Reduced-power GPS-based system for tracking multiple objects fro

Details Reduced-power GPS-based system for tracking multiple objects fro Reduced-power GPS-based system for tracking multiple objects fro

1997-08-25

1998-05-12

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

701213, 701215, 701300, 342357, 342457, H04B 7185, G01S 502

Patent

active

057522189

ABSTRACT:
Location of an object to be tracked is determined by measuring, at a receiver situated at the object, the propagation time differences between the signals from a plurality of GPS satellites, each of which is received by the receiver situated at the object. The measured propagation time difference values are transmitted to a central station where the location of the object to be tracked is calculated based upon the propagation time differences of the signals transmitted from the satellites and data derived from a receiver apart from the object but also receiving signals from the satellites.

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