Tech Focus

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November 2004

Doppler navigation system for backup and verification of GPS

The proposed autonomous navigation concept incorporates a radar altimeter, multiple forward-looking (and possibly aft-looking) pulse Doppler radar beams, and a site-specific airborne radar clutter model to aid in aircraft navigation under conditions when GPS service is interrupted. Additionally, this system may be used as a means of periodically verifying the navigation outputs of a GPS system.
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