CRISM (Compact Reconnaissance Imaging Spectrometer for Mars) is a hyperspectral imager on the MRO (Mars Reconnaissance Orbiter) spacecraft.  MRO's objectives are to recover climate science originally to have been conducted on the Mars Climate Orbiter (MCO), to identify and characterize sites of possible aqueous activity to which future landed missions may be sent, and to characterize the composition, geology, and stratigraphy of Martian surface deposits. MRO will operate from a sun-synchronous, near- circular (255x320 km altitude), near-polar orbit with a mean local solar time of 3 PM. CRISM's spectral range spans the ultraviolet (UV) to the mid-wave infrared (MWIR), 362 nm to 3920 nm. The instrument utilizes a Ritchey-Chretien telescope with a 2.12 degree field-of-view (FOV) to focus light on the entrance slit of a dual spectrometer. Within the spectrometer, light is split by a dichroic into VNIR (visible-near-infrared, 362-1053 nm) and IR (infrared, 1002-3920 nm) beams. Each beam is directed into a separate modified Offner spectrometer that focuses a spectrally dispersed image of the slit onto a two dimensional focal plane (FP). The IR FP is a 640 x 480 HgCdTe area array; the VNIR FP is a 640 x 480 silicon photodiode area array. The spectral image is contiguously sampled with a 6.55 nm spectral spacing and an instantaneous field of view of 61.5 microradians. The Optical
Sensor Unit (OSU) can be gimbaled to take out along-track smear, allowing long integration times that afford high signal-to-noise ratio (SNR) at high spectral and spatial resolution. The scan motor and encoder are controlled by a separately housed Gimbal Motor Electronics (GME) unit. A Data Processing Unit (DPU) provides power, command and
control, and data editing and compression.

extracted metadata from PDS3 catalog and
                    modified to comply with PDS4 Information Model

COMPACT RECONNAISSANCE IMAGING SPECTROMETER FOR MARS for MRO

ACCELEROMETER for MRO

CONTEXT CAMERA for MRO

HIGH RESOLUTION IMAGING SCIENCE EXPERIMENT for MRO

MARS COLOR IMAGER for MRO

MARS CLIMATE SOUNDER for MRO

RADIO SCIENCE SUBSYSTEM for MRO

SHALLOW RADAR for MRO

MARS RECONNAISSANCE ORBITER

NAIF ID 499

Mars

MRO CRISM

Description

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