基于毫米波多基线InSAR的雷达测绘技术

李军 王冠勇 韦立登 鲁耀兵 胡庆荣

李军, 王冠勇, 韦立登, 等. 基于毫米波多基线InSAR的雷达测绘技术[J]. 雷达学报, 2019, 8(6): 820–830. doi: 10.12000/JR19098
引用本文: 李军, 王冠勇, 韦立登, 等. 基于毫米波多基线InSAR的雷达测绘技术[J]. 雷达学报, 2019, 8(6): 820–830. doi: 10.12000/JR19098
LI Jun, WANG Guanyong, WEI Lideng, et al. Radar mapping technology based on millimeter-wave multi-baseline InSAR[J]. Journal of Radars, 2019, 8(6): 820–830. doi: 10.12000/JR19098
Citation: LI Jun, WANG Guanyong, WEI Lideng, et al. Radar mapping technology based on millimeter-wave multi-baseline InSAR[J]. Journal of Radars, 2019, 8(6): 820–830. doi: 10.12000/JR19098

基于毫米波多基线InSAR的雷达测绘技术

doi: 10.12000/JR19098
基金项目: 高分辨率对地观测系统重大专项工程
详细信息
    作者简介:

    李军:李 军(1982–),男,北京无线电测量研究所研究员,博士,毕业于西安电子科技大学,研究方向为SAR系统总体及数据处理技术。E-mail: lijun_sar@sina.com

    王冠勇(1989–),男,北京无线电测量研究所工程师,博士,毕业于中国航天科工集团第二研究院,研究方向为SAR数据处理技术。E-mail: gywang.sar@gmail.com

    韦立登(1973–),男,北京无线电测量研究所研究员,博士,毕业于中国科学院研究生院,研究方向为机载SAR成像与InSAR处理技术。E-mail: koridge@163.com

    鲁耀兵(1965–),男,北京无线电测量研究所研究员,博士生导师,研究方向为雷达系统总体设计、雷达信号处理技术等。E-mail: luyaobing65@163.com

    胡庆荣(1974–),男,北京无线电测量研究所研究员,博士生导师,研究方向为雷达系统总体与机载SAR成像处理技术等。E-mail: hu_qingrong@126.com

    通讯作者:

    李军 lijun_sar@sina.com

  • 中图分类号: TN957.52

Radar Mapping Technology Based on Millimeter-wave Multi-baseline InSAR

Funds: The Major Project of High Resolution Earth Observation System
More Information
  • 摘要: 机载毫米波InSAR具备不受光照限制、测绘幅宽大、测绘精度高的特点,近年来随着其技术的不断发展和完善,逐渐成为一种被广泛关注的测绘手段。在针对小型飞行平台的高精度毫米波InSAR系统设计中,InSAR基线构型、多基线配置、外部数字高程模型(DEM)参考及InSAR处理流程是系统设计的核心。该文分析了机载毫米波InSAR系统中基线参数对干涉高程测量的影响,提出基于一体化天线吊舱的毫米波多基线InSAR系统设计思路,在此基础上提出基于时域成像算法的毫米波多基线InSAR测高处理流程。最后,实测数据实验验证了该文给出的机载毫米波多基线InSAR系统及其干涉数据处理方法在大比例尺测绘任务中的可行性和有效性。

     

  • 图  1  InSAR天线吊舱不同结构配置对比示意图

    Figure  1.  A comparison diagram of different configurations of InSAR antenna pod

    图  2  基于BP成像的InSAR测高模型

    Figure  2.  InSAR height measurement model based on BP imaging

    图  3  长短基线InSAR的地距投影误差对比

    Figure  3.  Comparison of ground distance projection errors of InSAR with long and short baselines

    图  4  毫米波多基线InSAR数据处理流程图

    Figure  4.  Flowchart of millimeter-wave multi-baseline InSAR data processing

    图  5  毫米波多基线InSAR装机及天线结构图

    Figure  5.  Millimeter wave multi-baseline InSAR installation and antenna structure diagram

    图  6  毫米波多基线InSAR实测数据处理结果

    Figure  6.  The measured data processing results of millimeter-wave multi-baseline InSAR

    图  7  毫米波多基线InSAR处理结果

    Figure  7.  Results of millimeter-wave multi-baseline InSAR treatment

    图  8  InSAR测绘高度与基准高度对比结果

    Figure  8.  Comparison results between the measured height and the reference height

    表  1  不同基线配置对InSAR高程测量精度影响对比

    Table  1.   Comparison of effects of different baseline configurations on InSAR elevation measurement accuracy

    飞行高度(m)基线误差(mm)基线长度(m)基线倾角(°)下视角(°)雷达斜距(km)高程误差(m)
    30000.11.845303.460.03
    454.240
    606.000.08
    0.345303.460.15
    454.240
    606.000.46
    下载: 导出CSV

    表  2  InSAR不同基线长度对应的模糊高程

    Table  2.   Fuzzy elevation corresponding to different baseline lengths

    基线长度(m)下视角(°)基线倾角(°)雷达斜距(m)模糊高程(m)
    0.303545520061
    0.3055458800125
    0.0335455200611
    0.03554588001247
    下载: 导出CSV

    表  3  毫米波多基线InSAR系统参数

    Table  3.   Parameters of millimeter-wave multi-baseline InSAR system

    参数数值
    中心频率35 GHz
    长基线长度0.31 m
    短基线长度0.03 m
    基线倾角45°
    飞行高度3000 m
    信号带宽900 MHz
    雷达下视角38°~52°
    平均飞行速度240 km/h
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-11-19
  • 修回日期:  2019-12-25
  • 网络出版日期:  2020-01-06
  • 刊出日期:  2019-12-01

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