urn:nasa:pds:vl_rocks:data_derived:vl0rocks 1.0 1.21.0.0 Product_Observational 2024-04-03 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 vl0rocks.csv 1996-04-01T12:00:00 0 PDS DSV 1 This table contains rock population data derived from Viking Lander 1 (VL1) images, maps derived from images,and other data. Each row in the table contains an ID keyed to hand-drawn overlays for the atlas of lander images [LIEBES, 1982], the XYZ coordinates of the rock in the Local Gravity-Normal (LGN) coordinate frame defined by [LIEBES, 1982], estimates of the dimensions of the rock and its orientation, a subjective evaluation of its burial state, and miscellaneous notes such as names associated with certain well-known rocks. These data were compiled by Henry Moore and John Keller [MOORE and KELLER, 1990; 1991]; minor updates were made to values in the investigators' original file ROCKMOO1.DAT were made and burial status was added where available prior to archiving. This file is the same as file vl1rocks.csv except that two 'outcrops' have been omitted. 425 Carriage-Return Line-Feed Comma 11 0 rock id 1 ASCII_String The ID number of the rock, assigned during inventory and measurement by investigators Moore and Keller. An ID beginning with the letters OC indicates a possible outcrop. The ID is unique to an overlay used by the investigators, but is not necessarily unique for the landing site; for example, two rocks at VL1 have the ID 'D 1'. type 2 ASCII_String The type of area where the rock was situated. Allowed values include: N = The near field - the surface accessible to the lander sampler arm (extending to approximately 3 m in front of the lander). The near field covers 12.75 square meters. F = The far field - the surface beyond the range of the sampler arm but for which rock position and dimensions could be reliably estimated (beyond approximately 3 m but less than 9-15 m in front of the lander). Does not include rocks in drift areas. The far field covers 42.83 square meters. D = Drift areas - surface at 3-15 m from the lander that was covered with significant amounts of drift material and where small rocks were not seen. Drift areas cover 28.09 square meters. X = Excluded from rock population counts (usually by being in a special location, such as under a lander foot pad). x position 3 ASCII_Real meter The X position of the center of the rock in the LGN frame defined by [Liebes, 1982]. y position 4 ASCII_Real meter The Y position of the center of the rock in the LGN frame defined by [Liebes, 1982]. z position 5 ASCII_Real meter The Z position of the center of the rock in the LGN frame defined by [Liebes, 1982]. length 6 ASCII_Real meter Estimated longest dimension of the rock. width 7 ASCII_Real meter Estimated width of the rock, measured approximately orthogonal to the length and in a plane parallel to the local average surface. height 8 ASCII_Real meter The height of the rock above the immediately adjacent regolith, measured approximately orthogonal to the length and width; the vertical exposure of the rock. angle 9 ASCII_Real degree Azimuth of the rock, measured clockwise from the LGN Y-axis to the long axis of the rock. A value 000 or 999 indicates that the azimuth was not determined; a value of 365 indicates that the length and width are equal. burial 10 ASCII_String Subjective classification of burial state of the rock. Allowed values include: P = Perched (not significantly buried) H = Partially buried B = Buried U = Unknown (not tabulated) notes 11 ASCII_String Names of rock (if assigned) or other notes. In most cases, the field is held by 23 ASCII blank characters plus enclosing double quotes.