Method and apparatus for computing position using instantaneous doppler measurements from satellites
First Claim
1. A method of locating position of a satellite signal receiver, comprising:
- measuring at least one fractional pseudorange between the satellite signal receiver and a respective at least one satellite;
measuring at least one instantaneous Doppler measurement for a respective at least one satellite signal relative to the satellite signal receiver;
transmitting the at least one pseudorange and the at least one instantaneous Doppler measurement to a server; and
computing a position of the satellite signal receiver at the server using the at least one pseudorange and the at least one instantaneous Doppler measurement, wherein computing comprises;
computing an initial position of the satellite signal receiver using the at least one instantaneous Doppler measurement;
computing an integer millisecond portion of the at least one fractional pseudorange using the initial position to form at least one full pseudorange;
forming pseudorange residuals using the at least one full pseudorange and the initial position; and
computing an update of the initial position.
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Accused Products
Abstract
Method and apparatus for computing position using instantaneous Doppler measurements from satellites is described. In one example, instantaneous Doppler measurements are measured for a plurality of satellite signals relative to a satellite signal receiver. The instantaneous Doppler measurements are transmitted to a server. Position of the satellite signal receiver is computed at the server using the instantaneous Doppler measurements. In another example, at least one fractional pseudorange is measured between the satellite signal receiver and a respective at least one satellite. At least one instantaneous Doppler measurement is measured for a respective at least one satellite signal relative to the satellite signal receiver. The at least one pseudorange and the at least one instantaneous Doppler measurement are sent to a server. Position of the satellite signal receiver is computed at the server using the at least one pseudorange and the at least one instantaneous Doppler measurement.
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Citations
20 Claims
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1. A method of locating position of a satellite signal receiver, comprising:
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measuring at least one fractional pseudorange between the satellite signal receiver and a respective at least one satellite; measuring at least one instantaneous Doppler measurement for a respective at least one satellite signal relative to the satellite signal receiver; transmitting the at least one pseudorange and the at least one instantaneous Doppler measurement to a server; and computing a position of the satellite signal receiver at the server using the at least one pseudorange and the at least one instantaneous Doppler measurement, wherein computing comprises; computing an initial position of the satellite signal receiver using the at least one instantaneous Doppler measurement; computing an integer millisecond portion of the at least one fractional pseudorange using the initial position to form at least one full pseudorange;
forming pseudorange residuals using the at least one full pseudorange and the initial position; andcomputing an update of the initial position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for locating position, comprising:
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a remote receiver having a satellite signal receiver, a microcontroller, and a wireless transceiver; and
a server in wireless communication with the remote receiver;where the satellite signal receiver receives satellite signals;
where the microcontroller determines at least one fractional pseudorange between the satellite signal receiver and at least one satellite and determines at least one instantaneous Doppler measurement for at least one satellite signal of the satellite signals relative to the satellite signal receiver; andwhere the wireless transceiver transmits the at least one fraction pseudorange and the at least one instantaneous Doppler measurement to the server for computing a position of the remote receiver; and wherein the instantaneous Doppler measurements are measured over a time interval that is less than one second; and wherein measuring at least one instantaneous Doppler measurement for a respective at least one satellite signal relative to the satellite signal receiver further comprises measuring at least one instantaneous for a single satellite signal relative to the satellite signal receiver by measuring the Doppler measurement for only the single satellite signal relative to the satellite signal receiver. - View Dependent Claims (12)
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13. A method of locating position of a satellite signal receiver, comprising:
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measuring at least one fractional pseudorange between the satellite signal receiver and a respective at least one satellite; measuring at least one instantaneous Doppler measurement for a respective at least one satellite signal relative to the satellite signal receiver; transmitting the at least one pseudorange and the at least one instantaneous Doppler measurement to a server; and computing a position of the satellite signal receiver at the server using the at least one pseudorange and the at least one instantaneous Doppler measurement; and wherein the instantaneous Doppler measurements are measured over a time interval that is less than one second; and wherein measuring at least one instantaneous Doppler measurement for a respective at least one satellite signal relative to the satellite signal receiver comprises measuring at least one instantaneous for a single satellite signal relative to the satellite signal receiver by measuring the Doppler measurement for only the single satellite signal relative to the satellite signal receiver. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification