摘要
以昆仑山局部地区为例,利用ERS-1/2串接雷达干涉有效建立了高山地区数字高程模型,并以美国宇航局SRTM高程数据为标准,选取高相干系数点,采用多项式拟合法对实验生成的数字高程模型进行校正,得到实验区较高精度的数字高程模型。最后以SRTM高程数据和美国地质调查局GTOPO30高程数据作为基准,对实验生成的数字高程模型的精度进行统计分析和评价,并分析了影响ERS-1/2干涉测量精度的主要因素。实验结果表明:采用ERS串接雷达干涉和基于多控制点的多项式拟合校正,可有效建立高山地区高精度的数字高程模型;在我国西部地区,建议采用ERS-1/2串接雷达干涉建立或更新数字高程模型。
Taking a localized area in Kunlun Mountain as an example,the digital elevation model (DEM) in the highly mountainous area is effectively generated with ERS-1/2 tandem radar interferometry. The accuracy of the achieved DEM is assessed statistically by taking SRTM DEM and USGS GTOPO30 DEM as the benchmark. The main reason affecting the accuracy of interferometry with ERS tandem radar is discussed. The experimental results show that ERS tandem radar interferometry can be used to successfully extract DEMs for highly mountainous areas. It is therefore recommended that ERS tandem radar interferometry might be applied to generate or update DEMs for the western parts of China.
出处
《遥感技术与应用》
CSCD
北大核心
2009年第3期291-296,I0002,共7页
Remote Sensing Technology and Application
基金
国家自然科学基金(40774004)
"地球探测与信息技术"教育部重点实验室开放基金(2008DTKF003)
关键词
串接雷达干涉
高山地区
数字高程模型
精度评定
校正
Tandem radar interferometry
Highly mountainous area
DEM
Accuracy assessment
Correction