Patent Document ID: 20150141041
Application ID: 14400944
Patent Flag: 0

Claim One:
1. A positioning and tracking device comprising: an observed value acquiring unit that acquires observed values of a plurality of receiving stations for each of observation points leading from a tracking start point of a target to a tracking end point of the target; a Jacobian matrix calculator that calculates a Jacobian matrix of observed values associated with all the receiving stations by using the observed values acquired by said observed value acquiring unit; a positioning accuracy evaluation index calculator that calculates an evaluation index for positioning accuracy for said target by using the Jacobian matrix calculated by said Jacobian matrix calculator; a tracking error covariance matrix calculator that calculates a covariance matrix of positioning errors by using both the Jacobian matrix calculated by said Jacobian matrix calculator and a preset nominal observation error parameter, and that calculates a covariance matrix of tracking errors from the covariance matrices of positioning errors at first two observation points; a tracking error covariance matrix updater that updates the covariance matrix of tracking errors calculated by said tracking error covariance matrix calculator by using said nominal observation error parameter; a tracking accuracy evaluation index calculator that calculates an evaluation index for tracking accuracy for said target by using both the covariance matrix of tracking errors updated by said tracking error covariance matrix updater and said nominal observation error parameter; and an evaluation index presenter that presents the evaluation index for the positioning accuracy calculated by said positioning accuracy evaluation index calculator and the evaluation index for the tracking accuracy calculated by said tracking accuracy evaluation index calculator.