A Solving Method for the Boresight Misalignment of Airborne IMU Based on Relative Orientation

Abstract

Abstract:

The boresight misalignment of airborne Inertial Measure Unite (IMU) is introduced into relative orientation model of aerial stereo image pairs using the inherent relative geometric relationship between aerial images, and a novel method to solve the boresight misalignment of airborne IMU based on relative orientation is proposed. The mathematical models for solving the boresight misalignment of airborne IMU are derived in detail based on a single stereo model and multiple consecutive stereo models, respectively. Then, three sets of actual images obtained with IMU are tested. The empirical results show that the mathematical model established is correct and feasible, and the boresight misalignment could be solved using multiple consecutive stereo models constituted by more than three adjacent aerial images. The method proposed in this paper could avoid many problems brought about by setting calibration field and the other ground control conditions, and it is beneficial for direct and quick georeferencing when using aerial remote sensing equipment with airborne IMU.

Key words: airborne inertial measure unite, boresight misalignment, relative orientation

CLC Number:

P231

References

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