GPS reference system providing a synthetic offset vector for dithering a rover station position
First Claim
1. A global navigation satellite system (GNSS) reference system for controlling accuracy of a geographical position of a rover station, comprising:
- a reference global navigation satellite system (GNSS) receiver for measuring a reference phase of a GNSS signal;
a vector generator for providing a synthetic offset vector; and
a reference data provider for issuing reference data including said reference phase and said synthetic offset vector, said reference data for use by a rover station for providing a rover position having an added positional error proportional to said synthetic offset vector.
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Accused Products
Abstract
A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established reference positions and measuring reference phases. The positioning system or the rover station selects a synthetic offset vector and uses the synthetic offset vector for inferring synthetic reference phases to a synthetic position. The rover station uses the synthetic reference phases with actual or virtual reference positions for determining a rover position having an added positional error controlled by the synthetic offset vector. For another embodiment a secure rover station dithers a secure position with a synthetic offset vector for providing an unsecure rover position having the added positional error.
19 Citations
24 Claims
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1. A global navigation satellite system (GNSS) reference system for controlling accuracy of a geographical position of a rover station, comprising:
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a reference global navigation satellite system (GNSS) receiver for measuring a reference phase of a GNSS signal; a vector generator for providing a synthetic offset vector; and a reference data provider for issuing reference data including said reference phase and said synthetic offset vector, said reference data for use by a rover station for providing a rover position having an added positional error proportional to said synthetic offset vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling accuracy of a geographical position of a rover station, comprising:
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measuring a reference phase of a global navigation satellite system (GNSS) signal with a reference GNSS receiver; generating a synthetic offset vector; and issuing reference data including said reference phase and said synthetic offset vector, said reference data for use by a rover station for providing a rover position having an added positional error proportional to said synthetic offset vector. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A tangible medium containing a set of instructions for causing a processor to carry out the following steps for controlling accuracy of a geographical position of a rover station, comprising:
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measuring a reference phase of a global navigation satellite system (GNSS) signal with a reference GNSS receiver; generating a synthetic offset vector; and issuing reference data including said reference phase and said synthetic offset vector, said reference data for use by a rover station for providing a rover position having an added positional error proportional to said synthetic offset vector. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification