System and method for geo-locating a receiver with reduced power consumption
First Claim
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1. A system for determining a position estimate for a remote asset comprising:
- at least one receiver located on the remote asset for collecting GPS signal information from multiple space vehicles and generating a set of signal delays for each of the multiple space vehicles;
at least one transmitter located on the remote asset for transmitting the set of signal delays;
a ground station including a geo-location processor and a navigation database for receiving the set of signal delays and computing a position estimate for the remote asset.
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Abstract
A system and process for the geo-location of an asset given no a priori knowledge regarding time and location of the asset with minimized power consumption is disclosed. In the preferred embodiment, the system is accurate to about 30 meters CEP (50% circular error probable) using just a short segment, e.g., 100-200 ms, of digitized GPS L1 signal data.
30 Citations
19 Claims
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1. A system for determining a position estimate for a remote asset comprising:
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at least one receiver located on the remote asset for collecting GPS signal information from multiple space vehicles and generating a set of signal delays for each of the multiple space vehicles; at least one transmitter located on the remote asset for transmitting the set of signal delays; a ground station including a geo-location processor and a navigation database for receiving the set of signal delays and computing a position estimate for the remote asset. - View Dependent Claims (2, 3, 4)
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5. A method for determining a position estimate for a remote asset comprising:
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collecting GPS signal information from multiple space vehicles at the remote asset, the GPS signal information being transmitted from each of the multiple space vehicles at a known signal frequency; extracting a set of signal delays for each of the multiple space vehicles; transmitting the set of signal delays and identification information for each of the multiple space vehicles to a ground station; processing the set of signal delays for each of the multiple space vehicles; retrieving information from a navigation database; and computing a position estimate for the remote asset using the set of signal delays, the information from the navigation database, and an estimated time of data collection at the remote asset. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification