Patent ID: 7898474

Claim:
A positioning device that receives a satellite signal from a satellite positioning system (SPS) satellite and locates a present position, the positioning device comprising: an azimuth calculation section that calculates an azimuth of the SPS satellite corresponding to the received satellite signal; a reception environment determination section that determines a reception environment including a multipath environment based on the azimuths of the SPS satellites calculated by the azimuth calculation section; and a positioning section that locates the present position based on the reception environment, the reception environment determination section determining that the SPS satellites are biased toward an angle of a center region when a first bias condition is satisfied, the first bias condition being satisfied when the number of strong signal satellites located in the center region is almost equal to the number of strong signal satellites located in adjacent regions of the center region, the strong signal satellites corresponding to a satellite signal within a predetermined signal strength range, and the center region and the adjacent regions being defined by equally dividing an angular range of 360 degrees into at least eight regions.