Recording medium for storing position estimation program, position estimation device, and position estimation method

A position estimation device for estimating a position of a positioning target, the position estimation device comprising:

• a positioning unit configured to perform positioning a plurality of times by receiving a signal from a plurality of transmitters and to generate error region information indicating an ellipse-shaped error region represented by a position acquired by the positioning and a measurement error of the position;
• an extension processing unit configured to extend the error region indicated by the generated error region information in a major axis direction the error region having a proportion of a semi-major axis to a semi-minor axis equal to or greater than a first threshold;
• an intersect region acquisition unit configured to acquire an intersect region at which the extended error region intersects with another extended error region;
• and
• an estimation unit configured to estimate the position of the positioning target based on the intersect region at which the extended error region intersects with another extended error region.

A position estimation device for estimating a position of a positioning target, the position estimation device comprising:

• a positioning unit configured to perform positioning by receiving a signal transmitted from a transmitter and to generate a position acquired by the positioning, degradation information of the position, and an angle of the degradation information in a major axis;
• an intersect region acquisition unit configured to acquire a plurality of pieces of information on the position and the angle from the positioning unit and to acquire an intersect region at which a plurality of pieces of line information specified on the basis of the degradation information and the acquired plurality of pieces of information on the position and the angle intersect with one another;
• an extending unit configured to extend the error region indicated by each piece of the acquired error region information in a major axis direction, the error region having a proportion of a semi-major axis to a semi-minor axis equal to or greater than a first threshold;
• and
• an estimation unit configured to estimate the position of the positioning target based on the intersect region acquired in the intersect region acquisition unit.