Locating satellites
First Claim
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1. A method of locating the position of a satellite in a satellite positioning system, the method comprising:
- receiving, at a terminal, satellite positioning data for a plurality of specified time periods over a communications channel;
storing, at the terminal, the satellite positioning data for the plurality of specified time periods;
calculating an error corresponding to the satellite positioning for at least one specified time period; and
responsive to an event at a later time, calculating, at the terminal, the satellite position at a later time based on the satellite positioning data for one of the plurality of specified time periods and the calculated error.
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Abstract
A system and method of locating the position of a satellite or a user using a satellite positioning system. The system and method includes receiving, at a terminal, satellite positioning data for at least one specified time period over a communications channel. In addition, the system includes storing, at the terminal, the satellite positioning data for the at least one specified time period. Responsive to an event at a later time, the system generally calculates, at the terminal, the satellite position at the later time based only on the satellite positioning data for the at least one specified time period.
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Citations
20 Claims
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1. A method of locating the position of a satellite in a satellite positioning system, the method comprising:
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receiving, at a terminal, satellite positioning data for a plurality of specified time periods over a communications channel; storing, at the terminal, the satellite positioning data for the plurality of specified time periods; calculating an error corresponding to the satellite positioning for at least one specified time period; and responsive to an event at a later time, calculating, at the terminal, the satellite position at a later time based on the satellite positioning data for one of the plurality of specified time periods and the calculated error. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A terminal configured to locate the position of a satellite in a satellite positioning system, the terminal comprising:
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a receiver configured to receive satellite positioning data for at least one specified time period over a communications channel; a memory configured to store the satellite positioning data for a plurality of specified time periods; and a processing circuitry configured to calculate an error corresponding to the satellite positioning for at least one specified time period and, responsive to an event at a later time, calculate the satellite position at a further time based on the satellite positioning data for one of the plurality of specified time periods and the calculated error. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for determining the local position of a user of a terminal at the request of the user, the method comprising:
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calculating, at the terminal, a position of a satellite in a satellite positioning system at a time of the request based only on an error correction factor and satellite positioning data previously received at the terminal for at least one specified time period over a communications channel and stored at the terminal; and using the calculated position of the satellite to calculate the terminal location. - View Dependent Claims (17, 18, 19, 20)
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Specification