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- Q4782628 subject Q6097697.
- Q4782628 subject Q7142555.
- Q4782628 subject Q8302531.
- Q4782628 subject Q8664849.
- Q4782628 subject Q8695113.
- Q4782628 abstract "Aquacade, previously designated Rhyolite, was a class of SIGINT spy satellites operated by the National Reconnaissance Office for the United States Central Intelligence Agency. The National Security Agency (NSA) was also reportedly involved. The program, also known by SIGAD AFP-720 and SIGAD AFP-472, respectively, is still classified. During the same period, the Canyon SIGNIT satellites were in use with an apparently somewhat different set of capabilities.The name of the program, originally "Rhyolite", was changed to "Aquacade" in 1975 following the disclosure of the codeword "Rhyolite" in the trial of Christopher Boyce and Andrew Lee.The Rhyolite/Aquacade satellites, made by TRW, are rumored to have an umbrella-like reflecting dish 20 meters in diameter. They were succeeded by the Magnum/Orion and Mentor series of satellites.A major purpose of the Rhyolite satellites was reportedly the interception of Soviet and Chinese microwave relay signals traffic. During the 1960s-70s, much of the long distance telephone and data traffic in both the US and Eastern Europe was carried by terrestrial microwave relay links, each consisting of a dish antenna on a microwave tower that transmitted a narrow beam of microwaves to a receiving dish in a nearby city. A good deal of the microwave beam would miss the receiving dish and, because of the curvature of the Earth, radiate out into space. By placing a satellite in a geosynchronous orbit at a position in the sky where it could intercept the beam, the US government was able to listen in on Soviet telephone calls and telex cables during the Cold War.".
- Q4782628 thumbnail Rhyolite_sat.svg?width=300.
- Q4782628 wikiPageExternalLink overview.htm.
- Q4782628 wikiPageExternalLink spacecraftDisplay.do?id=1970-046A.
- Q4782628 wikiPageExternalLink spacecraftDisplay.do?id=1973-013A.
- Q4782628 wikiPageExternalLink spacecraftDisplay.do?id=1977-114A.
- Q4782628 wikiPageExternalLink spacecraftDisplay.do?id=1978-038A.
- Q4782628 wikiPageWikiLink Q11223.
- Q4782628 wikiPageWikiLink Q121194.
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- Q4782628 wikiPageWikiLink Q466421.
- Q4782628 wikiPageWikiLink Q472251.
- Q4782628 wikiPageWikiLink Q4756762.
- Q4782628 wikiPageWikiLink Q4928259.
- Q4782628 wikiPageWikiLink Q5034176.
- Q4782628 wikiPageWikiLink Q509549.
- Q4782628 wikiPageWikiLink Q54228.
- Q4782628 wikiPageWikiLink Q6097697.
- Q4782628 wikiPageWikiLink Q7142555.
- Q4782628 wikiPageWikiLink Q7204.
- Q4782628 wikiPageWikiLink Q747066.
- Q4782628 wikiPageWikiLink Q762201.
- Q4782628 wikiPageWikiLink Q8302531.
- Q4782628 wikiPageWikiLink Q836610.
- Q4782628 wikiPageWikiLink Q8664849.
- Q4782628 wikiPageWikiLink Q8683.
- Q4782628 wikiPageWikiLink Q8695113.
- Q4782628 wikiPageWikiLink Q913832.
- Q4782628 wikiPageWikiLink Q926485.
- Q4782628 wikiPageWikiLink Q929797.
- Q4782628 wikiPageWikiLink Q967620.
- Q4782628 comment "Aquacade, previously designated Rhyolite, was a class of SIGINT spy satellites operated by the National Reconnaissance Office for the United States Central Intelligence Agency. The National Security Agency (NSA) was also reportedly involved. The program, also known by SIGAD AFP-720 and SIGAD AFP-472, respectively, is still classified.".
- Q4782628 label "Aquacade (satellite)".
- Q4782628 depiction Rhyolite_sat.svg.