GEOID MEASUREMENT METHOD, GEOID MEASUREMENT APPARATUS, GEOID ESTIMATION DEVICE, DATA COLLECTION DEVICE FOR GEOID CALCULATION

摘要

To easily estimate a change in geoid height.SOLUTION: In a geoid measurement method of the present invention performs an inertia measurement data acquisition step, a comparison data acquisition step, a status variable estimation step, and a geoid calculation step. In the inertia measurement data acquisition step, data about a speed, a position, and a position angle are acquired as inertia derived data on the basis of output from an inertia measurement unit having a three-axis gyro and a three-axis accelerator, which are mounted on a moving body. In the comparison data acquisition step, data about a speed is acquired as comparison data from a unit other than the inertia measurement unit. In the status variable estimation step, using the inertia derived data and the comparison data, a Kalman filter including a vertical line deviation in a status variable is performed to estimate the status variable including the vertical line deviation. In the geoid calculation step, based on the estimated vertical line deviation, a change in geoid height at the estimated position can be obtained.SELECTED DRAWING: Figure 1