SOLRAD 2 (from "solar radiation") was the public designation for a combination surveillance and solar X-rays and ultraviolet scientific satellite, the second in the SOLRAD program developed by the United States Navy's Naval Research Laboratory. The SOLRAD scientific package aboard the satellite provided cover for the GRAB (Galactic Radiation and Background) electronic surveillance package, the mission of which was to map the Soviet Union's air defense radar network.
SOLRAD 2 (from "solar radiation") was the public designation for a combination surveillance and solar X-rays and ultraviolet scientific satellite, the second in the SOLRAD program developed by the United States Navy's Naval Research Laboratory. The SOLRAD scientific package aboard the satellite provided cover for the GRAB (Galactic Radiation and Background) electronic surveillance package, the mission of which was to map the Soviet Union's air defense radar network.
Source: Wikipedia "SOLRAD 2" · CC BY-SA 4.0
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