| 摘要 |
PURPOSE:To improve accuracy for measuring a position, and also, to reduce a circuit scale by measuring a response time error of every machine of a moving terminal station in advance and adding this response time error information to a response signal. CONSTITUTION:A response signal to a signal which has been sent from an operation center 4 is outputted, for instance, by a head of a frame of the signal. With respect to a timing of the head of the frame of this signal, a response time error of the timing by which the response signal is outputted is measured in advance, and data based on this response time error is stored in a time error data memory of mobile units 5A, 5B. The data which has been stored in this time error data memory is added to the response signal and sent to the operation center 4. By this response time error, the time when the response signal reaches the operation center 4 through satellites 1-3 is corrected.
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