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US 6,587,789 B2Granted
Method and apparatus for locating mobile receivers using a wide area reference network for propagating ephemeris
AssigneeGlobal Locate, Inc.
InventorFrank van Diggelen
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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.
Claims13
A method for locating position comprising:
- receiving satellite telemetry data from a plurality of 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.
3 more elements
Dependencies are inferred from the claim text.