Data Set Overview : This dataset contains color mosaics produced from Pancam images  of the Mars Exploration Rover mission. These products were  generated by Jim Bell and Jonathan Joseph of the Pancam science  team. Processing : Individual raw Pancam Experiment Data Records (EDRs) were  calibrated to radiance, radiance factor, and estimated Lambert  Albedo following the methods described in BELLETAL2006. They were  then map projected into simple cylindrical and/or vertical  projection mosaics using software specifically designed for  mosaicking of MER/Pancam images, and developed under the direction  of Pancam Payload Element Lead Prof. Jim Bell. The mapping  software uses information from the geometric calibration of the  cameras to correct for slight lens distortions. Slight variations  in lighting conditions among images within a mosaic have been  corrected using small automated and/or manual multiplicative  scaling of individual frames to achieve output mosaics that are as  seamless as possible. Large variations in lighting conditions, for  example in mosaics spanning a large range of Martian local solar  time or spanning multiple Martian days, have not been corrected.  Additional post-processing using commercial image processing tools  like Adobe Photoshop has been applied to many of these mosaics in  order to filter out single or small groups of 'hot pixels' or to  attempt to manually correct particularly harsh seam boundaries.  For some mosaics including the horizon, choppy or limited coverage  of the sky has been replaced with a representation of the way the  sky would have appeared if the coverage had been complete, using  actual sky colors from the data's original partial sky coverage.  These archived mosaics were created primarily for public education  and outreach purposes, and have been created in false color,  approximate true color, and red/blue 3-D anaglyph representations.  Substantial additional information and details about these mosaics  can be found online on the Pancam Home web site at  http://pancam.sese.asu.edu/, following the 'Images' link.  Additional details about true color representations of the Martian  landscape can be found in BELLETAL2006 and BELLETAL2006B. While  they can serve some potential scientific interests (such as basic  assessments of geology and geomorphology), because of the  sometimes rather qualitative post-processing applied to many of  these Pancam mosaics, they should not be used for quantitative  image analysis work.  File Naming : The PDS file naming scheme adopted for these mosaics begins with  either a target name assigned by the MER team, the name of the  large-format mosaic or panorama assigned by the MER team, or a  simple sol, rover (A : Spirit, B : Opportunity), and Pancam  sequence designator (Pnnnn). This is often followed by a brief  indicator of the specific camera (L : left or R : right) and  filter (numbers 1-7) indicator, using the filter designation codes  described in BELLETAL2003. Finally, a designator is often provided  to identify the image as a false color composite (F), an  approximate true color composite (ATC), or an anaglyph (ANA or  STEREO) intended to be viewed with red/blue glasses (red on the  left). For example: SOL2642B_P2354_L257F:  Opportunity sol 2642, Pancam sequence 2354, left camera, false  color composite RGB from filters L2, L5, and L7. SOL661A_P2401_L256ATC:  Spirit sol 661, Pancam sequence 2401, left camera, approximate  true composite RGB from filters L2, L5, and L76. THANKSGIVING_STEREO:  The Spirit rover's 'Thanksgiving Panorama', details of which  can be found at http://pancam.sese.asu.edu/, following the  'Images' link, choosing the '360 deg. Panoramas' link, then  clicking on the 'Thanksgiving Pan' link. BURNS_CLIFF_L257F.TIF:  The Opportunity rover's 'Burns Cliff' mosaic, details of which  can be found at http://pancam.sese.asu.edu/, following the  'Images' link, choosing the 'Small Panoramas and Mosaics'  link, then clicking on the 'Burns Cliff 180 deg.' link. This  is a false color mosaic acquired in the Pancam left camera's  filters L2, L5, and L7.   Point of Contact for More Details : Prof. Jim Bell School of Earth & Space Exploration  Arizona State University  Box 876004, Tempe, AZ 85287-6004  email: Jim.Bell@asu.edu Office: (480) 965-1044

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