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。
Based on the bore-sight imaging model of an airborne dual-antenna interferometrie 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.
出处
《高技术通讯》
CAS
CSCD
北大核心
2012年第2期171-179,共9页
Chinese High Technology Letters
基金
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.
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
airborne interferometric synthetic aperture radar, dual-antenna, digital elevation model （DEM）,error analysis, error propagation
