Method and apparatus for locating mobile receivers using a wide area reference network for propagating ephemeris
First Claim
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1. A method for locating position comprising:
- receiving satellite telemetry data from all of the satellites in a global positioning system constellation of satellites;
communicating the received satellite telemetry data to a central processing site;
propagating selected satellite telemetry data to a mobile receiver; and
acquiring at least one satellite signal at said mobile receiver using said selected satellite data.
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Abstract
A method and apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers that send telemetry data from all satellites to the central site. The mobile GPS receiver uses the delivered telemetry data to aid its acquisition of the GPS satellite signal. The availability of the satellite telemetry data enhances the mobile receiver'"'"'s signal reception sensitivity.
20 Citations
38 Claims
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1. A method for locating position comprising:
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receiving satellite telemetry data from all of the satellites in a global positioning system constellation of satellites;
communicating the received satellite telemetry data to a central processing site;
propagating selected satellite telemetry data to a mobile receiver; and
acquiring at least one satellite signal at said mobile receiver using said selected satellite data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31)
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13. A method for locating position comprising:
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receiving satellite telemetry data from a plurality of the satellites in a global positioning system constellation of satellites;
communicating the received satellite telemetry data to a central processing site;
deriving a pseudo-range model comprising a pseudo-range, a pseudo-range rate and a pseudo-range acceleration;
propagating the pseudo-range model to a mobile receiver; and
acquiring at least one satellite signal at said mobile receiver using said pseudo-range model.
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26. Apparatus for locating a position of a mobile receiver comprising:
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a plurality of satellite signal receivers for receiving satellite signals from all satellites in a constellation of global positioning satellites;
a communications network, coupled to each of said satellite signal receivers in said plurality of satellite signal receivers;
a satellite data processor, coupled to said communications network; and
a mobile receiver, coupled to said satellite data processor.
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32. Apparatus for providing satellite data to a mobile receiver comprising:
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a plurality of tracking stations for receiving telemetry data from satellites; and
a communication network for propagating the telemetry data from all the satellites to a data processor. - View Dependent Claims (33, 34, 35, 37, 38)
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36. A method of receiving global positioning system (GPS) satellite signals comprising:
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receiving satellite ephemeris at a first location;
communicating the satellite ephemeris to a mobile GLS receiver at a second location; and
processing satellite signals received at the mobile GPS receiver using the ephemeris to reduce code and frequency uncertainty in the mobile GPS receiver to improve acquisition sensitivity of the mobile GPS receiver.
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Specification