A high precision measuring device is required during the fixed-wing aircraft landing. In order to improve accuracy of laser scanning system, a scanning measurement model is established to carry out error analysis. The measurement error simulation is carried out for two cases without sea-wave disturbance and sea-wave disturbance, and the variation law of angle measurement error is obtained. The results show that the angle error becomes lager as the plane gets closer and closer to the landing point, and the error reaches the maximum when the plane landed. The wave disturbance will cause a small range of jitter in error curve, and the amplitude will increase slightly. The result provides a theoretical reference for the compensation correction of laser scanning measurement system.
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