Sun sensor

Non-linear Sun sensor used by the TET-1 German microsatellite.

A Sun sensor is a navigational instrument used by spacecraft to detect the position of the Sun.[1][2] Sun sensors are used for attitude control, solar array pointing, gyro updating, and fail-safe recovery.[3][4]

In addition to spacecraft, Sun sensors find use in ground-based weather stations and Sun-tracking systems, and aerial vehicles including balloons and UAVs.[2]

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