Data Set Overview : This data set contains data to help understand the fine-scale morphology, reflectance, and texture of rock surfaces and soil as well as the accumulation of dust on the capture and filter magnets. Several types of imaging data products can be created onboard the rover. Image data volume can be reduced by summing rows or columns, subframing (or windowing), or downsampling. Because the goal of MI observations is to resolve small features on Mars, row or column summing is not likely to be performed on MI images. However, subframing (selecting a part of the image for downlink) and/or downsampling (calculating a mean or median of pixels in specified blocks) can be used to reduce MI data volume for downlink. Subframe products are defined by starting row and column and by number of rows and columns. Downsampling can be used to create a thumbnail version of an image for rapid downlink and assessment on the ground. If the thumbnail indicates that the image is of scientific interest, the full-resolution image can be later returned to Earth. A histogram of the image data can also be generated and returned to Earth as a separate product. Reference pixels are returned as a separate product if requested.  Note: MI Science RDR products generated during the first 30 sols of the MER mission were incorrectly labeled with the wrong data set ID, MERn-M-MI-2-RDR-SCI-V1.0 instead of MERn-M-MI-3-RDR-SCI-V1.0. The latter is the correct data set ID, as the products have level 3 processing.   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.  There may be multiple versions of a MER Camera RDRs.   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. The RDR data products that serve operational needs are explained below.  1) Radiometrically Corrected RDR The MIPLRAD method is a radiometric correction performed by MIPL (OPGS) at JPL. It can apply to any of the camera instruments, but only the RAD (and RAL) type is generated. MIPLRAD first backs out any onboard flat field that was performed. It then applies the following corrections: flat field, exposure time, temperature-compensated responsivity. The result is calibrated to physical units for MER of W/m^2/nm/sr. MIPLRAD is a first-order correction only and should be considered approximate.  2) XYZ RDR An XYZ file contains 3 bands of 32-bit floating point numbers in the Band Sequential order. Alternatively, X, Y and Z may be stored in separate single-band files.  The pixels in an XYZ image are coordinates in 3-D space of the corresponding pixel in the reference image. This reference image is traditionally the left image of a stereo pair, but could be the right image for special products. The geometry of the XYZ image is the same as the geometry of the reference image. This means that for any pixel in the reference image the 3-D position of the viewed point can be obtained from the same pixel location in the XYZ image. The 3-D points can be referenced to any of the MER coordinate systems (specified by DERIVED_IMAGE_PARAMS Group in the PDS label). Most XYZ images will contain 'holes', or pixels for which no XYZ value exists. These are caused by many factors such as differences in overlap and correlation failures. Holes are indicated by X, Y, and Z all having the same specific value. This value is defined by the MISSING_CONSTANT keyword in the IMAGE object. For the XYZ RDR, this value is (0.0,0.0,0.0).   Software : MER Camera Payload downlink processing software is focused on rapid reduction, calibration, and visualization of images in order to make discoveries, to accurately and expeditiously characterize the geologic environment around the rover, and to provide timely input for operational decisions concerning rover navigation and Instrument Deployment Device (IDD) target selection. Key software tools have been developed at Cornell University, at JPL by the MIPL, SSV, and APSS groups, at NASA Ames, and at the USGS/Flagstaff. These tools can also be used to process MI images (see below), as well as Navcam and Hazcam images, which have substantial scientific potential in addition to their operational importance  PDS-labeled images and tables can be viewed with the program NASAView, developed by the PDS and available for a variety of computer platforms from the PDS web site http://pdsproto.jpl.nasa.gov/Distribution/license.html. There is no charge for NASAView.  Media/Format : The data set will initally be delivered and kept online. Upon Mission completion, the Microscopic Imager RDRs will be delivered to PDS on DVD.

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