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Mounting bias is the major error source of Airborne LIDAR system. In this paper, an automated calibration method for estimatingLIDAR system mounting parameters is introduced. LIDAR direct geo-referencing model is used to calculate systematic errors. Dueto LIDAR footprints discretely sampled, the real corresponding laser points are hardly existence among different strips. Thetraditional corresponding point methodology does not seem to apply to LIDAR strip registration. We proposed a VirtualCorresponding Point Model to resolve the corresponding problem among discrete laser points. Each VCPM contains a correspondingpoint and three real laser footprints. Two rules are defined to calculate tie point coordinate from real laser footprints. The ScaleInvariant Feature Transform (SIFT) is used to extract corresponding points in LIDAR strips, and the automatic flow of LIDARsystem calibration based on VCPM is detailed described. The practical examples illustrate the feasibility and effectiveness of theproposed calibration method

AUTOMATED MOUNTING BIAS CALIBRATION FOR AIRBORNE LIDAR SYSTEM