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应用科学学报 ›› 2006, Vol. 24 ›› Issue (6): 608-612.

• 论文 • 上一篇    下一篇

熵的地形信息分析在高程匹配中的应用

李雄伟, 刘建业, 康国华   

  1. 南京航空航天大学导航研究中心, 江苏南京 210016
  • 收稿日期:2005-08-31 修回日期:2005-11-17 出版日期:2006-11-30 发布日期:2006-11-30
  • 通信作者: 刘建业,教授,博导,研究方向:惯性技术、卫星定位、组合导航系统,E-mail:lyjac@nuaa.edu.cn E-mail:lyjac@nuaa.edu.cn

Analysis of Terrain Information Using Elevation Matching Based on Entropy

LI Xiong-wei, LIU Jian-ye, KANG Guo-hua   

  1. Navigation Research Center, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2005-08-31 Revised:2005-11-17 Online:2006-11-30 Published:2006-11-30

PDF

117

被引次数

68

摘要： 面向地形轮廓匹配(TERCOM)高程辅助导航,定义了地形独立因子和地形信息熵,详细阐述了地形信息熵的统计特性,提出了不同尺寸地形分块的熵值关系;提供了多项地形参数的数学模型,并运用地形的信噪比、粗糙度、坡度、相关长度以及地形信息熵,对数字高程模型(DEM)地形的导航性能和适配性进行了定性和定量的分析,给出了关系曲线图;通过在模拟地形上统计分析、设定阈值,运用地形信息熵进行了适配区域的选择,并得到了较好的导航性能指标;本文的分析结果可作为建立可导航地形数据库、局部适配区域评估、航线规划的重要依据.

关键词: 地形轮廓匹配, 相关适配性, 信息熵, 地形参数

Abstract: Terrain unaided factor and terrain information entropy are defined for the terrain contour matching (TERCOM) elevation-aided navigation system.Statistical characteristics of terrain information entropy are described, and the entropy relation between terrains of different sizes introduced.Mathematical models of various terrain parameters are presented, including SNR, roughness, slope, correlative length and terrain information entropy, etc.Based on a digital elevation model (DEM), qualitative and quantitative analyses are given with graphs of terrain navigation performance and suitability.By means of statistical analyses and threshold value settings, a suitable terrain is selected with better navigation performance.From the results a terrain database can be established for navigation, terrain suitability evaluation and flight course planning.

Key words: terrain parameter, information entropy, TERCOM, correlation suitability

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