| 摘要 |
The time to first fix in position calculation based on positioning satellite signals is to be reduced. A position calculation apparatus 1 receives positioning support information superimposed on a quasi-zenith satellite signal transmitted by a quasi-zenith satellite 5 at the first position calculation without ephemerides, predicts satellite orbits of GPS satellites 3 based on positions and velocities of the GPS satellites 3 contained in the positioning support information, and performs position calculation using the ephemerides estimated from the predicted satellite orbits. |
