The VGISS_0nnn volumes have been superseded. Following the peer review
of the Saturn data, we reorganized the data sets, electing to no longer
parallel the volume organization of the original data. The new organization
is essentially chronological, based on FDS count, with the data further
subdivided by planetary system encounter.
VGISS_5nnn: Jupiter encounter observations, where the first digit
after the five is 1 for Voyager 1 and 2 for Voyager 2.
VGISS_6nnn: Saturn encounter observations, where the first digit
after the six is 1 for Voyager 1 and 2 for Voyager 2.
See the table below for direct access to individual volumes.
Overview
Please notifiy us if you
find any errors or have recommendations to improve these data sets.
These new data sets contain data from four processing levels:
Raw Image: uncompressed version of the original file
Cleaned Image: spikes and reseau marks removed
Calibrated Image: dark current subtraction and calibration model applied
Geomed Image: geometrically corrected image
The processing levels are progressive (i.e., geometrically corrected images
have also been cleaned and calibrated). For information on processing levels,
please see a Voyager calibrated ISS TUTORIAL.TXT
file found in the DOCUMENT directory of each volume.
The data directories in the original volumes were sorted by target. In response to
recommendations from the peer review panel for the Saturn data set, the data
directories in the calibrated volumes are sorted by image number.
Each data set is placed on line as quickly as possible - before the
full set of processing steps is complete. The current development
statis is:
VGISS_0xxx_prelim - a "preliminary" data set. Contains all
of the images in at least the raw and cleaned formats;
may also contain calibrated and geometrically corrected images.
The individual image metadata will be available in the VICAR header
for each image, but PDS label files and some additional documentation will
not be present.
VGISS_5xxx, VGISS_7xxx, VGISS_8xxx, - the data sets of Jupiter,
Uranus, and Neptune ready for, or in, peer review.
These contain raw, cleaned, calibrated and geometrically
corrected images. Each image retains its VICAR header and is
accompanied by a PDS label file.
VGISS_6xxx - the Saturn encounter data set is in its final form.
It has completed peer review and lien resolution and now has PDS archive
status "Locally Archived".
Users are strongly encouraged to review the TUTORIAL.TXT and the
PROCESSING.TXT files, located in the DOCUMENT directory of every volume.
These, especially PROCESSING.TXT, change with each encounter, so it is important
to obtain the variation associated with the specific encounter.
The tutorial is a comprehensive guide to the data in these data sets,
and the processing document gives a detailed description of the processing
steps behind the data files in these data sets.
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. NOTE: AAREADME files in preliminary volumes may be incomplete.
Getting the Data You want
Use OPUS, our versatile search
engine to find and retrieve specific Voyager ISS data products
using a wide range of criteria.
Search results are provided with thumbnail images for each
observation, and include options to download compressed raw images,
thumbnail images, tables of associated metadata, and if available
versions of the images in various stages of processing from
uncompressed raw images through fully calibrated and geometrically
corrected images. User selected data files can be bundled as zip files
for easy downloading.
The table below provides direct access to the calibrated
volumes and to available tar.gz files for each volume.
Clicking on the VOLUME_ID will take you to the root
directory of the volume.
To download an entire volume, right click on that
volume's "Compressed Volume" link in the second column.
Generally we do not prepare a compressed version
until the volume is ready for peer review. However, we will
respond as quickly as possible to user requests for such files
of preliminary volumes.
The compressed volumes are provided in .tar.gz format. For
information on opening files of this type, click
here.
Browse links go to directories of 200 X 200 pixel GIF
images.
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.
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