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为了验证空间相机摆扫成像立体定位的可行性,考虑成像比例尺变化、摆扫角测量精度、摆扫角稳定度和摆扫角速度等影响因素,建立了以总体设计中影响定位精度的各指标为参数的空间相机摆扫成像几何模型,推导了基于误差传播理论的定位精度计算方法,并对平面定位精度和高程精度进行了仿真,提出了摆扫成像方式条件下提高定位精度的有效措施。结果表明,在成像幅宽较大时,单线阵摆扫成像线阵长度较小情况下和双线阵推扫成像线阵长度较大情况下,可达到相近的定位精度,提高摆扫角测量精度、摆扫角稳定度及时间同步精度,可提高平面定位精度。摆扫成像立体定位精度仿真方法适用于大幅宽成像遥感卫星定位精度指标分配。
In order to verify the feasibility of stereo camera positioning in space-borne imaging, considering the influence factors such as the change of imaging scale, the measurement accuracy of sweep angle, the stability of swing-sweep angle and the swing-sweep angular velocity, the indexes that affect the positioning accuracy in the overall design are Parameters of space camera sweep imaging geometric model, the derivation of the error propagation based on the positioning accuracy of the calculation method, and the plane positioning accuracy and elevation accuracy of the simulation, put forward the sweep sweep imaging method to improve the positioning accuracy of the effective measures. The results show that in the case of larger imaging width, the linear positioning accuracy can be improved under the condition that the length of single line array is smaller and the length of double line array is larger, Accuracy, swipe angle stability and time synchronization accuracy, can improve the plane positioning accuracy. Swing imaging three-dimensional positioning accuracy simulation method for large-scale imaging remote sensing satellite positioning accuracy index allocation.