基于RFM与平面高程控制分离的立体定位研究

Study of Stereoscopic Location Based on RFM and the Separation of Plane and Elevation Control

星载激光测高技术应用于高分辨率光学立体测绘卫星,辅助航天摄影测量以提高卫星几何精度将成为一种重要的技术手段。针对复合测绘这一思路,文章基于有理函数模型(rational function model,RFM)进行立体定位研究。初步建立了高分辨率遥感卫星基于平面控制和高程控制数据分离的区域网平差模型,以天津地区"资源三号"卫星影像作为试验数据,并利用直接前方交会定位模型、RFM系统误差补偿模型、立体区域网平差模型对构建的模型进行精度验证。试验结果表明,基于平面控制和高程控制数据分离的区域网平差可以提高卫星影像的几何定位精度,且精度与其它模型相当,证明了平面高程控制数据分离进行RFM区域网平差的有效性和可行性。

In order to improve the geometrical accuracy of the satellite, it will be a important technical means in assisting space photogrammetry to apply the space-borne laser altimeter technique into high resolution optical stereo mapping satellite. In this paper the stereotaxic research was based on rational function model（RFM）. The block adjustment model of the high resolution remote sensing satellite was established in terms of the separation of plane and elevation control. Taking the ZY-3 satellite images of Tianjin region as testing data, the accuracy of the established model was validated by three given models, that is the direct forward intersection, the RFM system error compensation and stereoscopic block adjustment model. The experimental results showed that the geometric positioning accuracy can be improved based on the separation of plane and elevation control block adjustment, with its value similar to other models. Therefore, it is effective and feasible using the separation of plane and elevation control for block adjustment.