Accurate Positioning of Laser Radar Target Area

Abstract

In order to evaluate spacial stuructures of atmosphere from laser radar data, the location of target area must be accurately positioned. But, the usual method of positioning has a couple of error factors, such as earth curvature, laser beam refraction and change of light velocity. Although the influences of these factors can be treated theoretically based on the light ray equation, the numerical integration included in the calculation of accurate positioning has come into question in practice.
In this paper, a practical method for accurate positioning is proposed. The proposed method utilizes the simplified relations between the accurate positioning and the usual positioning based on the results of numerical calculations. The accuracy of the proposed method is also considered. In addition, the laser radar data with different elevation angles are analyzed to demonstrate the importance of accurate positioning.