Landsat 8影像像元地理坐标计算  

Calculation of Landsat 8 Image Pixel Geodetic Coordinates

作　　者：张浩[1,2] 葛小青[1] 冯旭祥[1] 

机构地区：[1]中国科学院遥感与数字地球研究所,北京100094 [2]中国科学院大学,北京100094

出　　处：《遥感信息》2013年第5期52-58,共7页Remote Sensing Information

摘　　要：在遥感卫星数据处理中,计算影像中像元对应地面点的地理坐标不仅是遥感影像数据编目的主要工作之一,同时也是各级几何校正的基础,其计算精度直接影响数据产品处理的几何精度。本文在充分了解Landsat 7卫星和SPOT5卫星像元地理坐标计算算法的基础上,对USGS提出的Landsat 8卫星像元地理坐标计算算法进行了系统性整理和研究,并比较了3种传感器间扫描方式和探测器排布的差异造成计算方法的差异,最后以一景Landsat 8的模拟数据为样本,以GLS2005地面控制点库为参考,将本文介绍算法得到的坐标与控制点库坐标作了对比分析,结果验证了该算法的有效性。During the processing of the remote sensing satellite data,calculating the corresponding ground points'geographic coordinates of image pixels is an important procedure,which is not only the main task of cataloging the remote sensing(RS)images but also the basis of geometric correction of all levels,and whose computation precision has a direct impact on the geometric accuracy of the RS data processing.After understanding the algorithms of calculating geographic coordinates based on the data of Landsat7and SPOT5,this paper systematically organized and researched the geographical coordinates algorithm of Landsat8data proposed by USGS.And then it compared the differences of algorithms which are caused by the scanning method and the detector arrangement of the three kinds of sensors.Finally,taking a scene of simulated data of Landsat8for an example,this paper compared the results obtained through the method introduced above with the GLS-2005ground control points,which well verified the effectiveness of the algorithm.

关 键 词：LANDSAT 8 视线矢量 像元地理坐标 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]