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How CRISM works: Along-Track Oversampling

How CRISM works: Along-Track Oversampling
How CRISM works: Along-Track Oversampling When the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) acquires images, it gimbals to partially compensate for spacecraft motion, allowing it to gather photons from the ground longer, improving the signal-to-noise ratio (SNR) of the data. If it is gimbaled faster than originally intended, it acquires data that overlaps itself; the resulting "oversampled" data can be processed into smaller pixels, or into better-quality (higher signal-to-noise ratio) images. Courtesy of Ray Arvidson