孙中昶,郭华东,李新武.机载双天线InSAR数据生成高精度DEM的误差分析[J].高技术通讯(中文),2012,22(2):171~179 |
机载双天线InSAR数据生成高精度DEM的误差分析 |
Error analysis of high precision DEM generated from airborne dual antenna interferometric SAR data |
修订日期:2010-05-25 |
DOI: |
中文关键词: 机载干涉合成孔径雷达, 双天线, 数字高程模型(DEM), 误差分析, 误差传播 |
英文关键词: airborne interferometric synthetic aperture radar, dual antenna, digital elevation model (DEM), error analysis, error propagation |
基金项目:863计划(2007AA120304,20101AA22202),973计划(2009CB723906)和中国科学院研究生科技创新(Y021003101A)资助项目 |
作者 | 单位 | 孙中昶 | 中国科学院对地观测与数字地球科学中心 | 郭华东 | 中国科学院对地观测与数字地球科学中心 | 李新武 | 中国科学院对地观测与数字地球科学中心 |
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中文摘要: |
结合机载双天线干涉合成孔径雷达(InSAR)正侧视成像模型,分析了机载双天线InSAR数据处理中存在的影响数字高程模型(DEM)高程精度和点位精度的主要因素,包括平台高度、斜距、干涉相位、基线长度、基线倾角、中心多普勒频率以及载机姿态,着重分析了平台高度、基线长度、基线倾角以及侧视角等因素的变化与DEM误差之间的关系。选用机载双天线InSAR数据进行了干涉实验,并对生成的DEM进行了误差分析,实验分析结果和误差定量分析的结果相一致。对机载双天线InSAR数据处理进行误差分析有利于提高DEM的高程和点位精度,也有利于机载双天线InSAR系统设计及飞行试验设计,因而具有重要实用意义。 |
英文摘要: |
Based on the bore sight imaging model of an airborne dual antenna interferometric synthetic aperture radar (InSAR), the paper analyses the main factors affecting the digital elevation model (DEM)’elevation error and point error in airborne dual antenna InSAR data processing, including the platform height, slant range, phase, baseline length, baseline angle, center Doppler frequency, and the carrier aircraft attitude, and emphatically investigates the influences of the platform height, baseline length, baseline angle, and the look angle on DEM errors. The airborne dual antenna X band InSAR data was used to conduct the interferometric experiment, and the DEM was obtained and its error analysis was performed. The experiment and the analysis show that the data processing results are consistent with the quantitative error analysis. It is concluded that the error analysis of airborne dual antenna InSAR data processing is great significance in practice because it can help to improve the DEM accuracy and help to design an airborne dual antenna InSAR system and its flight test. |
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