PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 74 FILE_RECORDS = 304 INSTRUMENT_HOST_NAME = "VIKING LANDER 1" TARGET_NAME = "MARS" INSTRUMENT_NAME = {"CAMERA 1","CAMERA 2"} DATA_SET_ID = "VL1/VL2-M-LCS-5-ROCKS-V1.0" PRODUCT_ID = "VL1AXRAT.TAB" PRODUCT_RELEASE_DATE = 1998-12-31 DESCRIPTION = "This file contains binned results from calculations based on dimensions of Mars rocks near the Viking Lander 1 site. Estimates of surface area and of three axial ratios were computed from data in file VL0ROCKS.TAB; results were binned according to the average diameter as follows: AREA = L*W*PI/4 binned according to DLW = SQRT(L*W) ARLW = MIN(L,W)/MAX(L,W) binned according to DLW = SQRT(L*W) ARWH = MIN(W,H)/MAX(W,H) binned according to DWH = SQRT(W*H) ARLH = MIN(L,H)/MAX(L,H) binned according to DLH = SQRT(L*H) where ARxy denotes axial ratio of dimensions x and y Dxy denotes average diameter using dimensions x and y L = estimated longest dimension of the rock W = estimated width of the rock (orthogonal to length) H = estimated vertical exposure of the rock and MIN(X,Y) is the smaller of X and Y MAX(X,Y) is the larger of X and Y Bin boundaries were set at 1/128th meter and at powers of SQRT(2) larger (0.008, 0.011, ... , 1.000, 1.414 m). The AREA covered by rocks in each bin was summed; the average and standard deviation of the axial ratios for rocks in each bin were calculated. The results are tabulated according to surface type (drift area, far field, near field, and excluded) and by burial state (perched, partially buried, buried, and unknown). The cumulative results for all bins are included for each surface type and burial state combination." PRODUCT_CREATION_TIME = 1998-05-08T18:00:00.000 PRODUCER_FULL_NAME = "RICHARD A. SIMPSON" PRODUCER_INSTITUTION_NAME = "STANFORD UNIVERSITY" PRODUCT_VERSION_TYPE = "PRELIMINARY" ^TABLE = "VL1AXRAT.TAB" OBJECT = TABLE NAME = "VL1 ROCK AXIAL RATIOS" ROWS = 304 COLUMNS = 16 ROW_BYTES = 74 ROW_SUFFIX_BYTES = 0 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The VL1AXRAT table contains areal coverage and axial ratio statistics for rocks measured near the VL1 landing site. Each line contains 72 bytes of data followed by an ASCII carriage-return line-feed pair. Fields are delimited by commas, which are not counted in defining either START_BYTE or BYTES." OBJECT = COLUMN NAME = "SURFACE TYPE" COLUMN_NUMBER = 1 DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 1 FORMAT = "I1" UNIT = "N/A" DESCRIPTION = "A numerical key denoting the type of surface within which the rock was found. Values include: 1 = Drift materials 2 = Far field (approximately 3-9 m from the spacecraft) 3 = Near field (less than about 3 meters from the spacecraft) 4 = Excluded (not included in the statistical calculations)" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "BURIAL STATE" COLUMN_NUMBER = 2 DATA_TYPE = ASCII_INTEGER START_BYTE = 3 BYTES = 1 FORMAT = "I1" UNIT = "N/A" DESCRIPTION = "A numerical key denoting the burial state of the rock. Values include: 1 = Perched (essentially not buried) 2 = Partially buried 3 = Buried 4 = Unknown" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "BIN NUMBER" COLUMN_NUMBER = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 5 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The bin number, starting with 1 for rocks which could not be assigned to a bin (undefined) and 2 for rocks with the smallest average diameter (less than 0.008 m). Bin number increases monotonically to the largest bin number (18), which corresponds to rocks with average diameter greater than or equal to 1.414 m. Rocks having burial state 'buried' (3) and for which height (H) is one of the dimensions required for calculation are assigned to bin 1 since the results are not considered to be reliable. The field is left blank for summary lines in the table (rocks of all diameters)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LOWER BIN BOUNDARY" COLUMN_NUMBER = 4 DATA_TYPE = ASCII_REAL START_BYTE = 8 BYTES = 5 FORMAT = "F5.3" UNIT = "METER" DESCRIPTION = "The lower boundary for the bin. Rocks in this bin must have average diameters greater than or equal to this value. Left blank if bin number 1 (rocks with undefined average diameter) or bin number 2 (rocks with average diameters less than 0.008)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UPPER BIN BOUNDARY" COLUMN_NUMBER = 5 DATA_TYPE = ASCII_REAL START_BYTE = 14 BYTES = 5 FORMAT = "F5.3" UNIT = "METER" DESCRIPTION = "The upper boundary for the bin. Rocks in this bin must have average diameters less than this value. Left blank if bin number 1 (rocks with undefined average diameter or bin number 18 (rocks with average diameters greater than or equal to 1.414)." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SURFACE AREA" COLUMN_NUMBER = 6 DATA_TYPE = ASCII_REAL START_BYTE = 20 BYTES = 7 FORMAT = "F7.4" UNIT = "SQUARE METER" DESCRIPTION = "The surface area covered by rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "N_AREA" COLUMN_NUMBER = 7 DATA_TYPE = ASCII_INTEGER START_BYTE = 28 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "Number of rocks contributing to the surface area in Column 6." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARLW AVERAGE" COLUMN_NUMBER = 8 DATA_TYPE = ASCII_REAL START_BYTE = 32 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" DESCRIPTION = "The average width-to-length axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARLW STANDARD DEVIATION" COLUMN_NUMBER = 9 DATA_TYPE = ASCII_REAL START_BYTE = 37 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" DESCRIPTION = "The standard deviation of the width-to-length axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "N_ARLW" COLUMN_NUMBER = 10 DATA_TYPE = ASCII_INTEGER START_BYTE = 42 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "The number of rocks contributing to the average axial ratio in Column 8." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARWH AVERAGE" COLUMN_NUMBER = 11 DATA_TYPE = ASCII_REAL START_BYTE = 46 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" INVALID_CONSTANT = -9.9 DESCRIPTION = "The average width-to-height axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARWH STANDARD DEVIATION" COLUMN_NUMBER = 12 DATA_TYPE = ASCII_REAL START_BYTE = 51 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" INVALID_CONSTANT = -9.9 DESCRIPTION = "The standard deviation of the width-to-height axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "N_ARWH" COLUMN_NUMBER = 13 DATA_TYPE = ASCII_INTEGER START_BYTE = 56 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "The number of rocks contributing to the average axial ratio in Column 11." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARLH AVERAGE" COLUMN_NUMBER = 14 DATA_TYPE = ASCII_REAL START_BYTE = 60 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" INVALID_CONSTANT = -9.9 DESCRIPTION = "The average height-to-length axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ARLH STANDARD DEVIATION" COLUMN_NUMBER = 15 DATA_TYPE = ASCII_REAL START_BYTE = 65 BYTES = 4 FORMAT = "F4.2" UNIT = "N/A" INVALID_CONSTANT = -9.9 DESCRIPTION = "The standard deviation of the height-to-length axial ratio for rocks in this bin." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "N_ARLH" COLUMN_NUMBER = 16 DATA_TYPE = ASCII_INTEGER START_BYTE = 70 BYTES = 3 FORMAT = "I3" UNIT = "N/A" DESCRIPTION = "The number of rocks contributing to the average axial ratio in Column 14." END_OBJECT = COLUMN END_OBJECT = TABLE END