| 摘要 |
<P>PROBLEM TO BE SOLVED: To measure the position of a mobile body more reliably and accurately. Ž<P>SOLUTION: The mobile body positioning apparatus includes: a reception means for receiving signals from a plurality of satellites; an observed pseudo range calculating means for calculating an observed pseudo range based on the signals received by the reception means; and a positioning computation means for performing repeated positioning computation based on the observed pseudo range calculated by the observed pseudo range calculating means. The mobile object positioning apparatus further includes an estimated pseudo range calculating means for calculating an estimated pseudo range by adding a variation of ADR (Accumulated Doppler Range) to a distance determined from a last positioning result and the position of the satellite while the positioning computation means is performing repeated positioning computation. Under a predetermined condition, the positioning computation means performs positioning computation by using an estimated pseudo range calculated by the estimated pseudo range calculating means as a substitute for an observed pseudo range calculated by the observed pseudo range calculating means. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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