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Anti-satellite missile


Anti-satellite weapons (ASAT) are space weapons designed to incapacitate or destroy satellites for strategic military purposes.

The development and design of anti-satellite weapons has followed a number of paths. The initial efforts by the USA and the USSR were using ground-launched missiles from the 1950s; many more exotic proposals came afterwards.

In the late 1950s the U.S. Air Force started a series of advanced strategic missile projects under the designation Weapon System WS-199A. One of the projects studied under the 199A umbrella was Martin's Bold Orion air-launched ballistic missile (ALBM) for the B-47 Stratojet, based on the rocket motor from the Sergeant missile. Twelve test launches were carried out between 26 May 1958 and 13 October 1959, but these were generally unsuccessful and further work as an ALBM ended. The system was then modified with the addition of an Altair upper stage to create an anti-satellite weapon with an 1100-mile (1700-km) range. Only one test flight of the anti-satellite mission was carried out, making a mock attack on the Explorer 6 at an altitude of 156 miles (251 km). To record its flight path, the Bold Orion transmitted telemetry to the ground, ejected flares to aid visual tracking, and was continuously tracked by radar. The missile successfully passed within 4 miles (6.4 km) of the satellite, which would be suitable for use with a nuclear weapon, but useless for conventional warheads.

A similar project carried out under 199A, Lockheed's High Virgo, was initially another ALBM for the B-58 Hustler, likewise based on the Sergeant. It too was adapted for the anti-satellite role, and made an attempted intercept on Explorer 5 on 22 September 1959. However, shortly after launch communications with the missile were lost and the camera packs could not be recovered to see if the test was successful. In any event, work on the WS-199 projects ended with the start of the GAM-87 Skybolt project. Simultaneous U.S. Navy projects were also abandoned although smaller projects did continue until the early 1970s.


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