ESA's Test Bed Telescopes (TBT) are two twin telescopes built by ESA to test different observational activities in the optical detection of NEO’s and satellites or space debris. The two telescopes...

The Schmidt telescope of the Centro Astronómico Hispano en Andalucía (CAHA Schmidt) was first installed in 1955 at the Hamburg Observatory in Germany, and subsequently moved to the Calar Alto...

ESA's Optical Ground Station (OGS) is a facility built by ESA to support tests of optical communication between Earth and orbiting satellites. The instrument is routinely used by ESA's Space Safety...

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