Methods and systems to increase accuracy in the navigation...

Details Methods and systems to increase accuracy in the navigation... Methods and systems to increase accuracy in the navigation...

2011-06-14

2011-06-14

Phan, Dao L (Department: 3662)

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

Directive

Including a satellite

C342S357490, C342S357490, C342S357490, C342S357490, C342S357240, C342S357260, C342S357310, C342S357410, C342S357460, C701S207000, C701S213000, C701S215000

Reexamination Certificate

active

07961141

ABSTRACT:
In a method of mitigating errors in satellite navigation measurements at a satellite navigation receiver, respective single-frequency signals are received from respective satellites in a plurality of satellites in a satellite navigation system. Pseudorange and carrier-phase measurements corresponding to respective received single-frequency signals are calculated. These calculations include filtering the pseudorange and carrier-phase measurements in a Kalman filter having a state vector comprising a plurality of states, including a position state, a receiver clock state, and a plurality of bias states. Each bias state corresponds to a respective satellite in the plurality of satellites. The filtering includes updating the state vector. An estimated position of the satellite navigation receiver is updated in accordance with an update to the state vector.

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