Orbital Test Satellite
European experimental telecommunication program decided by the CEPT
(Conférence Européenne des Postes et
Télécommunications) with the EBU.
History of OTS/ECS satellites
Name Launch date Operator Dry mass Apogee motor type
1 OTS 1 1977 Sep 13 ESA 390 kg Aerojet SVM-7 (Launch failed)
2 OTS 2 1978 May 11 ESA 390 Aerojet SVM-7