SRATS

Re-entered 29 Jun 1980

SRATS (NORAD 7671, COSPAR 1975-014A) was a J satellite that re-entered Earth's atmosphere on 29 Jun 1980, launched on 24 Feb 1975 on the SRATS mission. It was operated by ISAS as part of the Mu Early programme. The spacecraft was built by ISAS on the SRATS bus, with a mass of 86 kg. Like most satellites in low orbits, it was gradually slowed by atmospheric drag until re-entry. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.

1975

launched

1980

re-entered

years on orbit

kg mass

Lifecycle

Launched24 Feb 1975 · on the SRATS mission

Operational14 Mar 1977 · entered service

Retired14 Mar 1977 · end of operational service

Re-entered29 Jun 1980 · atmospheric re-entry — object destroyed

Specifications

NORAD ID7671

COSPAR1975-014A

TypeSatellite

OperatorISAS

Country / StateJ

ManufacturerISAS

BusSRATS

Mass86 kg

ProgrammeMu Early

CategorySCI

OrbitLEO (LEO/I)

Altitude249 × 3,115 km

Inclination31.6°

Frequently asked questions

What happened to SRATS?

SRATS re-entered Earth's atmosphere on 29 Jun 1980, ending a mission that began with its launch in 1975. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did SRATS re-enter the atmosphere?

SRATS re-entered on 29 Jun 1980, according to Orbital Radar's historical catalogue records.

Who operated and built SRATS?

SRATS was operated by ISAS and built by ISAS (J).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.

Browse the live satellite directory → Re-entered satellites archive → Launch record: SRATS → What is space debris? →