All-weather precision guidance and navigation system
First Claim
1. A system for navigation, comprising:
- a plurality of reference sensors, each receiving data from a global positioning system and generating therefrom reference sensor data;
a central processing node which receives the reference sensor data from each of the reference sensors, computes a set of correction parameters based upon detected global positioning system errors indicated by the reference sensor data and based upon single differenced velocity corrections, and transmits said correction parameters;
a fire control platform that determines the position of a destination, receives the correction parameters transmitted by the central processing node, and corrects the determined position in accordance with the correction parameters; and
a weapon system which receives the corrected target position of the destination from the fire control platform and position data from the global positioning system, and steers itself to the target in accordance with the received position information.
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Accused Products
Abstract
A location of a target is generated by, at each of a plurality of reference sensors, receiving signals from a plurality of positioning system satellites. A set of error measurements are generated by generating, for each of the reference sensors, one or more error measurements based on a reference location of the reference sensor and information derived from the signals received at the reference sensors from the plurality of position system satellites. Single differenced velocity corrections are also generated. At a central processing node, a meta-correction surface is generated from the set of error measurements. The meta-correction surface is then transmitted to a non-reference sensor. At the non-reference sensor, signals are received from a plurality of the positioning system satellites. The meta-correction surface and the signals received from the plurality of position system satellites are used to generate the location of the target.
53 Citations
36 Claims
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1. A system for navigation, comprising:
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a plurality of reference sensors, each receiving data from a global positioning system and generating therefrom reference sensor data;
a central processing node which receives the reference sensor data from each of the reference sensors, computes a set of correction parameters based upon detected global positioning system errors indicated by the reference sensor data and based upon single differenced velocity corrections, and transmits said correction parameters;
a fire control platform that determines the position of a destination, receives the correction parameters transmitted by the central processing node, and corrects the determined position in accordance with the correction parameters; and
a weapon system which receives the corrected target position of the destination from the fire control platform and position data from the global positioning system, and steers itself to the target in accordance with the received position information.
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2. A method for navigation within a theater of operations, comprising the steps of:
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receiving positioning system satellite signals at a plurality of spaced apart known locations, wherein the known locations approximately define the theater of operations;
determining a measure of error in the positioning system satellite signals for each known location;
generating single differenced velocity corrections; and
utilizing the measures of error in the positioning system satellite signals and the single differenced velocity corrections to obtain correction data for locating unknown locations within the theater of operations. - View Dependent Claims (3, 4, 5)
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6. A system for navigation within a theater of operations, comprising:
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a plurality of spaced apart positioning system sensors at calibrated locations that approximately define the theater of operations;
means for determining a measure of error in positioning system satellite signals received by each positioning system sensor;
means for determining single differenced velocity corrections; and
means for using the measures of error in the positioning system satellite signals and the single differenced velocity corrections to obtain correction data for locating unknown locations within the theater of operations. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method of generating a location of a target, the method comprising:
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at each of a plurality of reference sensors, receiving signals from a plurality of positioning system satellites;
generating a set of error measurements by generating, for each of the reference sensors, one or more error measurements based on a reference location of the reference sensor and information derived from the signals received at the reference sensors from the plurality of position system satellites;
generating single differenced velocity corrections;
at a central processing node, generating a meta-correction surface from the set of error measurements and the single differenced velocity corrections;
transmitting the meta-correction surface to a non-reference sensor; and
using the meta-correction surface and signals received from a plurality of position system satellites to generate the location of the target. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for generating a location of a target, the system comprising:
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a plurality of reference sensors, wherein each reference sensor receives signals from a plurality of positioning system satellites;
one or more processors for generating a set of error measurements by generating, for each of the reference sensors, one or more error measurements based on a reference location of the reference sensor and information derived from the signals received at the reference sensors from the plurality of position system satellites, and by generating single differenced velocity corrections;
a central processing node that generates a meta-correction surface from the set of error measurements and the single differenced velocity corrections;
a transmitter for transmitting the meta-correction surface to a non-reference sensor;
at the non-reference sensor;
a receiver for receiving signals from a plurality of the positioning system satellites; and
a processor that uses the meta-correction surface and the signals received from the plurality of the positioning system satellites to generate the location of the target. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A method of generating a location of a target, the method comprising:
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at each of a plurality of reference sensors whose positions are known, receiving signals from a plurality of positioning system satellites;
at a central processing node, generating correction data based on the signals received from the plurality of position system satellites;
communicating the correction data to a non-reference sensor;
at the non-reference sensor, receiving signals from the plurality of positioning system satellites; and
at the non-reference sensor, using the correction data and the received signals from the plurality of positioning system satellites to determine the location of the target, wherein the target is not co-located with the non-reference sensor. - View Dependent Claims (30, 31, 32, 34, 35)
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33. A system for generating a location of a target, the system comprising:
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a plurality of reference sensors whose positions are known;
at each of the plurality of reference sensors, logic that receives signals from a plurality of positioning system satellites;
a central processing node;
at the central processing node, logic that generates correction data based on the signals received from the plurality of position system satellites;
a non-reference sensor;
logic that communicates the correction data from the central processing node to the non-reference sensor;
at the non-reference sensor, logic that receives signals from the plurality of positioning system satellites; and
at the non-reference sensor, logic that uses the correction data and the received signals from the plurality of positioning system satellites to determine the location of the target, wherein the target is not co-located with the non-reference sensor. - View Dependent Claims (36)
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Specification