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 Panoromic Camera Operations RDRs will be
    delivered to PDS on DVD.

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