Data Set Overview : Terrain models are a high level product which are derived from the XYZ files and the corresponding image files. The terrain models are generated by meshing or triangulating the XYZ data based on the connectivity implied by the pixel ordering or by a volume based surface extraction. The XYZ files can be viewed as a collection of point data while the terrain models take this point data and connect it into a polygonal surface representation. The original image is referenced by the terrain models as a texture map which is used to modulate the surface color of the mesh. In this way the terrain models can be viewed as a surface reconstruction of the ground near the instrument with the mesh data capturing the shape of the surface and the original image, applied as a texture map, capturing the brightness variations of the surface. Specific terrain model formats such as VST, PFB, DEM and others can be viewed as analogous to GIF, TIFF or VICAR in image space in that each represents the data somewhat differently for slightly different purposes.  The ViSTa (VST) format consists of one terrain model for each wedge (stereo image pair), in a JPL defined binary format suitable for display by SAP. Each file contains meshes at multiple levels of detail.   Processing : MER Camera Payload RDRs are considered Level 3 (Calibrated Data equivalent to NASA Level 1-A), Level 4 (Resampled Data equivalent to NASA Level 1-B), or Level 5 (Derived Data equivalent to NASA Level 1-C, 2 or 3). The RDRs are to be reconstructed from Level 2 edited data, and are to be assembled into complete images that may include radiometric and/or geometric correction.  MER Camera Payload EDRs and RDRs will be generated by JPL's Multimission Image Processing Laboratory (MIPL) under the OPGS subsystem of the MER GDS. RDRs will also be generated by the Athena Pancam Science and Microscopic Imager Science Teams under the SOAS subsystem of the GDS.  RDR data products will be generated by, but not limited to, MIPL using the Mars Suite of VICAR image processing software at JPL, the Athena Pancam Science Team using IDL software at Cornell University and JPL, and the Microscopic Imager Science Team using ISIS software at USGS (Flagstaff) and JPL. The RDRs produced will be processed data. The input will be one or more Camera EDR or RDR data products and the output will be formatted according to this SIS. Additional meta-data may be added by the software to the PDS label.   Data : RDR products generated by MIPL will have a VICAR label wrapped by a PDS label, and their structure can include the optional EOL label after the binary data. RDR products not generated by MIPL may contain only a PDS label. Or, RDR products conforming to a standard other than PDS, such as JPEG compressed or certain Terrain products, are acceptable without a PDS header during mission operations, but may not be archivable.  The RDR data product is comprised of radiometrically decalibrated and/or camera model corrected and/or geometrically altered versions of the raw camera data, in both single and multi-frame (mosaic) form. Most RDR data products will have PDS labels, or if generated by MIPL (OPGS), dual PDS/VICAR labels. Non-labeled RDRs include JPEG compressed products and the Terrain products.   Software : The MIPL Mars Program Suite was used to generate these RDRs.   Media/Format : The data set will initially be delivered and kept online. Upon Mission completion, the Navigation Camera Operations RDRs will be delivered to PDS on DVD.

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