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Sample Analysis at Mars (SAM) Instrument Suite





The Sample Analysis at Mars (SAM) instrument, at NASA's Goddard Space Flight Center, Greenbelt, Md., will analyze samples of material collected by the rover's arm.
Sample Analysis at Mars for Curiosity
The Sample Analysis at Mars (SAM) instrument, at NASA's Goddard Space Flight Center, Greenbelt, Md., will analyze samples of material collected by the rover's arm.

The Sample Analysis at Mars instrument suite takes up more than half the science payload on board the Mars Science Laboratory rover and features chemical equipment found in many scientific laboratories on Earth. Provided by NASA's Goddard Space Flight Center, Sample Analysis at Mars will search for compounds of the element carbon, including methane, that are associated with life and explore ways in which they are generated and destroyed in the martian ecosphere.

Actually a suite of three instruments, including a mass spectrometer, gas chromatograph, and tunable laser spectrometer, Sample Analysis at Mars will also look for and measure the abundances of other light elements, such as hydrogen, oxygen, and nitrogen, associated with life.

The mass spectrometer will separate elements and compounds by mass for identification and measurement. The gas chromatograph will heat soil and rock samples until they vaporize, and will then separate the resulting gases into various components for analysis. The laser spectrometer will measure the abundance of various isotopes of carbon, hydrogen, and oxygen in atmospheric gases such as methane, water vapor, and carbon dioxide. These measurements will be accurate to within 10 parts per thousand.

Because these compounds are essential to life as we know it, their relative abundances will be an essential piece of information for evaluating whether Mars could have supported life in the past or present.


An instrument suite that will analyze the chemical ingredients in samples of Martian atmosphere, rocks and soil during the mission of NASA's Mars rover Curiosity, is shown here during assembly at NASA Goddard Space Flight Center, Greenbelt, Md., in 2010.
Sample Analysis at Mars Instrument, Side Panels Off (Annotated)
An instrument suite that will analyze the chemical ingredients in samples of Martian atmosphere, rocks and soil during the mission of NASA's Mars rover Curiosity, is shown here during assembly at NASA Goddard Space Flight Center, Greenbelt, Md., in 2010.

The Sample Analysis at Mars (SAM) instrument for NASA's Mars Science Laboratory mission will study chemistry of rocks, soil and air as the mission's rover, Curiosity, investigates Gale Crater on Mars.
SAM Instrument at NASA Goddard Space Flight Center
The Sample Analysis at Mars (SAM) instrument for NASA's Mars Science Laboratory mission will study chemistry of rocks, soil and air as the mission's rover, Curiosity, investigates Gale Crater on Mars. Image credit: NASA

Related Links

Curiosity's Sample Analysis at Mars:
Official Site >>

For Scientists
Technical Information About SAM >>

This interactive allows users to see how Curiosity's Sample Analysis at Mars experiment works.

Getting to Know SAM

This interactive allows users to see how Curiosity's Sample Analysis at Mars experiment works.

Choose your martian sample adventure and learn about how Curiosity processes soil and atmospheric samples.

Choose Your Sample Adventure

Choose your martian sample adventure and learn about how Curiosity processes soil and atmospheric samples.




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