RTK positioning system and positioning method therefor
First Claim
1. An RTK (Real Time Kinematic) positioning system which determines positions with pseudolites substituting as GPS satellites, comprising:
- a plurality of pseudolites, each of which is located at a predetermined position;
a rover receiver for measuring code and carrier phase of signals transmitted from each of the pseudolites;
a stationary reference station located at a predetermined position and for measuring code and carrier phase of signals transmitted from each of the pseudolites;
a moving reference station for measuring code and carrier phase of signals transmitted from each of the pseudolites, and for moving;
a user processor unit for positioning the rover receiver based on code and carrier phase transmitted from the stationary reference station and the moving reference station respectively and code and carrier phase transmitted from the rover receiver; and
a data link to transmit each data from the stationary reference station, the moving reference station and the rover receiver to the user processor unit, wherein a position of the stationary reference station and each position of the pseudolites are known by the user processor unit.
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Accused Products
Abstract
The locations of pseudolites and the location of a stationary reference station are previously known by a user processing unit, and codes and carrier phase of signals transmitted from the pseudolites are measured by the stationary reference station, a moving reference station and a rover receiver. Data of the codes and the carrier phase measured by the stationary reference station, the moving reference station and the rover receiver are transmitted to the user processing unit using a data link. The user processing unit determines a baseline between the stationary reference station and the moving reference station, and a baseline between the moving reference station and the rover receiver. The two baselines and the previously known location of the stationary reference station are employed to determine the position of the rover receiver.
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Citations
40 Claims
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1. An RTK (Real Time Kinematic) positioning system which determines positions with pseudolites substituting as GPS satellites, comprising:
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a plurality of pseudolites, each of which is located at a predetermined position;
a rover receiver for measuring code and carrier phase of signals transmitted from each of the pseudolites;
a stationary reference station located at a predetermined position and for measuring code and carrier phase of signals transmitted from each of the pseudolites;
a moving reference station for measuring code and carrier phase of signals transmitted from each of the pseudolites, and for moving;
a user processor unit for positioning the rover receiver based on code and carrier phase transmitted from the stationary reference station and the moving reference station respectively and code and carrier phase transmitted from the rover receiver; and
a data link to transmit each data from the stationary reference station, the moving reference station and the rover receiver to the user processor unit, wherein a position of the stationary reference station and each position of the pseudolites are known by the user processor unit. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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3. An RTK (Real Time Kinematic) positioning system which determines positions with a GPS satellite and a pseudolite, comprising:
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a GPS satellite;
at least one pseudolite, each of which is located at a predetermined position;
a rover receiver for measuring code and carrier phase of signals transmitted from each of the GPS satellite and the pseudolite;
a stationary reference station located at a predetermined position and for measuring code and carrier phase of signals transmitted from each of the GPS satellite and the pseudolite;
a moving reference station for measuring code and carrier phase of signals transmitted from each of the GPS satellite and the pseudolite, and for moving;
a user processor unit for positioning the rover receiver based on code and carrier phase transmitted from the stationary reference station and the moving reference station respectively, and code and carrier phase transmitted from the rover receiver; and
a data link to transmit each data from the stationary reference station, the moving reference station and the rover receiver to the user processor unit, wherein a position of the stationary reference station and positions of the pseudolite are known by the user processor unit. - View Dependent Claims (4)
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22. An RTK positioning method, comprising the steps of:
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setting positions of pseudolites to be previously known by a user processor unit and setting a position of a stationary reference station to be known by the user processor unit;
measuring code and carrier phase of signals transmitted from the pseudolites by the stationary reference station, a moving reference station and a rover receiver held by a user, respectively;
transmitting code data and carrier phase data respectively measured in the stationary reference station, the moving reference station and the rover receiver to the user processor unit with a data link;
positioning the rover receiver based on code and carrier phase transmitted from the stationary reference station, the moving reference station and the rover receiver. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification