摘要
顺轨干涉-合成孔径雷达(ATI-SAR)能够利用多普勒信息对宽幅场景径向速度进行测量,然而目前既有的顺轨干涉性能分析主要是针对两组单通道数据实现误差分解,并没有考虑距离向数字波束合成-合成孔径雷达(DBF-SAR)。为实现面向高分宽幅应用的顺轨干涉测速应用,分析在毫米波频段收发天线轻量化、集成化优势下的毫米波距离向多通道合成SAR顺轨干涉系统,评估通道间相位误差、波达角估计误差等因素对干涉相位相干性的影响。结果表明:在一定的弱散射场景下,在Ka频段实现的DBF技术能够利用较少的通道数有效改善测速性能,为后续的多通道顺轨干涉数据分析提供定量化参考。
Along-track interferometric synthetic aperture radar(ATI-SAR)can use Doppler information to measure the radial velocity of a wide scene.However,the current performance analysis of ATI-SAR mainly implements error decomposition for two sets of single-channel data,and does not consider digital beam forming synthetic aperture radar(DBF-SAR)in range.In order to realize the along-track interferometric speed measurement application for high-resolution and wide-swath applications,the millimeter wave multi-channel integrated SAR alongtrack interferometric speed measurement system with the advantages of lightweight and transceiver antennas in the millimeter wave frequency band is analyzed,and the phase error,direction of arrival estimation error and other factors on the interferometric coherence coefficient are evaluated.The results show that the DBF technology implemented in the Ka band for low-backscattering scenes can effectively improve the speed measurement performance by adopting a small number of channels,and provide a quantitative reference for subsequent multi-channel ATI data analysis.
作者
吴思利
王辉
郑世超
曾朝阳
陈翔
孙家正
冯利鹏
WU Sili;WANG Hui;ZHENG Shichao;ZENG Zhaoyang;CHEN Xiang;SUN Jiazheng;FENG Lipeng(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2021年第1期72-79,共8页
Aerospace Shanghai（Chinese&English）
关键词
合成孔径雷达
测速
多通道合成
干涉
顺轨干涉
synthetic aperture radar
velocity measurement
digital beam forming
interferometry
along track interferometry
