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Naming conventions and Directory Structure

Raw image files are named Cnnnnnnn.IMQ, where 'nnnnnnn' is the FDS count (without a decimal point) and "IMQ" indicates that the file is a compressed image. Generally, for the Jupiter encounter, images beginning with 1 are from Voyager 1 and those beginning with 2 are from Voyager 2. Similarly, for the Saturn encounter, images beginning with 3 are from Voyager 1 and those beginning with 4 are from Voyager 2. The Voyager 2 FDS clock was reset prior to the Uranus and the Neptune encounters. Consequently the FDS counts, and therefore filenames, for these encounters are numerically smaller than those for the Saturn encounter.

The images are stored in subdirectories named for the nominal target of the observation. Many images contain more than one target and some images missed their intended target, so the directory structure provides nothing more than general guidance about the contents of the images.

For details on the volume structure and file naming conventions, please review a Voyager ISS AAREADME.TXT file (especially section 4). This file (with minor header variations) appears in the root directory of every volume.

This link, Calibration notes provides references for Voyager image calibration.

The following links are to hypertext versions of representative VOLINFO.TXT, DATASET.CAT and REF.CAT files. These files are included on every volume.

This link provides access to the narrow angle and wide angle camera descriptions.

Getting the Data You want