The effect of INS and GPS random error on positioning accuracy of airborne LIDAR system

The positioning of pin point coordinates is an important processing of LIDAR imaging. Although various rigorous lidar systematic error models have already existed, a general model for random error is yet to be constructed. In this paper, based on Schenk's geolocation equation, we analyze the INS and GPS random error, build the error models, and deduce the relationship between random error parameters and the offset of pin point coordinates. These models enable a quick calculation about the offset of pin point coordinates. At last we proceed with the numerical calculation. The numerical results show that our models are reasonable and effective.