| 引用本文: | 张绪锦，桂少婷，张佳佳，牛 蕾. 一种双频星载InSAR高度计系统设计与仿真[J]. 雷达科学与技术, 2026, 24(2): 148-154.[点击复制] |
| ZHANG Xujin, GUI Shaoting, ZHANG Jiajia, NIU Lei. Design and Simulation of a Dual-Frequency Spaceborne InSAR Altimeter System[J]. Radar Science and Technology, 2026, 24(2): 148-154.[点击复制] |
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| 摘要: |
| 传统卫星雷达高度计采用一维测量工作体制，不能同时兼顾时间和空间分辨率。本文提出一种由Ku和Ka频段组成的近星下点小视角观测干涉合成孔径雷达（Interferometric Synthetic Aperture Radar, InSAR）测量系统，通过两个频段各自观测不同区域，然后将两个观测区域进行拼接得到大的观测幅宽。星载InSAR系统干涉基线的两端安装有共口径双频有源相控阵天线，可灵活调动天线波束指向。工作时序为每组两个脉冲，以交替发射信号和接收回波的方式分别观测卫星左侧或右侧区域。为避免双频段之间产生发射遮挡和相互干扰，两个频段采用相同的脉冲重复频率工作。计算机仿真和实际数据反演结果表明，本文所述方法可同时获得高精度海面高程和大的观测幅宽。 |
| 关键词: 双频段 雷达高度计 计算机仿真 观测幅宽 |
| DOI：DOI:10.3969/j.issn.1672-2337.2026.02.004 |
| 分类号:TN953 |
| 基金项目:山东省科技创新专项（2018SDKJ0102-3） |
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| Design and Simulation of a Dual-Frequency Spaceborne InSAR Altimeter System |
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ZHANG Xujin, GUI Shaoting, ZHANG Jiajia, NIU Lei
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The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China
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| Abstract: |
| Traditional satellite radar altimeters operate in a one-dimensional measurement mode, which cannot achieve high temporal and spatial resolution simultaneously. In this paper, a near-nadir small-field-of-view interferome-tric synthetic aperture radar （InSAR） measurement system composed of Ku and Ka bands is proposed. The two bands are used to observe different regions respectively, and then the two observation areas are spliced to obtain a large swath width.The spaceborne InSAR system is equipped with dual-frequency shared-aperture active phased array antennas at both ends of the interferometric baseline, which can flexibly adjust the antenna beam pointing. The operating sequence involves two pulses per group, alternately transmitting signals and receiving echoes to observe the areas on the left or right side of the satellite. To avoid transmission blocking and mutual interference between the two frequency bands, both bands work at the same pulse repetition frequency. The results of computer simulations and real data inversions demonstrate that the method described in this paper can obtain high-precision sea surface height and large observation swath width at the same time. |
| Key words: dual-frequency band radar altimeter computer simulation swath width |
