Thermal and Evolved Gas Analyzer

TEGA's design is based on experience gained from the failed Mars Polar Lander.

Soil samples taken from the Martian surface by the robot arm are eventually delivered to the TEGA, where they are heated in an oven to about 1,000 °C.

This spectrometer is adjusted to measure particularly the isotope ratios for oxygen, carbon, nitrogen, and heavier gases.

Major components:[1] The soil was delivered to TEGA by a robotic arm with a scoop.

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