The Cassini Ultraviolet Imaging Spectrograph (UVIS) has two spectrographic channels that provide images and spectra covering the ranges from 56 to 118 nm and 110 to 190 nm. A third optical path with a solar blind CsI photo cathode is used for a high signal-to- noise ratio, stellar occultation by rings and atmospheres. A separate hydrogen deuterium absorption cell measures the relative abundance of deuterium and hydrogen from their lyman-alpha emission.

Cassini UVIS Data Users Guide

The UVIS Occultations of Saturn’s Rings

  • The PDS Rings node has a dataset of Saturn ring radial profiles derived from UVIS stellar occultation data obtained during the prime mission. The data include ring radial profiles at 1 and 10 km resolution from more than 50 UVIS stellar occultations. A few errors in the data have been identified and are listed in the ERRATA.TXT file in the root directory of the volume.

  • You may browse the dataset COUVIS_8001, or download the entire dataset COUVIS_8001 tar.gz.

  • Version 2 of this dataset, which corrects the known errors and expands the dataset coverage to the entire mission, is expected to be available in early 2019.

The UVIS Tabs

The tabs associated with this page describe the UVIS data files and how to obtain and use them.

  • About UVIS Data - Discussion of the organization of the archive and links to key documents.
  • Finding Data - Suggestions on how to search the archive for specific data.
  • Access UVIS Data - Links to the data volumes - organized by data set and by temporal coverage.
  • UVIS Software - Discussion of, and links to, available UVIS calibration and image analysis software.