Patent ID: 8604972
Filing Date: 2013-12-10
Classification: G01S

Abstract:
1. A position measuring device by means of GPS, the device measuring a three-dimensional position of a moving object based on GPS ranging data obtained at a reference station that is a reference GPS receiver installed on ground and GPS ranging data obtained at an observation station that is an observation GPS receiver disposed on the moving object to be located, the position measuring device comprising multiple solution calculating sections that receive the GPS ranging data from the reference station and the GPS ranging data from the observation station and calculate RTK solutions, including a fixed solution and a float solution, as position data of the observation station according to a real time kinematic (RTK) technique, the solution calculating sections being sequentially restarted at predetermined time intervals, the position measuring device further comprising a solution obtaining unit for receiving the RTK solutions outputted from said solution calculating sections and obtaining an optimum fixed solution; the solution obtaining unit comprising: