File:Casa Grande-Corona Satellite Calibration Target-Montgomery-Cornman-1.JPG
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English: The Corona Satellite Calibration Targets were built in the 1960s in the desolate Arizona desert. They are large concrete crosses in the ground with a resemblance of a large Maltese Cross. The targets are only visible if one walked up to them or passed over them from a great height, like space. The crosses were roughly arranged into a 16 x 16 grid so that the satellites could orient themselves and focus correctly before actually spying on America's Cold War interests. When the Corona project ended in 1972, a number of the crosses were demolished. Only a few still remain scattered throughout the desert. This one is located in Casa Grande on the southeast corner of South Montgomery and West Cornman Roads. |
| Date | |
| Source | Own work |
| Author | Marine 69-71 |
| Object location |  | View this and other nearby images on: OpenStreetMap |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:06, 17 April 2016 | | 3,264 × 2,448 (1.97 MB) | Marine 69-71 (talk | contribs) | User created page with UploadWizard |
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