| 摘要 |
PROBLEM TO BE SOLVED: To improve the position determination accuracy by correcting an error included in reinforcement data by an SBAS (satellite navigation reinforcement system) receiver that is installed at an already known point and utilizing it for the SBAS receiver at an unknown point. SOLUTION: An error operation part 24 is provided at an SBAS receiver 10 at a known point, a pseudo distance is calculated based on the navigation data of a GPS and the reinforcement data of the SBAS, and at the same time, the true distance between the GPS satellite and the SBAS receiver 10 at a known point based on the position of the GPS satellite included in the navigation data and the position of the SBAS receiver 10 at a known point. Then, based on the calculated pseudo distance and the true distance, an error included in the reinforcement data is calculated and is transmitted to the SBAS receiver at a known point. The SBAS receiver at the known point receives the error and uses it for correcting the reinforcement data that it receives itself.
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