Users are advised to use caution as this data set has not yet completed peer review. Please notifiy the PDS Rings Node if you find any errors or have recommendations to improve the data set.

Overview

The PDS Rings Node has produced a new multivolume Voyager ISS data set of the Saturn encounter data. The volume IDs are VGISS_xxxx as opposed to the originally distributed volumes with IDs VG_xxxx. Each volume in the new data set contains raw, calibrated and geometrically corrected versions of Voyager images. There is a one- to-one correspondence between the base FDS numbers contained in these volumes and in their counterpart volumes in the originally distributed, raw only, data set (e.g., VGISS_0004 covers exactly the same FDS range as VG_0004).

Additional volumes will be prepared in the near future covering the Uranus, Neptune and Jupiter encounters.

Users are strongly encouraged to review the TUTORIAL.TXT file found in the documents directory of each volume. This file provides a comprehensive guide to the data in this data set.

Identifying the Data You want

The one-to-one correspondence between the calibrated volumes and the original raw image volumes, means that one can use the existing Rings Node Search options. These use the original raw image catelogs. Once you identify the desired raw images or raw image volume, then merely adjust the filename or volume ID to obtain images from the calibrated data set (e.g., VGISS_0004 covers exactly the same FDS range as VG_0004).

Naming conventions

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

Getting the Data You want

The individual volumes, even zipped, are very large; consequently we have divided each volume into four zip archives. Each zipped fragment contains all documentation files from the full volume and all of the data files at one of four processing levels: raw, cleaned, calibrated, or geometrically corrected. The first two types are typically ~ 500MB, the last two are ~1-2 Gbytes. The processing levels are progressive (e.g., geometrically corrected images have also been cleaned and calibrated). For information on processing levels, please see a Voyager calibrated ISS AAREADME.TXT file.

The table below provides direct access to the calibrated volumes and to the zipped subsets of the calibrated volumes.

• Clicking on the VOLUME_ID will take you to the root directory of the volume.
• To download an entire single processing level subset of a given volume, right click in the appropriate 'zip' column.
• Clicking on INDEX.TAB will take you to the index file for that volume. The index file is a twenty one column, ASCII table listing each image on the volume along with some information extracted from that image's label file. Descriptions of the columns can be found in the INDEX.LBL file in the INDEX subdirectory on each volume.

* Volume VGISS_0038 also contains a selection of images in the FDS range 42286.05 to 43568.49 that were missing from earlier volumes