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.
|Type / Application:||Cosmic radiation|
|Orbit:||214 km × 401 km, 62.8° (#1); 215 km × 397 km, 62.8° (#2)|
|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|