Data Set Overview
      =================

      This data set contains products acquired by the JunoCam
      instrument.

      This data set uses the Committee on Data Management
      and Computation (CODMAC) data level numbering system.
      The JunoCam RDRs are considered Level 3 or Calibrated
      Data (equivalent to NASA Level 1A). The RDRs are corrected
      for instrument signature and converted to scaled radiance.


      Processing
      ==========

      JunoCam products are produced by the junomakepds.py program from
      the format internally used at the JunoCam Mission Operations
      Facility (MOF). This program reads a JunoCam image file, extracts
      information from its headers, formats and attaches the PDS labels,
      and appends the image data.

      The RDR is produced by inverting the onboard 12-to-8-bit companding
      to yield linear data numbers of detector response. A flat field
      correction would also be done at this step, but this is not currently
      implemented as the instrument response is fairly uniform without it.
      For planetary targets these values are then scaled such that a white
      surface at the solar distance at the time of imaging and with the
      commanded exposure time would have a pixel value of 10,000 data
      numbers.

      For images of a black sky, however, this would result in a loss of
      dynamic range, since most pixel values would collapse to 1 or 2 data
      numbers.  Therefore, for such images the RDR values simply represent
      the number of electrons at each pixel.  Since the detector's full
      well capacity is about 30,000 electrons of signal, this value can be
      represented as a 16-bit integer.


      Data
      ====

      All JunoCam images must be a multiple of 16 pixels in both width
      and height. Images are broken up into subimages (also called
      fragments), and each fragment is transmitted separately. Raw and
      predictively compressed images are reconstructed by concatenating
      all of their image fragments and then processing; transform
      compressed images are processed a fragment at a time.  A JunoCam
      data product consists of one image with decompression applied.

      For each image file, a header identifies various properties of
      the image and contains a file offset to the data portion of the
      image. The image data are then appended to the end of the file.

      Refer to the JunoCam Experiment Data Record (EDR) and Reduced Data
      Record (RDR) PDS Data Products Software Interface Specification (SIS)
      for further details on the JunoCam data products.