摘要
随着卫星技术的飞速发展,光学遥感卫星具备了在一个轨道弧段内对多点目标成像的能力。对光学遥感卫星而言,一般通过构建严密几何成像模型来实现影像的高精度几何定位,该过程需要获取每一成像行所对应的轨道数据。然而卫星在对点目标成像时,轨道观测值不足导致难以获取每一成像行的轨道数据。本文提出了一种基于简化普适摄动模型的单点轨道数据处理方法,由卫星的位置速度结合SGP4模型生成两行根数,从而为每一成像行提供轨道数据,进一步完成影像的几何定位。实验结果表明该方法的轨道处理精度高,几何定位结果可靠,精度与标准影像产品几何定位精度基本相当,对于光学遥感卫星的影像处理具有一定的意义。另外,使用STK软件生成的仿真轨道数据进行实验表明,本文方法对于轨道倾角适中的卫星,其数据处理的精度相对较高。
With the rapid development of satellite technology,optical remote sensing satellites have the capability to image multiple point targets within a single orbital arc.For optical remote sensing satellites,high precision geometric posi⁃tioning of images is generally achieved by constructing a tight geometric imaging model,which requires the acquisition of orbital data corresponding to each imaging row.However,when satellites image point targets,insufficient orbital observations make it difficult to obtain orbital data for each imaging row.This paper proposes a single-point orbit data processing method based on the SGP4 model,which generates TLE(Two-Line Element)from the position velocity of the satellite combined with the SGP4(simplified general perturba⁃tions)model,so as to provide orbit data for each imaging line and further complete the geometric positioning of the image.The experimental results show that the method has high accuracy of orbit processing,reliable geometric positioning results,and the accuracy is basically comparable to the geometric positioning accuracy of standard image products,which is of some significance for the image processing of optical remote sensing satellites.In addition,the experiments using the simulated orbit data generated by STK software show that the method of this paper has relatively high accuracy of data processing for satellites with moderate orbit inclination.
作者
王密
陈俊博
金淑英
WANG Mi;CHEN Junbo;JIN Shuying(State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China)
出处
《测绘地理信息》
CSCD
2024年第4期1-6,共6页
Journal of Geomatics
基金
国家重点研发计划(2022YFB3902804)
关键词
轨道数据处理
两行根数
轨道倾角
orbital data processing
two-line elements
orbit inclination
作者简介
第一作者:王密,教授,主要从事遥感影像精准处理与遥感星群实时智能服务研究。E-mail:wangmi@whu.edu.cn;通讯作者:陈俊博,硕士生,从事低轨光学遥感卫星任务规划研究与遥感数据预处理。E-mail:chenjunbo@whu.edu.cn
