PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1998-07-01 INTERCHANGE_FORMAT = ASCII NOTE = "Textual description of the GAZETTER.TAB file which contains a description of the named features at the Mars Pathfinder landing site." END_OBJECT = TEXT END This table is a gazetteer of the names informally assigned to many of the rocks and other local small features visible near the Mars Pathfinder landing site. The features were named for ease of reference by the science team and others involved in the mission. Note that unlike large-scale planetary features viewed from orbit, none of these features have been approved by the International Astronomical Union (IAU). The structure of the table is adapted from the GAZETTER.TAB format used for names of planetary features visible from orbit. It differs in several ways: 1. The data provided consists of width and height in meters, and location in meters relative to the lander, measured in the Mars Local Level coordinate frame (M frame). (See [MELLSTROM&LAU1996] for details.) 2. Since the names are not proposed as official feature names to be approved by the IAU, no status or approval date is given. 3. The origin of the names was not documented, due to the extremely informal nature of name submission. Many of the names come from internationally known (usually U.S. origin) cartoon characters. Most of the rest are simply English words, often inspired by shape or color as viewed from the lander. 4. There is no standard IAU name for feature types the size of rocks, so the FEATURE_TYPE field does not conform to the usual standard. 5. Mapping-related columns are omitted. The width and height of the features was estimated by manually 'measuring' the rocks in a virtual environment called MarsMap, developed at NASA Ames Research Center by Ted Blackmon. The size and location estimates depend upon the distance from the lander, which was determined by an automatic stereo matching algorithm, developed at NASA Ames Research Center by Eric Zbinden. Virtual measurements were done primarily by Carol Stoker and Ted Blackmon (on all rocks labeled at the time by Nathan Bridges from the suggested names), and later by Albert Haldemann, who also measured many unnamed rocks, not included in this table. The table and descriptions were produced by Bob Kanefsky and submitted to the science team for review. Only rocks that were named early, whose names were available in machine-readable format, are included in this table. Large features like the Twin Peaks are not included in the table since their size was not determined by the same mechanism. The table contains one row for each feature. The table is formatted so that it may be read directly into many data management systems on various host computers. All fields (columns) are separated by commas, and character fields are enclosed in double quotation marks. Each record consist of 104 bytes, with a carriage return / line feed sequence in bytes 103 and 104. This allows the table to be treated as a fixed length record file on hosts that support this file type and as a normal text file on other hosts. Producers: Ted Blackmon ------------ NASA Ames Research Center, Computational Sciences Division Mail Stop 269-1 NASA Ames Research Center Moffett Field, CA 94035-1000 USA email: blackmon@artemis.arc.nasa.gov Carol Stoker ------------ NASA Ames Research Center, Space Science Division Mail Stop 245-3 NASA Ames Research Center Moffett Field, CA 94035-1000 USA email: cstoker@mail.arc.nasa.gov Albert Haldemann ---------------- Jet Propulsion Laboratory, Communication Systems Research Section Mail Stop 238-420 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109-8099 USA email: albert.haldemann@jpl.nasa.gov Eric Zbinden ------------ NASA Ames Research Center, Computational Sciences Division Mail Stop 269-1 NASA Ames Research Center Moffett Field, CA 94035-1000 USA email: zbinden@artemis.arc.nasa.gov Bob Kanefsky ------------ NASA Ames Research Center, Computational Sciences Division Mail Stop 269-2 NASA Ames Research Center Moffett Field, CA 94035-1000 USA email: kanef@ptolemy.arc.nasa.gov Nathan Bridges -------------- Jet Propulsion Laboratory, Earth and Space Sciences Division Mail Stop 230-235 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109-8099 USA email: nathan.bridges@jpl.nasa.gov