Enhancement of GNSS position determination in poor signal...

Details Enhancement of GNSS position determination in poor signal... Enhancement of GNSS position determination in poor signal...

2007-03-30

2010-02-02

Phan, Dao L (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490, C342S357490

Reexamination Certificate

active

07656349

ABSTRACT:
A system, for enhancing location estimates by movable rovers that use receivers for processing ranging signals from orbiting satellites, including a fixed base station that serves as a ranging signal source for the rovers' receivers. The base station may also determine and transmit the azimuthal angles of the respective rovers. The rovers use this information, along with a calculated or transmitted ranges to the base station to calculate the ranging system times at the locations of the rovers. Further, the rovers may use the information along with signals from satellites in view to determine position.

REFERENCES:
patent: 3742498 (1973-06-01), Dunn
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patent: 6212475 (2001-04-01), France et al.
patent: 6556942 (2003-04-01), Smith
patent: 6560535 (2003-05-01), Levy et al.
patent: 2003/0058163 (2003-03-01), Zimmerman et al.
patent: 2003/0085839 (2003-05-01), Zhodzishky et al.
patent: 2004/0130485 (2004-07-01), Rapoport et al.

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