Gps navigator

Abstract

Abstract PURPOSE:To achieve a highly accurate measurement of a position, by arranging a satellite position computing section, a user's operating section, a map information section and the like to select the combination of the optimum satellites in an area involved. CONSTITUTION:Based on an output of a bearing sensor section 1, a moving direction detecting section 2 checks in which direction an automobile runs and an output thereof is connected to an input of a reception probability computing section 11. A user's operating section 4 receives inputs of a date of running and the initial position thereof and is connected to an input of a satellite position computing section 3. The computing section 3 computes the position and the number of satellites presently existing in the sky based on the date and the initial position information from the operating section 4 and an almanac data from a data demodulation/pseudo distance computing section 9. Moreover, a map information section 5 stores a map indicating a road, buildings and the like in an area where an automobile is scheduled to run and information indicating a distribution of buildings in the area beforehand. In this manner, the combination of the optimum satellites in the area is selected thereby enabling highly accurate measurement of a position.

Inventors

• 👤 Kunitoshi Nishikawa
• 👤 Yoshitoshi Fujimoto
• 👤 Koichi Asano

Bibliographic Details