Method and system for providing a user with precision location information
First Claim
1. For use with a plurality of Global Positioning System (GPS) Space Vehicles (SVs) for transmitting a plurality of navigation data messages, a plurality of monitor stations at a plurality of known fixed locations for monitoring the plurality of navigation data messages and transmitting a plurality of corresponding correction factors, and a central ground station for receiving the plurality of correction factors, a method for providing a user with correction information for use in accurately determining a location of the user, the method comprising the steps of:
- receiving at least one of the plurality of navigation data messages at an unknown location;
determining a general location of the user based on the at least one of the plurality of navigation data messages and generating a user data message including data corresponding to the general location of the user;
transmitting the user data message to the central ground station;
determining user location correction data based on the user data message and the plurality of correction factors transmitted by each of the plurality of monitor stations; and
transmitting the user location correction data to the user so as to provide the user with precision correction information.
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Accused Products
Abstract
A method and system for providing a user with correction information for use in accurately determining the location of the user. A plurality of monitor stations are disposed at a plurality of known fixed locations for monitoring a plurality of navigation data messages transmitted by Global Positioning Systems (GPS) Space Vehicles (SVs) and for determining a plurality of corresponding correction factors. A central ground station is operatively coupled to each of the plurality of monitor stations for receiving the plurality of correction factors from each of the plurality of monitor stations. A GPS transceiver receives at least one of the plurality of navigation data messages at an unknown location and determines a general location of the user. The general location of the user is then transmitted to the central ground station. The central ground station determines user location correction data based on the navigation data received by the user and the plurality of correction factors transmitted by each of the plurality of monitor stations. The central ground station then transmits the user location correction data to the user for use in determining the location of the user with sub-meter precision. An accounting record may be created for the user for receiving the precision correction information so that the user can be subsequently billed a fee for the services provided by the central ground station.
71 Citations
23 Claims
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1. For use with a plurality of Global Positioning System (GPS) Space Vehicles (SVs) for transmitting a plurality of navigation data messages, a plurality of monitor stations at a plurality of known fixed locations for monitoring the plurality of navigation data messages and transmitting a plurality of corresponding correction factors, and a central ground station for receiving the plurality of correction factors, a method for providing a user with correction information for use in accurately determining a location of the user, the method comprising the steps of:
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receiving at least one of the plurality of navigation data messages at an unknown location; determining a general location of the user based on the at least one of the plurality of navigation data messages and generating a user data message including data corresponding to the general location of the user; transmitting the user data message to the central ground station; determining user location correction data based on the user data message and the plurality of correction factors transmitted by each of the plurality of monitor stations; and transmitting the user location correction data to the user so as to provide the user with precision correction information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. For use with a plurality of Global Positioning System (GPS) Space Vehicles (SVs) each transmitting a navigation data message, a system for providing a user with correction information for use in determining a location of the user, comprising:
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a plurality of monitor stations disposed at a plurality of known fixed locations for monitoring the navigation data messages transmitted by each of the GPS SVs and for determining a plurality of corresponding correction factors; a central ground station operatively coupled to each of the plurality of monitor stations for receiving the plurality of correction factors from each of the plurality of monitor stations; a first transceiver for receiving at least one of the navigation data messages at an unknown location and determining a general location of the user and generating a corresponding user data message; a second transceiver for receiving the user data message from the first transceiver and for transmitting the user data message to the central ground station; and wherein the central ground station determines user location correction data based on the received user data message and the plurality of correction factors transmitted by each of the plurality of monitor stations and transmits the user location correction data to the second transceiver, and wherein the second transceiver transmits the user location correction data to the first transceiver for use in determining the location of the user. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification