| 摘要 |
<p>The purpose of the present invention is to shorten the time to calculate the initial position for position calculation based on a satellite signal for positioning. When calculating the initial position that does not have the ephemeris the position calculator (1) receives positioning support information superimposed on a quasi zenith satellite signal issued from a quasi zenith satellite (5) predicts the satellite orbit of a GPS satellite (3) on the basis of the position and speed of the GPS satellite (3) contained in the positioning support information and calculates the position using the ephemeris estimated from the predicted satellite orbit.</p> |
