Cold War satellite calibration marker. One of 256 now-abandoned satellite calibration markers placed in the Arizona desert by the US Air Force and the CIA (Central Intelligence Agency) during the Cold War (1947-1991). The concrete markers seen here helped calibrate spy satellites that were used to take pictures over Russia and China from 1959 to 1972. Photographed in Casa Grande, Arizona, USA. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 6529 px × 4352 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |