The TE-M-364-4 is a 15,000-pound thrust, solid-propellant motor developed for use as an upper stage in a variety of USAF space program applications. It is an enlarged version of the TE-M-364, one of a series of solid propellant motors that powered the workhorse USAF Burner I and Burner IIA upper stages to orbit scientific, weather, navigation and communications satellites.
The TE-M-364-4 powered the upper stages of the USAF Atlas boosters used to launch the Global Positioning System satellites. It also was used as the second stage motor on USAF Thor vehicles that launched satellites of the Block 5D Defense Meteorological Satellite Program as well as the third stage motor on the Thor Delta launch vehicles.
