三轴稳定型静止轨道遥感卫星地理定位快速算法  

A Fast Algorithm for Geolocation of Three-axis Stabilization Geostationary Remote Sensing Satellite

作　　者：李贺[1] 童晓冲[1] 章程 王智超 李树林 LI He;TONG Xiaochong;ZHANG Cheng;WANG Zhichao;LI Shulin(Information Engineering University,Zhengzhou 450001,China;61175 Troops,Nanjing 210000,China;32033 Troops,Haikou 570100,China;Zhengzhou Xinda Institute of Advanced Technology,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,河南郑州450001 [2]61175部队,江苏南京210000 [3]32033部队,海南海口570100 [4]郑州信大先进技术研究院,河南郑州450001

出　　处：《测绘科学技术学报》2025年第1期37-41,48,共6页Journal of Geomatics Science and Technology

基　　金：河南省自然科学基金项目(222300420592)。

摘　　要：三轴稳定型静止轨道遥感卫星具有高时间分辨率的特点,在气象预报、环境监测等领域发挥着重要作用。通过分析静止轨道遥感卫星常规地理定位方法和国际气象卫星协调组织CGMS(Coordination Group for Meteorological Satellites)标称网格发布格式,提出一种针对三轴稳定型静止轨道遥感卫星图像地理定位的快速算法。首先,构建传感器各个探元的初始入射视向量;随后,经卫星平台东西镜和南北镜反射,得到载荷坐标系下的出射向量;最后将该向量转换到卫星本体坐标系,且依次经过卫星轨道坐标系和地固坐标系的转换,得到理想情况下的CGMS标称网格下的镜子转角,该镜子转角即可转换到唯一对应的CGMS标称网格位置,完成数据的定位。该算法省略了光线视向量从地固坐标系出发与大地椭球面求交点计算的复杂过程,在不损失定位精度的情况下,时效性能较常规地理定位方法提升了83.3%。The three-axis stabilization geostationary remote sensing satellite has the characteristics of high time resolution and plays an important role in the fields of weather forecasting and environmental monitoring.A fast image geolocation method for three-axis stabilization geostationary satellites is proposed by analyzing the conventional geolocation methods and CGMS nominal grid publishing format in this paper.Firstly,the initial incident view vector of each detector of the sensor is constructed.Then the outgoing vector of the payload coordinate system is obtained through the reflection of the east-west mirror and the north-south mirror of the satellite platform.Finally,the vector is converted to one in the satellite body coordinate system.Through the conversions of the satellite orbit coordinate system and the Earth-Fixed Coordinate System in turn,the mirror rotation angle under the ideal CGMS grid can be obtained,which can be converted to the only corresponding CGMS nominal grid position to complete the data positioning.The algorithm omits the complex process of calculating the intersection point between the light vector and the geodetic ellipsoid sphere from the Earth-Fixed Coordinate System,and the computational efficiency is improved by 83.3%compared with that of the conventional geolocation method without losing the positioning accuracy.

关 键 词：三轴稳定 静止轨道 遥感卫星 标称网格 地理定位快速算法 

分 类 号：P231[天文地球—摄影测量与遥感]