PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 179 FILE_RECORDS = 988 INSTRUMENT_HOST_NAME = "MARS EXPRESS" TARGET_NAME = "MARS" DATA_SET_ID = "MEX-M-MRS-1/2/3-EXT2-1522-V1.0" PRODUCT_ID = "OCCLOG05.TAB" PRODUCT_RELEASE_DATE = 2008-07-29 DESCRIPTION = "This file contains summary information for each Mars Express (MEX) experiment successfully conducted using the DSN Radio Science Receiver (RSR) or the Arecibo Observatory receivers (AOR) during the MEX Extended Mission phase. Some (but not all) unsuccessful operations are also included. Data are organized as a PDS TABLE object with 20 columns of fixed widths. Columns include start/stop times for data acquisition, antenna number, sample rate, bit resolution, record length, number of records, maximum signal-to-noise ratio, RSR or AOR file name, SOE file name, data quality indicator, orbit number, experiment type, and comments. Columnar data and delimiters require 177 bytes; these are followed by an ASCII carriage-return and line feed, making the total line length equal to 179 bytes. This file was produced by the Mars Express Radio Science Team (MaRS) Stanford University Element (SUE) under the direction of G. Leonard Tyler." START_TIME = 2005-12-02T02:10:00 STOP_TIME = 2009-03-24T18:18:00 START_ORBIT_NUMBER = 2423 STOP_ORBIT_NUMBER = 6707 PRODUCT_CREATION_TIME = 2011-07-21T17:21:20.000 PRODUCT_VERSION_TYPE = "PRELIMINARY" ^OCCLOG_TABLE = "OCCLOG05.TAB" OBJECT = OCCLOG_TABLE NAME = "OCCULTATION LOG ENT" ROWS = 988 COLUMNS = 20 ROW_BYTES = 179 ROW_SUFFIX_BYTES = 0 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The OCCLOG table contains a summary line from each MEX RSR operation. Each line contains 177 bytes of data followed by an ASCII carriage-return line-feed pair. Character strings are enclosed by double quotes, fields are delimited by commas; neither is counted in defining either START_BYTE or BYTES." OBJECT = COLUMN NAME = "START TIME" COLUMN_NUMBER = 1 DATA_TYPE = TIME START_BYTE = 1 BYTES = 19 DESCRIPTION = "The date and time of the first RSR sample in the data file. Format is YYYY-MM-DDThh:mm:ss where YYYY is the 4-digit year MM is the 2-digit month DD is the 2-digit day-of-month hh is the 2-digit hour mm is the 2-digit minute ss is the 2-digit second and time reference system is UTC. Time may be blank if no data were collected." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "STOP TIME" COLUMN_NUMBER = 2 DATA_TYPE = TIME START_BYTE = 21 BYTES = 19 DESCRIPTION = "The date and time of the last integer second time tag in the data file. Format is YYYY-MM-DDThh:mm:ss where YYYY is the 4-digit year MM is the 2-digit month DD is the 2-digit day-of-month hh is the 2-digit hour mm is the 2-digit minute ss is the 2-digit second and time reference system is UTC. May be blank or partly blank if no data were collected." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DSN TRACKING MODE" COLUMN_NUMBER = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 41 BYTES = 1 FORMAT = "I1" DESCRIPTION = "DSN tracking mode is 1 if the spacecraft is transmitting with no uplink frequency reference (1-way), 2 is there is an uplink reference from the receiving station (2-way), and 3 of there is an uplink reference from a different ground station (3-way)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UPLINK DSS" COLUMN_NUMBER = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 43 BYTES = 3 FORMAT = "I3" DESCRIPTION = "The number of the DSN antenna used to transmit the uplink frequency reference; or 0 if none, or 255 if not known. See ANTENNA NUMBER (below) for more information." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ANTENNA NUMBER" COLUMN_NUMBER = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 47 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The number of the DSN antenna used to collect the open-loop (RSR) data. 70-m antennas include DSS 14, 43, and 63; 34-m high-efficiency (HEF) antennas include DSS 15, 45, and 65. 34-m beam-waveguide (BWG) antennas include DSS 25, 34, and 54." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UPLINK-DOWNLINK PAIRING" COLUMN_NUMBER = 6 DATA_TYPE = CHARACTER START_BYTE = 51 BYTES = 4 FORMAT = "A4" DESCRIPTION = "The uplink frequency band (S, X, or '-' if none) and the downlink band (S or X) and polarization (R or L) for this RSR channel. The uplink and downlink components are separated by a forward slash '/'). For example, if there is no uplink and the data were collected using the X-RCP receiver, this column would read '-/XR'." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RSR ID" COLUMN_NUMBER = 7 DATA_TYPE = ASCII_INTEGER START_BYTE = 57 BYTES = 2 FORMAT = "I2" DESCRIPTION = "The identifier of the Radio Science Receiver (RSR) within the DSN complex. A number between 1 and 16." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RSR SUBCHANNEL ID" COLUMN_NUMBER = 8 DATA_TYPE = ASCII_INTEGER START_BYTE = 60 BYTES = 1 FORMAT = "I1" DESCRIPTION = "The identifier of the Radio Science Receiver subchannel. A number between 1 and 4." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SAMPLE RATE" COLUMN_NUMBER = 9 DATA_TYPE = ASCII_INTEGER START_BYTE = 62 BYTES = 5 FORMAT = "I5" UNIT = "KILOSAMPLE PAIRS PER SECOND" DESCRIPTION = "The sampling rate for the channel in the data file. Complex (I/Q) samples were taken; this is the rate of I/Q pairs. Nominal rate for MEX radio occultations was 2 ksps. Left blank or set to 0 if no data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "BIT RESOLUTION" COLUMN_NUMBER = 10 DATA_TYPE = ASCII_INTEGER START_BYTE = 68 BYTES = 2 FORMAT = "I2" UNIT = "BIT" DESCRIPTION = "The number of bits in each individual I and Q sample. Nominally 16 for the sampling rate of 2 ksps (32 bits for the I/Q pair). Left blank or set to 0 if no data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RECORD LENGTH" COLUMN_NUMBER = 11 DATA_TYPE = ASCII_INTEGER START_BYTE = 71 BYTES = 5 FORMAT = "I5" UNIT = "BYTE" DESCRIPTION = "The number of bytes in each logical record in the file. For nominal radio occultation operations this was usually 8260 bytes, of which 260 bytes were header and the remaining 8000 bytes contained 2000 16-bit I and 16-bit Q pairs. Left blank or set to 0 if no data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "NUMBER OF RECORDS" COLUMN_NUMBER = 12 DATA_TYPE = ASCII_INTEGER START_BYTE = 77 BYTES = 6 FORMAT = "I6" UNIT = "N/A" DESCRIPTION = "The number of records in the file. Number of records multiplied by the record length (Column 11) equals the file size in bytes. Left blank or set to 0 if no data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "MAXIMUM SIGNAL-TO-NOISE RATIO" COLUMN_NUMBER = 13 DATA_TYPE = ASCII_REAL START_BYTE = 84 BYTES = 5 FORMAT = "F5.1" UNIT = "DECIBEL PER HERTZ" DESCRIPTION = "The maximum carrier-to-noise level during times when the spacecraft signal could be detected. Often based on 60- second power spectra with 5 Hz resolution, calculated by program FNDLOOK. Left blank or set to 0 if no data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SYSTEM TEMPERATURE" COLUMN_NUMBER = 14 DATA_TYPE = ASCII_REAL START_BYTE = 90 BYTES = 6 FORMAT = "F6.2" UNIT = "KELVIN" DESCRIPTION = "The system temperature of the open-loop receiving system; source is TBD. Set to 0 or left blank if unknown." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RSR FILE NAME" COLUMN_NUMBER = 15 DATA_TYPE = CHARACTER START_BYTE = 98 BYTES = 12 FORMAT = "A12" UNIT = "N/A" DESCRIPTION = "The name of the file containing RSR records (headers plus data samples). Files have names of the form YDDDhhmC.RSR where Y is the 1-digit year of the first data sample DDD is the 3-digit day-of-year of the first data sample hh is the 2-digit hour of the first data sample m is the 1-digit tens minute of the first data sample C is a received signal band/polarization/sequence code C is assigned as follows: A X-RCP (first file or version at YDDDhhm) B S-RCP (first file or version at YDDDhhm) C X-LCP (first file or version at YDDDhhm) D S-LCP (first file or version at YDDDhhm) E X-RCP (second file or version at YDDDhhm) F S-RCP (second file or version at YDDDhhm) G X-LCP (second file or version at YDDDhhm) H S-LCP (second file or version at YDDDhhm) ... U X-RCP (sixth file or version at YDDDhhm) V S-RCP (sixth file or version at YDDDhhm) W X-LCP (sixth file or version at YDDDhhm) X S-LCP (sixth file or version at YDDDhhm) Left blank if data acquisition was unsuccessful." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SOE FILE NAME" COLUMN_NUMBER = 16 DATA_TYPE = CHARACTER START_BYTE = 113 BYTES = 12 FORMAT = "A12" UNIT = "N/A" DESCRIPTION = "The name of the controlling Sequence of Events file when the data were collected. File names have the form: ydddeeeC.SOE where y is the 1-digit year on which the file starts ddd is the 3-digit day-of-year on which the file starts eee is the 3-digit day-of-year on which the file ends C is a character denoting sequence or version of the file (first is 'A', second is 'B', ...) In cases where the SOE file is not available at the time the entry was made in this table, the file name may be wrong. Left blank if not known or if irrelevant (data collected did not involve an SOE)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "QUALITY" COLUMN_NUMBER = 17 DATA_TYPE = CHARACTER START_BYTE = 128 BYTES = 3 FORMAT = "A3" UNIT = "N/A" DESCRIPTION = "Data quality indicator. First character indicates expectation from observation: A Scheduled science observation; high-quality science expected B Lower quality data expected (e.g., spacecraft using LGA) C Non-science observation (e.g., USO test, DSN test) D Observation opportunity, but not scheduled Second character indicates results: 0 No data, or data irreparably corrupted 1 Data badly corrupted; no present plan to attempt recovery 2 Seriously degraded data, from causes beyond control (e.g., weather) 3 Seriously degraded data from causes associated with equipment 4 Minor degradations (SNR 6 dB low, frequency residuals, missing records, baseline unstable, uplink ramping) 5 No known problems Third character gives main cause for degradation (if any): a all OK b baseline unstable or too short d DSP or RSR failure e equipment failure (other than RSR or GDS) f frequency instabilities/residuals g data lost in ground data system (GDS) i interference l incorrect level setting (attenuation) m missing records n low carrier-to-noise, or unstable noise level o operations error p POCA q spacecraft quirk or anomaly r ripple (spectral or temporal) s sawtooth frequency residual t tuning or timing (orbit) problem u spurs w weather x not applicable y unknown z multiple problems" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ORBIT NUMBER" COLUMN_NUMBER = 18 DATA_TYPE = ASCII_INTEGER START_BYTE = 133 BYTES = 5 FORMAT = "I5" UNIT = "N/A" DESCRIPTION = "Orbit number from MEX provided list." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "EXPERIMENT TYPE" COLUMN_NUMBER = 19 DATA_TYPE = CHARACTER START_BYTE = 140 BYTES = 1 FORMAT = "A1" UNIT = "N/A" DESCRIPTION = "The investigation primarily supported by these data: b bistatic radar e occultation egress g gravity i occultation ingress o occultation(s) s solar conjunction " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "COMMENTS" COLUMN_NUMBER = 20 DATA_TYPE = CHARACTER START_BYTE = 144 BYTES = 33 FORMAT = "A33" UNIT = "N/A" DESCRIPTION = "Terse comments, usually expanding on the QUALITY assignment or the nature of anomalies." END_OBJECT = COLUMN END_OBJECT = OCCLOG_TABLE END