Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

GREB (1964-001E)

retired

Signals IntelligenceLEOCOSPAR 1964-001ELaunched 1/11/1964

Mission & Launch

Launch Mission: POPPY 3/NRL Comp 4
Launch Vehicle: Thor SLV-2A Agena D
Launch Date: 1/11/1964
Last Contact: 1/1/1965

Orbit & Mass

Orbit Class: LEO
Altitude: 921.5 km
Inclination: 69.88 deg
Dry Mass: 29 kg
Total Mass: 29 kg

Payload Classification

Mission Type: Signals Intelligence
Payload Category: SIG
Payload Class: D

Organizations

Operator: U.S. National Reconnaissance Office (NRO)
Manufacturer: U.S. Naval Research Lab

Registry

COSPAR ID: 1964-001E
UN Registration: A/AC.105/INF.062