About CIRS Data
![[SPACER]](../css/spacer.gif)
1. Organization
- The CIRS archive consists of three, multi-volume data sets. One
data set covers the Jupiter encounter, and the other two span the
entire Saturn portion of the mission. The two Saturn data sets contain
exactly the same data in two different formats.
- The archive volumes contain CIRS data products: raw data
(interferograms) and calibrated data (spectra), with associated
pointing, navigation and spacecraft orientation information,
instrument documentation, calibration files, calibration
algorithms, representative software for handling the CIRS data
files, and documentation necessary to produce higher level
calibrated products.
2. Data Formats
The CIRS data volumes delivered by the team involve variable
length files in a rather complicated file structure. We are producing
parallel volumes for the Saturn encounter containing re-formatted data
and metadata designed to simplify access to the data. Consequently there
are two data sets for the Saturn encounter easily distinguished by the
first numerical digit in the volume IDs:
- COCIRS_0nnn indicates a volume in the original format.
- COCIRS_5nnn indicates the corresponding re-formatted volume.
In the re-formatted version, the files have been converted from
variable-length to fixed-length formats. ASCII versions of most binary
files are also provided. In addition, file boundaries have been
adjusted so that the data and metadata (timing and geometry
information) associated with individual Cassini activities and with
individual CIRS focal planes are found within a single set of files;
no file contains information from more than one activity or one focal
plane.
The following two links provide more detailed information on the
original and re-formatted data respectively.
- Original Format - details and
additional format specific documentation for the original structure.
- Re-formatted - details and
additional format specific documentation for the re-formatted structure.
