Mission Elapsed Time
What is CRISM?
The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is 1 of 6 science experiments on the Mars Reconnaissance Orbiter, which takes measurements of both the surface and the atmosphere of Mars.
CRISM data are used to find minerals’ spectral signatures on Mars. Different minerals form in different settings, ranging from ancient lakes and deltas to volcanic lava flows. We use the mineral evidence to understand how different geologic processes have shaped the planet over time. CRISM also observes the polar ice caps and atmosphere to understand seasonal and year-to-year variations in the Martian weather.
June 15, 2016
May 3, 2016
March 17, 2016
Read about the career paths that led members of the CRISM team into space exploration.
CRISM Spectral Library
The MRO CRISM Spectral Library is an analysis tool for interpreting CRISM data. it currently contains 2,260 spectral analyses of 1,134 Mars-analog samples, all measured under desiccating conditions so that materials that adsorb water look as they would on Mars. This was made avaialble to the community through the PDS on the day that MRO entered Mars orbit!
Hi-Res Image Map
Why does CRISM need two separate detectors?
At the time CRISM was built, no single detector was sensitive to light across the full 400 to 4000 nanometer wavelength range. It needed two separate spectrometers that share a common telescope, each with its own detector, to observe both the infrared (IR) wavelengths and visible/ near-infrared (VNIR) wavelengths. Some minerals that CRISM detects are only distinctive at VNIR wavelengths but others have the majority of their diagnostic features at IR wavelengths. Since CRISM was built, new technology has been developed that can respond to CRISM's full wavelength range on a single detector.
MSL Site Selection
CRISM has been supporting landing site selection for the Mars Science Laboratory (MSL) mission with hundreds of observations that have been converted to color and mineral indicator maps. [ more ]
In its high-resolution "targeted" operating mode, in less than 3 minutes CRISM can acquire a hyperspectral image covering 100-200 square kilometers. In its lower-resolution mapping or "survey" mode, it takes a long multispectral image strip every 3 minutes that covers about 60,000 square kilometers.