关键词: 外测, 跟踪部位, 遥测, 轨迹参数, 误差传播法, 修正精度

Abstract: Tracking position correction of exterior trajectory measurement data plays a key role in high accurate trajectory acquisition for aircraft fight experiment. A new method for tracking position correction using telemetry attitude data and rough trajectory parameters of aircraft is proposed in this paper. The transformation relationship of trajectory parameters between the platform center of inertial navigation and the tracking position is obtained by utilizing telemetry attitude data, and the difference numerical value of distance measurement, radial velocity, azimuth and elevation between the platform center of inertial navigation and the tracking position are calculated via rough trajectory parameters. Then the precise calculation for correction quantity of tracking position is achieved. The precision of tracking position correction under the influence of the rough trajectory errors is theoretically analyzed by using the method of errors propagation. Then the validity of this correction method in practical applications is verified. Both simulation experiment and field test are further given to demonstrate the precision of correction. Experimental results show that the calculation errors of tracking position correction are much less than the precision target of exterior trajectory measurement system. It is indicated that the proposed method has significant application value in practice.

Key words: exterior trajectory measurement, tracking position, telemetry, trajectory parameters, method of errors propagation, precision of correction