OptiSat is a Greek technology demonstration satellite designed to test laser-based communication technologies and automatic on-orbit data processing. The 6U CubeSat-type small satellite was developed by the Greek company Planetek Hellas and includes a SCOT20 laser terminal built by the German company TESAT. The satellite is also testing machine learning-based image processing technology intended for aiding the optical communication link by automatically selecting cloud-free ground stations. The development of the satellite was supported by the EU's and ESA's Greek CubeSat In-Orbit Validation programme. It was launched on the Transporter-16 flight of the Falcon 9 rocket on 30 March 2026.
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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Planetek Hellas, Hellenic Space Center, 
European Space Agency
