Abstract
A videometer allows the determination of relative position and attitude of a moving rigid body (chaser) in space, particularly for a relative approach movement towards another body (target). The videometer is installed at the chaser and a defined retro reflector configuration is mounted on the target spacecraft. The three-dimensional target configuration is illuminated by the chaser. The image sensor records the reflected light. The x-y coordinates of the light points are used to calculate relative position and attitude by means of a follow-up control loop, which processes the data from the image sensor to the state variables used for rendezvous and docking control.
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