ATS-3 - History

History

Launched in November 1967, the ATS-3 was in service for 34 years before finally being decommissioned in 2001. Among its widest-known achievements are the first full-disk, colour Earth images transmitted from a satellite. Its imaging capability has served during disaster situations, from the Mexico earthquake to the Mount St. Helens eruption.

ATS-3 experiments included VHF and C-band communications, a colour spin-scan camera (principally developed by Verner E. Suomi), an image dissector camera, a mechanically despun antenna, resistojet thrusters, hydrazine propulsion, optical surface experiments, and the measurement of the electron content of the ionosphere and magnetosphere.

Because of failures in the hydrogen peroxide systems on ATS-1, ATS-3 was equipped with a hydrazine propulsion system. Its success led to its incorporation on ATS-4 and ATS-5 as the sole propulsion system.

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