摘要
地球静止轨道遥感卫星虽然处于相对于地球静止的状态,但由于内部因素和其他外部环境的影响,它对地球的指向方向可能包含几何误差,这个微小的误差在地球上将会造成一个显著的位置差异。为了有效地纠正该偏差,可以利用地球上海陆边界形成的特殊的模板结构,进行高精度的地标匹配,达到纠正卫星指向的作用。本文介绍了静止轨道遥感卫星地标特征模板制作的方法,具体完成了海陆边界的静止轨道投影网格化生成,静止轨道遥感数据在标称条件下的海陆边界地表投影转换,设计了地标模板上特征点的提取方法,完成了海陆边界矢量的特征区域选择,最后给出了地标数据库的建立方式。相关静止轨道遥感卫星在使用该方法生成的地标特征模板后,在地标匹配和定位精度检验方面取得了较高的准确性和稳定性。
The geostationary orbit remote sensing satellite is in a state of being stationary with respect to the earth,due to the influence of the internal factors and the external circumstances.It may contain a geometric error for the direction of the earth,and the small error will cause a significant difference in position on earth.In order to correct the deviation effectively,a special template structure formed on the earth＇ s sea-land boundary can be used to perform a high-precision landmark matching to correct the satellite pointing effect.This paper introduces the method of making landmark feature template for geostationary orbit remote sensing satellite,the compelation the creation of geostationary orbit projection mesh of the sea-land boundary,the transformation of geostationary orbit remote sensing data in the nominal conditions of the land surface projection.The extraction method of feature points on the landmark template is designed,the feature area selection of the land boundary vector is completed,and the establishment of the landmark database finally is given.The relevant stationary orbit remote sensing satellite has achieved high accuracy and stability in the landmark matching and positioning accuracy testing after using the landmark feature template generated by this method.
作者
霍门婕
石朗
童晓冲
HUO Menjie;SHI Lang;TONG Xiaochong(Information Engineering University,Zhengzhou 450001,China)
出处
《地理信息世界》
2018年第4期75-79,共5页
Geomatics World
基金
国家自然科学基金面上项目(41671409)资助
关键词
静止轨道卫星
地标模板
栅格化
地标库
标称网格
geostationary orbit satellite
landmark template
rasterize
landmark library
nominal grid
