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
-
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. User selected data files can be bundled as zip files for easy downloading.
-
The table below gives direct online access to the individual volumes.
-
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.
The compressed volumes are provided in .tar.gz format. For information on
opening files of this type, click
here
.
- Clicking on the corresponding “Browse” link will take you to the browse directory for the specified volume. Most volumes contain their own browse images. The exceptions are: