🛰️ SATELLITE · HISTORICAL RECORD
DSP F1
Retired 1974DSP F1 (NORAD 4630, COSPAR 1970-093A) is a retired US satellite, withdrawn from service around 1 Mar 1974, launched on 6 Nov 1970 on the DSP 1 mission. It is catalogued as DSP 1. It was operated by SAMSO as part of the DSP I programme. The spacecraft was built by TRW on the DSP bus, with a mass of 894 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1970
launched
1974
retired
56
years on orbit
894
kg mass
Lifecycle
Launched6 Nov 1970 · on the DSP 1 mission
Operational1 Mar 1974 · entered service
Retired1 Mar 1974 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID4630
COSPAR1970-093A
TypeSatellite
OperatorSAMSO
Country / StateUS
ManufacturerTRW
BusDSP
Mass894 kg (860 kg dry)
ProgrammeDSP I
CategoryEW
OrbitMEO (MEO)
Altitude26,045 × 35,930 km
Inclination7.6°
Frequently asked questions
What happened to DSP F1?
DSP F1 was retired from service around 1 Mar 1974 after launching in 1970. It is no longer operational but remains catalogued.
Who operated and built DSP F1?
DSP F1 was operated by SAMSO and built by TRW (US).
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-10-09.