This data set
      contains map projected data products acquired by the
      HRSC camera on the Mars Express spacecraft, covering the orbits
      23997 to 29016.
      As part of the processing compressed images are decompressed and
      radiometrically calibrated (CODMAC level 3). After this the images
      are converted to 8 bit using a histogram optimized lookup table.
      Then the optical distorsion is corrected. As the last step the images
      are map projected. The type of the map projection depends on the
      latitude of the image center and the extent of the image.
      Additional geometric information (e.g. footprint and illumination
      angles) are calculated and included into the image label.
      Images without useable content (e.g. completely saturated images)
      are omitted from the data set.

The HRSC data pipeline, and
    therefore all data provided in this data set, has passed through
    peer review and PSA level validations.