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Here are details about a :
Space commemorative cover
or Space Cover.

the flag of USA
Cosmodrom : USA

Date of Cancellation: Dec. 20, 1972
Kind of Event : Launch
Launch pad : USA KSC (FL)
habité?/manned?: robot
Mission type : Military

ou?/where?: au sol - ground
autographe?: non - none

Description : Canyon was the first series of NRO’s near geostationary ELINT/SIGINT satellites launched under the designation AFP-827 or Program 7500. They were focussed on communications intelligence (COMINT).

The satellites were primary built to intercept soviet communications transmissions, especially line-of-sight microwave links, but were also able to tap into very high frequency (VHF) communications. Main contractor was Lockheed. Reportedly they consisted of a large (ca. 10 m diameter) antenna and were three axis stabilized. They were deployed into a 24 h orbit, which is not geostationary, so that triangulations of emmiter sources can be made from different points.
Vandenberg post stamp and Midas satellite.

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This will be featured in a future Space Revue.

Last modified: 03/30/2015 @ 16h25

ask if availablepurchase this item USA  611  7,50 

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enveloppe USA 611 - cover USA 611
USA 611

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Space Event :


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