Calibrated Images

• Calibrated versions of each Cassini ISS image from the Saturn encounter phase can be downloaded from OPUS search results.

• You also can access calibrated versions of each Cassini ISS image from the Saturn encounter phase, organized by volume number, from the the table on the Accessing Data tab.

Calibration Software

Calibration software, the most recent version of CISSCAL is available on the COISS_0011 volume. The entire volume can be downloaded by right clicking here (tar.gz format).

For discussions of available ISS calibration and image analysis software, see ISS Software.

Calibration Files

The calibration documents and pre-flight ground calibration images are contained on volumes COISS_0001-0010.

Documentation

Detailed information on the various calibration tests is contained in the complete set of documents found in the documents/COISS_0xxx directory on each volume. These include:

• The ISS Users’ Guide (pdf) is the primary reference for ISS calibration.

• See: Knowles, West, Helfenstein, Verbiscer, Wilson, and Porco, “End-of-mission calibration of the Cassini Imaging Science Subsystem”. Planetary and Space Science, vol 185, ,article id. 104898 June 2020. DOI 10.1016/j.pss.2020.104898.

• The ISS Calibration Report: report.

• The in-flight calibration plan: pdf or TeX.

• Calibration theoretical basis report: pdf or TeX.

• An alternate Distortion Model for Cassini ISS: Owen, 2003, ISS Distortion Model 1.

Calibration Data

The calibration test data are found within the data directory tree on volumes COISS_0001-0010.

On each Volume, separate subdirectories contain data for the narrow-angle and wide-angle cameras (NACFM and WACFM respectively). Within each of these directories, subdirectories are named to indicate which test the enclosed data supports.

The table below indicates where to find calibration data for a particular

camera and test.

• Clicking on the VOLUME_ID will allow you to browse the volume.

• To download an entire volume, right click on that volume’s “Bundle” link in the second row of each section.

The bundled volumes are provided in tar.gz format.

Narrow Angle Camera:

Wide Angle Camera: