In order to apply the satellite positioning to train control, a method of the positioning with the one-dimensional constraint condition which can reduce the number of necessary satellites by using line coordinate data in the positioning calculation and the multipath error reduction method using the given value, the different physical phenomenon, and the satellite redundancy was developed. The evaluation system was built, and the positioning performance was evaluated using the positioning satellite observational data acquired on operating lines, and as a result, it was confirmed that large errors were reduced and the degradations of the positioning rate were also few.

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