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| 1 | High-precision deformation monitoring algorithm for GBSAR system: rail determination phase error compensation显示文摘In recent years, the repeat-pass GBSAR(ground based synthetic aperture radar) system has demonstrated its capacity to acquire deformation. Nevertheless, in a variety of applications, it needs to measure the deformation with the precision up to 0.1 mm, which could not be reached by utilizing the traditional PS(permanent scatterer) algorithm in most cases. Generally, one of the main reasons could be summarized into the phase error caused by the rail determination error, because the precision of rail determination might degrade during long working hours. However, the traditional PS algorithm could not compensate for the phase error caused by the rail determination error. In order to solve the problems, we modify the conventional PS algorithm.Firstly, we deduced the transformation relationship between the rail determination error and its corresponding interferometric phase error. Then, the phase errors caused by the atmosphere and the rail determination error were jointly compensated. The experimental data, which were obtained in Fangshan District in Beijing(China), were used to test and verify the performance of the new algorithm. After the comparison between the results processed by the new algorithm and those processed by the traditional algorithm, the proposed method demonstrated its ability to obtain high-precision deformation. | Cheng HU Mao ZHU Tao ZENG Weiming TIAN Cong MAO | 2016 | Science China(Information Sciences)2016，59，8： | 9 |
| 2 | Feasibility study of inclined geosynchronous SAR focusing using Beidou IGSO signals显示文摘Dear editor,Geosynchronous synthetic aperture radar(GEO SAR)[1,2]has an inclined geosynchronous orbit of around 36000 km,which leads to its short revisit time of around 24 hours and a wide coverage of up to approximately one third of the Earth surface.Its long integration time guarantees the fine resolution.Thus,GEO SAR owns the promising capability of providing images with the high resolution, | Xichao DONG Cheng HU Weiming TIAN Tian ZHANG Yuanhao LI | 2016 | Science China Earth Sciences2016，59，12： | 5 |
| 3 | GNSS-R形变监测技术综述显示文摘利用全球导航卫星系统反射(Global Navigation Satellite Systems-Reflectometry,GNSS-R)测量对地球表面进行形变监测是一种新型遥感技术,拓展了导航系统的应用范围。介绍了GNSS-R遥感研究的现状,为形变监测提供了技术基础;介绍了GNSS-R形变监测技术的优势,着重对三种典型方法:基于成像、基于镜反射和基于目标探测的形变监测方法进行了详细分析和比较,提出了未来GNSS-R形变监测技术需要克服的挑战,展望了未来的发展趋势。 | 严颂华 唐凤雨 陈永谦 李焱 | 2021 | 无线电工程2021，51，10： | 5 |
| 4 | 基于导航卫星的干涉SAR数据采集策略优选方法分析显示文摘基于导航卫星的干涉SAR(GNSS-InSAR)使用在轨导航卫星作为照射源,近地面部署接收机,利用导航卫星的星座特性以及重轨特性,可实现区域性的连续观测。对于场景1维/3维形变反演而言,需要连续时间的数据采集,由于导航卫星并非严格意义上的重轨,且重轨时间具有不确定性,原始数据冗余度高,数据对齐时截取量大,数据有效性低。该文针对GNSS-InSAR场景数据采集时间精确性问题,提出了一种重轨数据采集优化模型,该方法通过实际轨迹与TLE预测轨迹相结合的方式,通过空间相干系数的滑窗轨迹对齐,以获取相邻天导航卫星重轨时间间隔,实现精确的GNSS-InSAR数据采集,在降低原始数据冗余度下,保证数据的有效合成孔径时间。实测数据表明所提方法的有效性。 | 张凌志 刘飞峰 胡程 | 2019 | 雷达学报(中英文)2019，8，5： | 2 |
| 5 | 地基GNSS-R公路边坡形变监测实验及误差分析显示文摘目前,使用全球卫星导航系统反射测量技术进行形变监测存在未进行真实坡面实验、未分析卫星运动影响和未探究接收天线位置偏移对形变监测结果的影响等问题。针对实际公路边坡进行形变监测,分析了卫星运动和反射信号接收天线位置偏移两种因素对形变反演精度的影响,提出一种同时适用于中圆地球轨道(medium earth orbit,MEO)卫星运动和倾斜地球同步轨道(inclined geosynchronous orbit,IGSO)卫星微小位置偏差的校正方法。接收天线位置偏移情况下的形变监测实验结果表明,通过运动卫星校正,利用MEO卫星对28.0 cm和11.7 cm位移的形变反演误差分别低至1.97 cm和0.56 cm,相较于校正前误差分别减小3.03 cm和2.70 cm;通过接收天线位置偏移实验,得出当天线位置偏移镜面反射线分别处于垂直方向约±6°和水平方向约±5°范围内时,不会对形变估测与反演结果造成大的影响。 | 严颂华 梅捷 陈永谦 陈璨 | 2024 | 武汉大学学报(信息科学版)2024，49，1： | 1 |
| 6 | 基于GNSS的前视双基SAR点扩散函数产生算法显示文摘基于GNSS的前视双基SAR系统(GNSS based Bistatic Forward Looking Synthetic Aperture Radar,GNSS-BFLSAR)是一类特殊构型的被动式双基SAR系统。该系统采用GNSS作为发射机,接收机部署在飞机上,飞机沿直线飞行,成像目标在飞机前方。GNSS-BFLSAR系统拥有部署成本低、安全性好等优势,在自主着陆、自主导航、战场地形获取等方面有着广阔的应用前景。对GNSS-BFLSAR系统的点扩散函数产生方法进行了研究,进一步仿真验证了所提方法的正确性。 | 刘文超 曾张帆 史智明 周艳玲 潘永才 | 2018 | 科技与创新2018，，5： | 0 |
| 7 | 外辐射源多通道前视SAR接收机系统设计与实现显示文摘外辐射源多通道前视双基地SAR作为一种新体制观测系统,具有构型设计灵活、前视成像幅宽大、目标区域信噪比高、隐蔽性强、成本低、部署便捷等显著优势。为了拓展外辐射源多通道前视双基地SAR的应用实践,本文设计了一种新型小型化外辐射源多通道前视双基地SAR接收机系统,可部署于地面和小型无人机上,并完成了原理样机的整机集成和调试,在实验室环境下输入频率步进的单频点信号进行测试,并进行了实测场景成像实验,验证了系统设计的正确性和实用性。 | 王承昊 刘飞峰 王战泽 徐智祥 | 2022 | 信号处理2022，38，1： | 0 |
| 8 | 导航卫星双基地SAR几何优选及实测边坡成像显示文摘基于导航卫星的星-地双基地SAR(GNSS-BSAR)作为一种新型的地表观测手段,具有重访时间短、覆盖范围广、系统成本低等显著优势。当地面接收机与目标场景距离较近时,由于GNSS-BSAR的分辨率较低,导致目标场景的成像结果与其在同一等距离线上的镜像混叠在一起,无法进行图像解译和形变反演处理。针对以上问题,本文提出了一种基于分辨率设计和等距离多普勒特性分析的导航卫星双基地SAR几何优选方法。该方法在选定实验场景的基础上,进行GNSS-BSAR分辨性能与等距离-多普勒特性的多目标联合优化,选定能够避免镜像模糊现象的导航卫星辐射源,实现GNSS-BSAR几何构型优选。基于以上方法,在重庆边坡地区设计GNSS-BSAR实验,成功获取了无镜像模糊的实测边坡成像结果,验证了几何优选方法的有效性。 | 王承昊 王战泽 刘飞峰 胡程 曾涛 | 2021 | 信号处理2021，37，7： | 0 |
| 9 | Recent progress in Bistatic SAR with illuminators of opportunity显示文摘Bistatic SAR(Bi SAR)with illuminators of opportunity is a kind of flexible SAR system that consists of non-cooperative transmitters and a stationary or moving receiver,as Figure 1shows.In recent years,notable efforts have been made to promote the development of this kind of system.Progress regarding Bi SAR with navigation satellites as transmitters before 2015,including the related theory and practice,has been well reviewed by Antoniou et al.and can be referred from[1].This paper reviews some of the progress in 2015and 2016,including novel signal processing approaches,advanced Bi SAR system configurations and | ZENG Tao ZHANG Tian TIAN Wei Ming HU Cheng | 2016 | Science China(Technological Sciences)2016，59，12： | 0 |
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