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USA 75

USA 75 is classified as:

NORAD ID: 21805
Int'l Code: 1991-080B
Launch date: November 24, 1991
Source: United States (US)

Infrared sensors to detect heat from missile and booster plumes against earth's background; detection capability of smaller missiles; improved warning of attack by short-range missiles against U.S. and allied forces.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):

Source of the keplerian elements: AFSPC

N2YO: 215