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基于GCP的基线估计提取高精度DEM研究
引用本文:师红云,杨松林,魏庆朝,杜勇.基于GCP的基线估计提取高精度DEM研究[J].北方交通大学学报,2011(4):112-115.
作者姓名:师红云  杨松林  魏庆朝  杜勇
作者单位:北京交通大学土木建筑工程学院,北京100044
基金项目:国家“863”计划项目资助(2009AAl22131)
摘    要:合成孔径雷达干涉测量(In&垛)技术因其独特优势,正逐渐成为高精度数字高程模型(DEM)获取的有力工具,而基线参数估计是利用该技术提取高精度DEM的重要影响因素.本文在现有的基线精确估算方法的基础上,利用典型的基于地面控制点(GCP)法编制了基线估算代码,采用C波段ENVISATASAR雷达数据,对比分析了各算法基线改正的结果,利用校正后的基线参数提取了都江堰地区的DEM,并结合该地区的1:10000地形图对生成的DEM进行了精度评定.研究结果表明,采用基线校正后的数据进行干涉测量生成的DEM在一定条件下能达到国家1:50000数字高程模型三级产品的精度要求.

关 键 词:基线估计  (池P法  数字高程模型  雷达干涉测量  ASAR

Precision study on the DEM generated from estimation of baseline parameters based on GCP
SHI Hongyun,YANG Songlin,WEI Qingchao,DU Yong.Precision study on the DEM generated from estimation of baseline parameters based on GCP[J].Journal of Northern Jiaotong University,2011(4):112-115.
Authors:SHI Hongyun  YANG Songlin  WEI Qingchao  DU Yong
Institution:(Scheol of Civil Engineering, Beijing Jiaotong University, Beijing 100044,China)
Abstract:InSAR (Synthetic Aperture Radar Interferometry), for its special advantages, has been a new approach to obtaining DEM with high-accuracy quickly. And the estimation of baseline parame- ters is a major influence factor for the precision of DEM generated from InSAR. The baseline estimation codes of the typical algorithms are worked out based on GCP (Ground Control Points), and the results are analyzed comparatively from several baseline corrections using ENVISAT ASAR data oper- ating C-band. Then the DEM of Dujiangyan is generated with InSAR technology and the precision of DEM is evaluated by comparing with the local 1 : 10 000 national standard topographic map. The result demonstrates that the precision of DEM after baseline correction based on GCP can satisfy the demands of the three-level products of the national 1 : 50 000 DEM conditionally.
Keywords:baseline estimation  GCP  DEM  InSAR  ASAR
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