Sensitivity analysis of orientation error of airborne laser autonomous positioning to gas pipeline

Key words:  airb)me laser  buried pipeline  autonomous positioning  positiuning error  error analysis

Abstract:

Based on the particular application background of the remote sensing detection of the buried natural gas pipeline leak by the airborne aser, the accurate positioning of the buried natural gas pipeline hy the laser is prerequisite. The bai>ic theory of the airborne laser-to-ground positioning system was briefed and the realized method was introduced, and the influence of the laser on the positioning system was analyzed. Hie general error equation of this remote sensing system was derived from the error propagation law and ihe accuracy under different conditions was estiraatei!. The results show that the position and orienlation accuracy of the airbome is the main factor affecting the positioning accuracy. The error in pitch angle plays a more important role in grounil point error，while the, roll angle has little effett. Under the consideration of point positioning accuracy, ihe influonre of the error in altitude is the least. These analysis results can enhance the effn iency of error prevention and error compensation.