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SECS (Chalk Tercel 2 ?, GLOMR 2)


SECS (Special Experimental Communication System), also known as TERCEL and GLOMR 2, was a digital store and forward communications spacecraft built by the US Navy for a classified mission.

The satellite was buit by Defense Systems Inc. (DSI) to a design similar to the GLOMR satellite. It featured a 62-sided polyhedron structure of 0.6 m diameter with body mounted solar cells and more data storage, greater redundancy and more space qualified hardware content compared to the GLOMR predecessor. SECS, together with Pegsat, was the first spacecraft launched on the air-launched Pegasus launch vehicle. The spacecraft operated for 3.5 years.

Nation: USA
Type / Application: Experimental communication
Operator: US Navy
Contractors: DSI
Equipment: 2 UHF transponders digital store and forward communications system
Configuration: GLOMR Bus (62-sided polyhedron, unstabilized, body mounted solar cells)
Propulsion: None
Power: Solar cells, batteries
Lifetime: 3.5 years
Mass: 68 kg
Orbit: 489 km × 668 km, 94.1
Satellite COSPAR Date LS Launch Vehicle Remarks
SECS (Chalk Tercel 2 ?, GLOMR 2, USA 55) 1990-028B 05.04.1990 Ed, B-52, RW04/22 Pegasus with Pegsat


  • NSSDC Master Catalog: SECS
Further GLOMR missions:

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