urn:nasa:pds:vl_rocks:data_derived:vl1surfs 1.0 1.21.0.0 Product_Observational 2024-04-02 1.0 Initial PDS4 product label 1976-07-20Z 1982-12-31Z Viking Mission urn:nasa:pds:context:investigation:mission.viking data_to_investigation Viking Lander 1 Host urn:nasa:pds:context:instrument_host:spacecraft.vl1 is_instrument_host Camera 1 for VL1 Instrument urn:nasa:pds:context:instrument:cam1.vl1 is_instrument Camera 2 for VL1 Instrument urn:nasa:pds:context:instrument:cam2.vl1 is_instrument Mars Planet urn:nasa:pds:context:target:planet.mars data_to_target vl1surfs.csv 1998-05-11T18:00:00.000 0 PDS DSV 1 This file contains summary statistics on rock distributions at the Viking Lander 1 site according to surface type. The table gives number of rocks and their surface area as a function of rock diameter and surface type. The values were derived from table vl1axrat.csv. Bin boundaries were set at 1/128th meter and at powers of SQRT(2) larger (0.008, 0.011, ... , 1.000, 1.414 m). Rocks were sorted into bins according to diameter, the area covered was estimated, and running sums were computed for three surface types (drift material, far field, and near field). Total area for each surface type at VL1 was: 15.27 square meters (drift material) 57.85 square meters (far field) 10.48 square meters (near field) The inter-rock area in the far field was 56.1745 square meters, where inter-rock was taken to mean area not covered by a rock of diameter 0.25 meters or larger. Inter-rock area in the near field was 10.4240 square meters. Ratio of the total inter-rock area (far field plus near field) to the near field inter-rock area was 6.3890. 17 Carriage-Return Line-Feed Comma 13 0 diameter 1 ASCII_Real meter The threshold rock diameter for this size bin. Rocks with average diameter smaller than this value are not counted in this row or any of the rows above. nrocks - drift material 2 ASCII_Real Number of rocks larger than diameter that have been added since the count at the next larger diameter. cum_nrocks - drift material 3 ASCII_Real Cumulative number of rocks larger than diameter in the VL1 measured population. bin area - drift material 4 ASCII_Real meter^2 Area added by the rocks in this bin. cumulative area - drift material 5 ASCII_Real meter^2 Cumulative area covered by rocks with this diameter and larger. nrocks - far field 6 ASCII_Real Number of rocks larger than diameter that have been added since the count at the next larger diameter. cum_nrocks - far field 7 ASCII_Real Cumulative number of rocks larger than diameter in the VL1 measured population. bin area - far field 8 ASCII_Real meter^2 Area added by the rocks in this bin. cumulative area - far field 9 ASCII_Real meter^2 Cumulative area covered by rocks with this diameter and larger. nrocks - near field 10 ASCII_Real Number of rocks larger than diameter that have been added since the count at the next larger diameter. cum_nrocks - near field 11 ASCII_Real Cumulative number of rocks larger than diameter in the VL1 measured population. bin area - near field 12 ASCII_Real meter^2 Area added by the rocks in this bin. cumulative area - near field 13 ASCII_Real meter^2 Cumulative area covered by rocks with this diameter and larger.