Inventors:
Paul Y. Kim - Orlando FL, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
G01S 1/00
Abstract:
An exemplary method for ultra-tight or deep-integrated tracking signals, transmitted from satellites and containing digital codes, includes a receiver receiving first and second signals transmitted by a satellite, and tracking the first and second signals with one integrated filter. The integrated filter tracks range error, range error rate, range error acceleration, a carrier integer ambiguity of the first signal, a carrier integer ambiguity of the second signal, an ionospheric delay error, and optionally an ionospheric delay error rate.