Hot-start navigation information distribution system

Details Hot-start navigation information distribution system Hot-start navigation information distribution system

2006-07-25

2006-07-25

Gregory, Bernarr E. (Department: 3662)

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

C244S003100, C342S357490, C342S357490, C701S200000, C701S207000, C701S213000, C701S215000, C380S277000, C380S278000, C380S044000

Reexamination Certificate

active

07080804

ABSTRACT:
A weapons system is disclosed that provides hot-start navigational information to the Global-Positioning-System receivers on missiles prior to flight. The system comprises a Global-Positioning-System receiver that uses a classified red cryptographic key to decode the P(Y) signal from one or more of the Global-Positioning-System constellation of satellites. Once the P(Y) signal is decoded, one or more characteristics of the P(Y) signal is derived. These characteristics of the signal—and some other information including a black cryptographic key that comprises the red cryptographic key—are then provided to the Global-Positioning-System receivers on missiles prior to flight. By giving the missiles this information, the missiles are able to acquire the P(Y) signals, which enables them to determine their position more quickly than they otherwise could.

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patent: 5657947 (1997-08-01), Mayersak
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patent: 6573486 (2003-06-01), Ratkovic et al.
patent: 6779752 (2004-08-01), Ratkovic
patent: 6883747 (2005-04-01), Ratkovic et al.

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