Method and apparatus for processing of satellite signals without time of day information
First Claim
1. A method of locating position of a satellite from a satellite signal receiver, the method comprising:
- receiving a first plurality of data from the satellite;
computing an initial satellite position estimate, estimating a position of the satellite at a particular time according to a mathematical model and the first plurality of data;
receiving a second plurality of data from the satellite; and
computing an updated satellite position estimate, estimating the position of the satellite at the same particular time as estimated by the initial satellite position estimate, according to the mathematical model and the second plurality of data.
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Abstract
Method and apparatus for locating position of a satellite signal receiver is described. In one example, pseudoranges are obtained that estimate the range of a satellite signal receiver to a plurality of satellites. An absolute time and a position are computed using the pseudoranges at a first time. The absolute time is then used to compute another position at a subsequent time. In another example, a plurality of states associated with a satellite signal receiver are estimated, where the plurality of states includes a time tag error state. A dynamic model is then formed relating the plurality of states, the dynamic model operative to compute position of the satellite signal receiver.
81 Citations
18 Claims
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1. A method of locating position of a satellite from a satellite signal receiver, the method comprising:
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receiving a first plurality of data from the satellite; computing an initial satellite position estimate, estimating a position of the satellite at a particular time according to a mathematical model and the first plurality of data; receiving a second plurality of data from the satellite; and computing an updated satellite position estimate, estimating the position of the satellite at the same particular time as estimated by the initial satellite position estimate, according to the mathematical model and the second plurality of data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17)
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9. A system for computing position of a satellite, the system comprising:
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a receiver for receiving a first plurality of data from the satellite at a first time and receiving a second plurality of data from the satellite at a second time; and a processor for using a mathematical model, wherein the processor computes an initial satellite position estimate, estimating a position of the satellite at a particular time according to the mathematical model and the first plurality of data, and wherein the processor computes an updated satellite position estimate, estimating the position of the satellite at the same particular time as estimated by the initial satellite position estimate, according to the mathematical model and the second plurality of data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 18)
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Specification