基于GPS实测控制点的SPOT 5 1A数据几何校正方法精度比较
陈 华,安 娜,杨清华
中国国土资源航空物探遥感中心,北京 100083
GEOMETRIC CORRECTION METHODS OF SPOT5 1A DATA BASED
ON GPS-MEASURED GROUND CONTROL POINTS
CHEN Hua, AN Na, YANG Qing-Hua
China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China
摘要 采用高精度的星基差分GPS实测控制点对SPOT 5 1A数据几何校正方法进行比较,对校正误差的产生原因进行分析。结果表
明,正射模型法的校正精度远高于多项式法的校正精度;多项式法在X方向上的误差远大于Y方向上的误差;正射模型法的误差在2个
方向上差别不大。卫星扫描角度引起的像元畸变是多项式方法产生较大误差的重要原因。
关键词 :
遥感信息 ,
生物地球化学 ,
植被 ,
金矿远景区
Abstract :Using the high resolution ground control points measured by satellite-based DGPS (Differential Global
Positioning System), this paper compared two geometric correction methods for SPOT5 data and analyzed the causes
of correction errors. The results show that the accuracy of the orthorectification model method is better than
that of the polynomial method. The errors of the polynomial method in Y axis are bigger than those in X axis, but
the error difference in Y axis and in X axis is not obvious for the orthorectification model method. The pixel
distortion caused by the satellite observation angle is the main cause for the bigger errors of the polynomial
method.
Key words :
Remote senisng information
Vegetation
Biogeochemistry
Gold prospect areas
收稿日期: 2007-08-20
出版日期: 2009-07-23
通讯作者:
陈华(1977-),男,博士,主要从事土地资源、遥感与地理信息系统研究与应用。
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