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Efir 1, 2 (36KS)

Efir [GDK]

The Efir missions were scientific missions based on the Zenit / Vostok type spacecraft. Efir was to measure the energy spectrum and charge composition of primary cosmic rays with energy above 2 TeV.

The experiment was carried out with the detectors Sokol and Sokol-2 aboard the artificial earth satellites Kosmos-1543 and Kosmos-1713.

Nation: USSR
Type / Application: Cosmic radiation
Contractors: TsSKB
Configuration: Zenit Bus
Propulsion: 11D82M
Power: Batteries
Lifetime: 26 days
Mass: 6300 kg
Orbit: 214 km × 401 km, 62.8 (#1); 215 km × 397 km, 62.8 (#2)
Satellite COSPAR Date LS Launch Vehicle Remarks
Kosmos 1543 (Efir #1) 1984-026A 10.03.1984 Pl LC-41/1 Soyuz-U
Kosmos 1713 (Efir #2) 1985-120A 27.12.1985 Pl LC-41/1 Soyuz-U