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TDI

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  1. [remote sensing] Acronym for time delay integration. In remote sensing, a method used to gather energy in a pixel of a focal plane using electronic shuttering. As the sensor moves, the pixel receives information for a fixed period (dwell time) and is then read out and reset. Carefully synchronized with the speed of the sensor, the ground sample distance (GSD) of the pixel, and the exposure required to form a good signal.

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