The invention discloses a domestic land observation satellite attitude and orbit refining method based on cloud control. The method comprises the steps of: based on a reference base map formed by an existing digital orthoimage and a digital surface model or a digital elevation model, performing control point automatic measurement between a 1A-level standard scene image and a reference base map; acquiring control point data, logically splicing 1A-level images through scene division information of a standard scene, recovering original strip image information, performing strip adjustment based onan original attitude and orbit by combining data such as line time, a GPS orbit and an attitude of a strip image, and resolving accurate attitude parameters, meanwhile, analyzing the distribution rule of image point residual errors, and carrying out internal orientation geometric calibration on the CCD linear array of the satellite according to the residual error rule, and finally, refitting rational polynomial parameters RPC of the standard scene 1A image according to the calibrated interior orientation elements and the calculated accurate orbit and attitude (namely exterior orientation elements).
本发明公开了一种基于云控制的国产陆地观测卫星姿轨精化方法,该方法基于已有数字正射影像和数字表面模型或数字高程模型构成的参考底图,进行1A级标准景影像与参考底图之间的控制点自动量测,获取控制点数据,通过标准景的分景信息对1A级影像进行逻辑拼接,恢复原始条带影像信息,结合条带影像的行时、GPS轨道、姿态等数据,进行基于原始姿轨的条带平差,解算精确的姿态参数。同时,分析像点残差的分布规律,并根据残差规律对卫星的CCD线阵进行内方位几何检校。最后根据检校后的内方位元素和解算的精确轨道、姿态(即外方位元素),重新拟合标准景1A影像的有理多项式参数RPC。
Domestic land observation satellite attitude and orbit refining method based on cloud control
基于云控制的国产陆地观测卫星姿轨精化方法
14.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC: | B64G Raumfahrt , COSMONAUTICS |
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