Positioning Model and Accuracy Evaluation of Conical Scanning Airborne Laser Bathymetry System

doi:10.11947/j.AGCS.2016.20150161

Abstract

Abstract: Conical scanning airborne laser bathymetry system with fixed angle is selected as a research object to deduce the vector equation of laser in the prism, the atmosphere and the water from the internal structure of the laser rangefinder. Then the vector equation is combined with GPS/INS to deduce positioning model of foot laser point in mapping coordinates. The factors that influence the positioning accuracy of the airborne laser bathymetry system are fully considered and comprehensive accuracy evaluation model of conical scanning airborne laser bathymetry system is given with the use of error propagation law. System parameters, indicators which are widely used in the world are used to calculate the positioning accuracy of airborne laser bathymetry system. The main sources of error involved in positioning model are analyzed and discussed.

Key words: fixed angle conical scan, airborne laser bathymetry, positioning model, accuracy evaluation

CLC Number:

P225.2

LI Kai, ZHANG Yongsheng, TONG Xiaochong, SHEN Erhua. Positioning Model and Accuracy Evaluation of Conical Scanning Airborne Laser Bathymetry System[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(4): 425-433.

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