| 摘要 |
PURPOSE:To obtain a GPS receiving apparatus which absorbs the position jump and the error increase of a present position due to a change in the spatial arrangement of a satellite and due to change in receiving or nonreceiving. CONSTITUTION:The GPS receiving apparatus is provided with a computation means 15 for present position of receiving apparatus by a pseudo-distance. In addition, a computation means 13 for preaent position of receiving apparatus by a pseudo-destance difference takes out only a pseudo distance distance regarding a satellite receivable at a present time from a pseudo distance, at an arbitrary past time, which has been recorded in advance, and it finds a receiving- apparatus movement difference up to the present time from the arbitrary time on the basis of a difference between the pseudo distance of every satellite at a present time and a pseudo distance at an arbitrary time. Then, the receiving- apparatus movement difference is added to a receiving position at an arbitrary time, and a present receiving position is computed. |
