长江科学院院报 ›› 2016, Vol. 33 ›› Issue (2): 115-117.DOI: 10.11988/ckyyb.20140767

• 信息技术应用 • 上一篇    下一篇

基于二次曲面拟合的GBSAR大气扰动误差模型研究

汪学琴1,2, 岳建平2, 邱志伟2, 桑杰3   

  1. 1.水能资源利用关键技术湖南省重点实验室,长沙 410014;
    2.河海大学 地球科学与工程学院,南京 210098;
    3.西藏自治区水利电力规划勘测设计研究院,拉萨 850000
  • 收稿日期:2014-09-02 出版日期:2016-02-01 发布日期:2016-02-17
  • 作者简介:汪学琴(1991-),女,安徽芜湖人,硕士研究生,研究方向为大地测量与测量工程、雷达遥感和图像处理等,(电话)15751873996(电子信箱)wxqstay@163.com。
  • 基金资助:
    国家自然科学基金项目(41174002);水能资源利用关键技术湖南省重点实验室开放研究基金项目(PKLHD201311);江苏省普通高校研究生科研创新计划项目(KYLX_0498)

A Model for Error Distribution of Atmospheric Disturbance in Ground-based SAR on Account of Quadric Surface Fitting

WANG Xue-qin1,2, YUE Jian-pin2, QIU Zhi-wei2, SANG Jie3   

  1. 1.Hunan Provincial Key Laboratory of Key Technology on Hydropower Development, Changsha 410014,China;
    2.Earth Science and Engineering , Hohai University, Nanjing 210098, China;
    3.Planning and Design Institute of Water Conservancy and Electric Power of Tibet Autonomous Region , Lasa 850000, China
  • Received:2014-09-02 Online:2016-02-01 Published:2016-02-17

摘要: 大气扰动误差是地基合成孔径雷达(GBSAR)观测的主要误差之一,它与大气环境的变化密切相关,受大气扰动干挠影响随时间和空间的变化而发生改变。通过分析大气扰动误差在时间和空间上的变化特性,采用二次曲面函数建立大气扰动的分布模型,利用多个固定点解算模型参数,进而估算整个测区任意位置的大气扰动误差。试验结果表明,该方法有效改正了大气扰动误差,提高了GBSAR观测结果的精度。

关键词: GBSAR, 大气扰动, 误差改正, 分布模型, 改正残差

Abstract: Atmospheric disturbance effect is one of the major factors which affect the measurement precision of system of ground-based synthetic aperture radar (GBSAR). It is closely relevant to the changes of atmospheric environment, and it varies with time and space. By analyzing spatial-temporal variation characteristics of error of atmospheric disturbance, we introduce function of quadric surface to establish a distribution model for atmospheric disturbance. Moreover,we use ground control points to obtain parameters of the model and to estimate the error at any position of overall testing area. Results suggest that the error of atmospheric disturbance is reduced and the accuracy of GBSAR measured data is improved by using this model.

Key words: ground-based synthetic aperture radar (GBSAR), atmospheric disturbance, error correction, distribution model, residual correction

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