PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 256087 RECORD_BYTES = 152 ^TABLE = "EVENT_WIND_SUMMARY.TAB" DATA_SET_ID = "VL2-M-SEIS-5-RDR-V1.0" PRODUCT_ID = "EVENT_WIND_SUMMARY" PRODUCT_CREATION_TIME = 2016-12-12T00:00:00 SPACECRAFT_NAME = "VIKING LANDER 2" INSTRUMENT_NAME = "VIKING LANDER 2 SEISMOLOGY EXPERIMENT" TARGET_NAME = "MARS" START_TIME = 1976-09-04T00:53:01 STOP_TIME = 1978-03-17T06:52:23 SPACECRAFT_CLOCK_START_COUNT = "N/A" SPACECRAFT_CLOCK_STOP_COUNT = "N/A" OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 256087 ROW_BYTES = 152 COLUMNS = 24 DESCRIPTION = "This file is a summary of the Viking Seismometer Data Event mode records, intended as a high-level index to events of interest, and for large-scale correlation with meteorological data. In Event mode, raw readings were compressed in the instrument itself by recording the number of positive-going zero crossings in a 1.01s interval, and recording an envelope value generated by digital filtering. For details see VPDS_EVENT_WINDS_FORMAT.TXT in the DOCUMENT directory. Time is Local Lander Time." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = ARCHIVED_RECORD_NUMBER DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 6 DESCRIPTION = "An ordinal number indicating the record in the present file and in the corresponding archive files (VPDS_EVENT_XAMP.CSV etc.) Note that those files only carry the records with 51 readings, hence there are fewer records in the archive file than in the present summary." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = SEISMIC_TIME_SOLS DATA_TYPE = ASCII_REAL START_BYTE = 7 BYTES = 12 DESCRIPTION = "The mission time in decimal Sols (i.e. sol+(hr*3600.0+min*60.0+sec)/88775.0)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = ORIGINAL_FILE_NUMBER DATA_TYPE = ASCII_INTEGER START_BYTE = 19 BYTES = 6 DESCRIPTION = "The file number of the original data (i.e. file number 0101 corresponds to VUSA.0101)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = ORIGINAL_RECORD_NUMBER DATA_TYPE = ASCII_INTEGER START_BYTE = 25 BYTES = 7 DESCRIPTION = "The line number in the original VUSA file to which the present record corresponds." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = DATA_ACQUISITION_SOL DATA_TYPE = ASCII_INTEGER START_BYTE = 32 BYTES = 4 DESCRIPTION = "The sol number on which the data were acquired. Landing day is sol 0." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = DATA_ACQUISITION_HOUR DATA_TYPE = ASCII_INTEGER START_BYTE = 36 BYTES = 4 DESCRIPTION = "The hour of acquisition end." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = DATA_ACQUSITION_MINUTE DATA_TYPE = ASCII_INTEGER START_BYTE = 40 BYTES = 4 DESCRIPTION = "The minute of acquisition end." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = DATA_ACQUISITION_SECOND DATA_TYPE = ASCII_INTEGER START_BYTE = 44 BYTES = 4 DESCRIPTION = "The second of acquisition end. Note that the data in the VUSA file are reported at 1Hz, thus the end of acquisition is typically 51 seconds after this time." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = MEDIAN_X_AXIS DATA_TYPE = ASCII_INTEGER START_BYTE = 48 BYTES = 5 DESCRIPTION = "The median X-axis reading. 1 digital unit (DU) corresponds roughly to 2nm at 3Hz (see seismic_dataset.cat)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = FIRST_X_AXIS DATA_TYPE = ASCII_INTEGER START_BYTE = 53 BYTES = 5 DESCRIPTION = "The first X-axis reading in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = MAXIMUM_X_AXIS DATA_TYPE = ASCII_INTEGER START_BYTE = 58 BYTES = 5 DESCRIPTION = "The maximum X-axis reading in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = MINIMUM_X_AXIS DATA_TYPE = ASCII_INTEGER START_BYTE = 63 BYTES = 5 DESCRIPTION = "The minimum X-axis reading in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = RMS_X_AXIS_X100 DATA_TYPE = ASCII_INTEGER START_BYTE = 68 BYTES = 6 DESCRIPTION = "100 times the RMS X-axis reading." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = RMS_Y_AXIS_X100 DATA_TYPE = ASCII_INTEGER START_BYTE = 74 BYTES = 6 DESCRIPTION = "100 times the RMS Y-axis reading." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = RMS_Z_AXIS_X100 DATA_TYPE = ASCII_INTEGER START_BYTE = 80 BYTES = 6 DESCRIPTION = "100 times the RMS Z-axis reading." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = MEAN_X_AXIS_CROSSINGS DATA_TYPE = ASCII_INTEGER START_BYTE = 86 BYTES = 5 DESCRIPTION = "The mean number of X-axis zero-crossings in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = MEAN_Y_AXIS_CROSSINGS DATA_TYPE = ASCII_INTEGER START_BYTE = 91 BYTES = 5 DESCRIPTION = "The mean number of Y-axis zero-crossings in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = MEAN_Z_AXIS_CROSSINGS DATA_TYPE = ASCII_INTEGER START_BYTE = 96 BYTES = 5 DESCRIPTION = "The mean number of Z-axis zero-crossings in the record." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = METEO_TIME_SOLS DATA_TYPE = ASCII_REAL START_BYTE = 101 BYTES = 11 DESCRIPTION = "The mission time in decimal Sols (i.e. sol+(hr*3600.0+min*60.0+sec)/88775.24) of the meteorological data." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = WINDSPEED DATA_TYPE = ASCII_REAL START_BYTE = 112 BYTES = 7 UNIT = "m/s" DESCRIPTION = "nearest windspeed (m/s)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = PRESSURE DATA_TYPE = ASCII_REAL START_BYTE = 119 BYTES = 7 UNIT = "mbar" DESCRIPTION = "pressure (mbar)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = WIND_DIRECTION DATA_TYPE = ASCII_REAL START_BYTE = 126 BYTES = 8 UNIT = "deg" DESCRIPTION = "wind direction (degrees clockwise from North towards which the wind is blowing)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = AIR_TEMPERATURE DATA_TYPE = ASCII_REAL START_BYTE = 134 BYTES = 8 UNIT = "K" DESCRIPTION = "Measured air temperature (K). Note that this value has not been screened for possible lander thermal contamination (see Hess et al. 1977)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = WIND_SEISMIC_INTERVAL DATA_TYPE = ASCII_INTEGER START_BYTE = 142 BYTES = 9 UNIT = "second" DESCRIPTION = "Time in seconds between closest wind measurement and the end of the seismic record (for the first and last sol of the file, this value should be ignored). Positive means seismic data obtained after meteorology" END_OBJECT = COLUMN END_OBJECT = TABLE END