计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (35): 174-176.

• 图形、图像、模式识别 • 上一篇    下一篇

TerraSAR图像无控制定位精度研究

颜 磊1,2,邵永社1,2   

  1. 1.同济大学 测量与国土信息工程系,上海 200092
    2.同济大学 遥感空间信息技术研究中心,上海 200092
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-12-11 发布日期:2011-12-11

Analysis of location precision in TerraSAR image without reference points

YAN Lei1,2,SHAO Yongshe1,2   

  1. 1.Department of Surveying and Geo-informatics,Tongji University,Shanghai 200092,China
    2.Research Center for Remote Sensing and Spatial Information,Tongji University,Shanghai 200092,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-12-11 Published:2011-12-11

摘要: 针对星载TerraSAR图像无地面控制点情况下的目标定位问题,在分析利用卫星星历数据的基础上,结合SAR距离模型和地球椭球模型,提出了一种TerraSAR图像的地面目标直接定位方法。通过杭州地区数据实验结果表明,TerraSAR图像在平均高程60 m的丘陵地区,无控制距离向和方位向的定位精度中误差分别达到24.588 m和12.265 m。

关键词: TerraSAR图像, 卫星星历, 无控制定位精度

Abstract: A method is developed in this paper to determine the location precision of a pixel in the TerraSAR image without any ground reference points.This method utilizes the spacecraft ephemeris data and the characteristics of the SAR data to estimate the three-dimensional coordinate of the arbitrary pixel.The experiment uses the TerraSAR image of Hangzhou where the average elevation is 60 m.The location precision can attain 24.588 m at the range and 12.265 m at the azimuth with this method.

Key words: TerraSAR image, spacecraft ephemeris, location precision without ground reference points