, and instrument data. The information in these files is virtually identical to the binary PEDR. The binary tables contain additional engineering data. The products are produced at the Goddard Space Flight Center under the direction of David E. Smith." PRODUCER_FULL_NAME = "DAVID E. SMITH" PRODUCER_INSTITUTION_NAME = "NASA/GODDARD SPACE FLIGHT CENTER" PRODUCT_VERSION_TYPE = "FINAL" PRODUCER_ID = "MGS MOLA TEAM" SOFTWARE_NAME = "PRECISION ORBIT PROFILE PROCESSOR" OBJECT = TABLE ROWS = 12624 COLUMNS = 29 ROW_BYTES = 233 ROW_SUFFIX_BYTES = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The table includes descriptive information about the PEDR. The (space delimited) data require 233 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 = "LONGITUDE" DATA_TYPE = ASCII_REAL POSITIVE_LONGITUDE_DIRECTION = "EAST" START_BYTE = 1 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "Areocentric longitude of the intersection of the laser shot and the Martian surface, from precision orbit data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LATITUDE" DATA_TYPE = ASCII_REAL START_BYTE = 11 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "Areocentric latitude of the intersection of the laser shot and the Martian surface, from precision orbit data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "AREOPOTENTIAL TOPOGRAPHY" DATA_TYPE = ASCII_REAL START_BYTE = 21 BYTES = 11 FORMAT = "F11.2" UNIT = "METER" DESCRIPTION = "The topography relative to a reference potential surface." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "MOLA RANGE" DATA_TYPE = ASCII_REAL START_BYTE = 32 BYTES = 10 FORMAT = "F10.2" UNIT = "METER" DESCRIPTION = "The corrected range from the MOLA instrument to the planet, as indicated by the time from the centroid of the laser pulse to the centroid of the received pulse, times the speed of light divided by 2. The raw range from the Timing Interval Unit is added to the range walk and instrument response corrections (range_correction) to produce the corrected range." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PLANETARY RADIUS" DATA_TYPE = ASCII_REAL START_BYTE = 42 BYTES = 12 FORMAT = "F12.2" UNIT = "METER" DESCRIPTION = "The planetary radius relative to the center-of-mass of Mars." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPACECRAFT RADIUS" DATA_TYPE = ASCII_REAL START_BYTE = 54 BYTES = 12 FORMAT = "F12.2" UNIT = "METER" DESCRIPTION = "The spacecraft radial distance relative to the center-of-mass of Mars." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "EMISSION ANGLE" DATA_TYPE = ASCII_REAL START_BYTE = 66 BYTES = 7 FORMAT = "F7.3" UNIT = "DEGREE" DESCRIPTION = "The angle between the actual shot direction and areocentric direction (i.e., emission angle)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "EPHEMERIS TIME" DATA_TYPE = ASCII_REAL START_BYTE = 73 BYTES = 16 FORMAT = "F16.5" UNIT = "SECOND" DESCRIPTION = "The ephemeris time from J2000 at pulse receipt time." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "AREOGRAPHIC LATITUDE" DATA_TYPE = ASCII_REAL START_BYTE = 89 BYTES = 10 FORMAT = "F10.5" UNIT = "DEGREE" DESCRIPTION = "The areographic latitude using a flattening of 1/192." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "AREOID RADIUS" DATA_TYPE = ASCII_REAL START_BYTE = 99 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 = "CHANNEL" DATA_TYPE = ASCII_INTEGER START_BYTE = 110 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "The MOLA laser trigger channel." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "R_CORR" DATA_TYPE = ASCII_REAL START_BYTE = 113 BYTES = 8 FORMAT = "F8.2" UNIT = "METER" DESCRIPTION = "The range walk and instrument correction. It is added to the raw range to produce the corrected range" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PULSE WIDTH (WY)" DATA_TYPE = ASCII_REAL START_BYTE = 121 BYTES = 8 FORMAT = "F8.2" UNIT = "NANOSECOND" DESCRIPTION = "The measured pulse width at the detector threshold setting." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LASER PULSE WIDTH" DATA_TYPE = ASCII_REAL START_BYTE = 129 BYTES = 8 FORMAT = "F8.2" UNIT = "NANOSECOND" DESCRIPTION = "Start detector leading edge timing bias, including start detector filter response and outgoing laser pulse width." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SIGR" DATA_TYPE = ASCII_REAL START_BYTE = 137 BYTES = 8 FORMAT = "F8.2" UNIT = "NANOSECOND" DESCRIPTION = "Received pulse width, one sigma, after matched channel filter, corrected for threshold settings as determined by the receiver model." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SIGOPT" DATA_TYPE = ASCII_REAL START_BYTE = 145 BYTES = 8 FORMAT = "F8.2" UNIT = "NANOSECOND" DESCRIPTION = "The received optical pulse width (one sigma), corrected for filter characteristics and threshold settings, as determined by the receiver model, with the minimum limited by the filter response." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LASER OUTPUT" DATA_TYPE = ASCII_REAL START_BYTE = 153 BYTES = 8 FORMAT = "F8.3" UNIT = "MILLIJOULE" DESCRIPTION = "The energy of the laser output, calibrated for temperatures of the start detector (SD), and diode array heat sink (AHST)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PULSE ENERGY" DATA_TYPE = ASCII_REAL START_BYTE = 161 BYTES = 9 FORMAT = "F9.3" UNIT = "ATTOJOULE" DESCRIPTION = "The received pulse energy scattered from the surface, as determined by the detector model." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "REF_TRAN" DATA_TYPE = ASCII_REAL START_BYTE = 170 BYTES = 8 FORMAT = "F8.6" UNIT = "N/A" DESCRIPTION = "The Reflectivity- Atmospheric Transmission product, inferred from link equation using columns 4 (corrected range), 17 (laser output), and 18 (received pulse energy). The true reflectivity is REF_TRAN * exp(-2*Tau), where Tau is the atmospheric opacity, nominally 0.5." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PKT" DATA_TYPE = ASCII_INTEGER START_BYTE = 178 BYTES = 6 FORMAT = "I6" UNIT = "N/A" DESCRIPTION = "The packet number from the Payload Data System." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "BACKGROUND COUNTS" DATA_TYPE = ASCII_INTEGER START_BYTE = 184 BYTES = 7 FORMAT = "I7" UNIT = "N/A" DESCRIPTION = "The background counts on the trigger channel. A measure of surface radiation intensity." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RECEIVER THRESHOLD" DATA_TYPE = ASCII_REAL START_BYTE = 191 BYTES = 7 FORMAT = "F7.1" UNIT = "MILLIVOLT" DESCRIPTION = "The receiver threshold setting." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PECT" DATA_TYPE = ASCII_INTEGER START_BYTE = 198 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "The pulse energy counts (0-255). A value of 255 is saturated." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PWCT" DATA_TYPE = ASCII_INTEGER START_BYTE = 203 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "The pulse width counts (0-63). A value of 63 is saturated. Note that the pulse width measurement is unreliable when PECT is saturated." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIU_CTS" DATA_TYPE = ASCII_INTEGER START_BYTE = 208 BYTES = 8 FORMAT = "I8" UNIT = "N/A" DESCRIPTION = "Timing interval unit counts (99,996,280 Hz is nominal)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "START ENCODER" DATA_TYPE = ASCII_INTEGER START_BYTE = 216 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The start encoder bits from variable delay lines. With these bits, the MOLA shot range is interpolated within each clock count." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "STOP ENCODER" DATA_TYPE = ASCII_INTEGER START_BYTE = 218 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The stop encoder bits from variable delay lines. With these bits, the MOLA shot range is interpolated within each clock count." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RANGE DELAY" DATA_TYPE = ASCII_INTEGER START_BYTE = 220 BYTES = 8 FORMAT = "I8" UNIT = "N/A" DESCRIPTION = "The range delay, in counts. The one-way range delay distance is this value * 1.499 m, approximately." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RANGE WINDOW" DATA_TYPE = ASCII_INTEGER START_BYTE = 228 BYTES = 6 FORMAT = "I6" UNIT = "N/A" DESCRIPTION = "The range window, in counts. The one-way range window width is this value * 1.499 m, approximately." END_OBJECT = COLUMN END_OBJECT = TABLE END