Objective: Earth. Type: Magnetosphere. Overview: Upper atmosphere, auroral studies. Investigation of physical phenomena in the Earth's upper atmosphere at high latitudes and study of the nature of auroras. . Major Events: .
27 December 1971 Oreol Spacecraft: DS-U2-GKA. Mass: 630 kg.
Launch Site: Plesetsk . Launch Vehicle: Cosmos 11K65M . Summary: Upper atmosphere, auroral studies. Investigation
of physical phenomena in the Earth's upper atmosphere at high latitudes and study of the nature of auroras.
26 December 1973 Oreol 2 Spacecraft: DS-U2-GKA. Mass: 550 kg.
Launch Site: Plesetsk . Launch Vehicle: Cosmos 11K65M . Summary: Continued investigations in the earth's upper
atmosphere at high latitudes and study of the nature of polar aurorae begun on board the Oreol satellite in 1971.