GNSS-BASED POSITION FINDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a GNSS-based position finding apparatus that can measure the absolute positions of two measurement points at low cost and high accuracy without having to install a separate reference point and can further ensure real-time performance.SOLUTION: There is provided a GPS-based position finding apparatus 1 for measuring the positions of two measurement points A and B, at each of which a GPS receiver R is installed. The GPS-based position finding apparatus comprises: a precise point positioning part 12 that measures the absolute positions of measurement points A and B by precise point positioning; a relative position calculating part 31 that calculates from these two measured absolute positions the relative position of B based on the measurement point A; a kinematic positioning part 11 that measures by kinematic positioning the relative position of B based on the measurement point A; a relative position error calculating part 35 that calculates any relative position error by subtracting the relative position of the relative position calculating part 31 from the relative position of the kinematic positioning part 11; and an absolute position correcting part 38 that corrects the absolute positions of the measurement points A and B by using at least the relative position error and the absolute positions measured by the precise point positioning part 12.