frame-it Posted July 21, 2022 Share #1 Posted July 21, 2022 Advertisement (gone after registration) interesting article https://www.thedrive.com/the-war-zone/beale-air-force-base-finally-says-goodbye-to-film-for-its-u-2-spy-planes https://www.af.mil/News/Article-Display/Article/138474/sensor-shop-ensures-successful-u-2-missions/ “Each roll of OBC film is 5 inches wide and 10,500 feet long with each frame of imagery measuring more than 6 feet long... With an entire roll of film, the camera can take about 1,600 frames in one mission. Each frame covers roughly 110 square nautical miles in a panoramic horizon-to-horizon format. Basically, a roll of film can shoot an area the size of Colorado... When the OBC was on the SR-71 it took a frame about every 1.7 seconds, but for the U-2 it was slowed down to one frame every 6.8 seconds... This had to be done because the difference in the cruising speeds of the aircraft could cause the imagery to blur if the timing and speed of the camera was wrong." "The OBC could return into service as needed and will remain available when called upon. As of now, no perfect digital replacement has been developed. Digital imaging technology doesn't quite match the resolving power of the OBC." 2 1 Quote Link to post Share on other sites More sharing options...
Advertisement Posted July 21, 2022 Posted July 21, 2022 Hi frame-it, Take a look here U2 Moving to Digital. I'm sure you'll find what you were looking for!
Chuck Albertson Posted July 21, 2022 Share #2 Posted July 21, 2022 They ran out of mailers! NASA runs a research version (ER-2) of the U2, it could likely use a film camera, but they seem to do everything digitally. The declassification of past satellite photos is giving climate scientists and the like a lot of historical data: https://www.nytimes.com/2021/01/05/science/corona-satellites-environment.html Quote Link to post Share on other sites More sharing options...
AndreasG Posted July 21, 2022 Share #3 Posted July 21, 2022 Very interesting links, thank you! What do we know about lens system and shutter of the OBC? Quote Link to post Share on other sites More sharing options...
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