POSITIONING DEVICE AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To evaluate properly positioning accuracy without requiring external data such as autonomous navigation information.SOLUTION: A clock bias Be and a reception position are calculated from a pseudo distance including a clock bias error output from a GPS receiver 16, and a clock drift D is calculated based on clock bias Be of past n points or Doppler information output from the GPS receiver, and a reference clock bias Bs is estimated by using a regression expression or a Kalman filter based on the calculated clock drift D.