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Artificial star
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Artificial star
by Staff Writers
Noordwijk, Netherlands (ESA) Sep 08, 2023

Like mariners of old, spacecraft steer by the stars - using combinations of telescopes, cameras and computers called startrackers to recognise stellar constellations to calculate their own position in space.

The test bench seen here generates an artificial star-like light source to test the optical performance of startrackers.

Part of the Guidance and Navigation Control (GNC) Attitude and Orbit Control (AOCS), and Pointing Laboratory, based at ESA's ESTEC technical centre in the Netherlands, this test bench combines a two-axis precise rotating table with a single star simulator - simulating the light coming from infinity from a star of a given brightness and colour.

Produced in house by the lab team, the purpose of this facility is to characterise or calibrate a startracker in terms of distortion, chromatic aberration and other optical variables.

The GNC, AOCS and Pointing Lab works on manner of technologies related to a spacecraft's ability to derive its orientation and location in space. It is one of a suite of ESA technical labs addressing all aspects of spaceflight.

The labs are focused primarily on the needs of ESA and European space missions but are also available for institutions and companies of ESA Member States when possible.

Related Links
Guidance and Navigation Control (GNC) Attitude and Orbit Control (AOCS), and Pointing Laboratory,
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