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CRISM is the Compact Reconnaissance Imaging Spectrometer for Mars, a visible-infrared hyperspectral mapper that maps the geology, composition, and layering of surface features on Mars. CRISM data sets are produced by the CRISM Science Team at Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland.

November 30, 2016. MRO Release 39 includes new CRISM TRDR, DDR, LDR, CDR, and EDR data covering May 10 through August 8, 2016.

CRISM Documentation

Read the CRISM Data Product Specification, also known as the CRISM SIS (PDF, 9 MB) for information about the structure and content of CRISM data products. This is essential reading for any CRISM user. Additional help in processing and using CRISM data is available in the presentations from the MRO CRISM Data Users' Workshop.

The CRISM SIS is currently being revised to include descriptions of new product types generated using various CRISM observing modes. More information is in this presentation from the CRISM Team, Brief History of CRISM Observing Modes

Read the CRISM Data Set Specification (PDF, 1.5 MB) for information about the organization of CRISM data sets. There is more than just the data products!

Visit the CRISM Team Web Site at APL for the latest news about CRISM.

CRISM Data Sets

Derived Data Products
MTRDR - Map-Projected Targeted Reduced Data Records contain TER data map-projected using terrain models of the Martian surface.

TER - Targeted Empirical Records contain image cubes derived from CRISM hyperspectral targeted observations, post-processed to standardize the illumination and observation geometry and remove atmospheric gas absorptions and instrument artifacts.

TRDR - Targeted Reduced Data Records contain data calibrated to radiance or I/F.

Version 3 (current version, see below for details):
DDR - Derived Data Records contain information on observation conditions and surface physical properties.
LDR - Limb Data Records are similar to DDRs. They contain supplementary information for TRDR limb observations.

MRDR - Multispectral Reduced Data Records contain multispectral survey data calibrated, mosaicked, and map projected.

MRDR IF and DE data types have been reprocessed using Version 3 of the radiometric calibration software:

Old Version 2 data will be retained until all MRDR data have been reprocessed:

Coverage map of MRDR I/F tiles

Coverage map of MRDR Lambert albedo and summary product tiles

ADR - Ancillary Data Records (to be produced later and included in TRDR archive)
Special Products
The CRISM Spectral Library is a collection of Mars-analog laboratory spectra.

The CRISM Type Spectra Library is a collection of type spectra of minerals identified through CRISM analysis.
Raw Data Products
EDR - Experiment Data Records and CDR - Calibration Data Records

*Note: CDRs in this range have been reprocessed using version 3 software. See Note Regarding TRDR Version 3 Reprocessing below.


Mars Orbital Data Explorer Mars Orbital Data Explorer - Online service that provides search, display, and download  tools for CRISM data, developed by the PDS Geosciences Node
CAT (CRISM Analysis Toolkit) - A collection of ENVI and IDL procedures for reading, displaying, and analyzing CRISM data, produced by the CRISM Science  Team.

- CAT 7.3.1 Complete Download (485 MB zip file)
      Software files only (9.5 MB zip file)
      Auxiliary files only (475 MB zip file)
- CAT 7.3.1 Release Notes (7 KB TXT file)
- CAT 7.3 History String Description (3 KB TXT file)
- CAT Installation Guide (161 KB PDF)
- Introduction to CAT presentation from 3/22/09 workshop (9 MB PDF)
- CAT User's Guide (84 KB PDF)

Interactive CRISM Map - A map-based interface for searching CRISM data products, developed by the CRISM Science Team.

Note Regarding TRDR Version 3 Reprocessing

As of February 9, 2010, the TRDRs (Targeted Reduced Data Records) are being created with version 3 of the CRISM processing software, which includes improved calibration procedures. Compared to version 2 TRDRs, these products have had most artifacts corrected and noise reduced by use of a sophisticated filtering process. The CRISM Team has revised all previously released TRDRs using the improved software. For more information see the revised Data Set Description ( and Software Interface Specification (crism_dpsis.pdf).

The previously released TRDR version 2 products have been taken offline.

CDRs (Calibration Data Records)  have also been reprocessed as part of this effort. The Version 3 CDRs are stored on the EDR volumes in their usual CDR directory, and the Version 2 CDRs that they replace have been taken offline.

Users of TRDR Version 3 products please note: The hyperspectral noise filter applied to the I/F version of CRISM TRDRs in version 3 of the radiometric calibration pipeline is described in this file (PDF, 13.3 MB). The format of the file is a flowchart describing different steps in the filtering process, which is applied to full or half resolution targeted observations (the central swaths of FRT, HRL, or HRS observations). Other products taken with greater levels of pixel binning are not filtered at this time. A future version of the CRISM Data Products SIS will describe the filtering algorithm in greater detail.



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