| 摘要: |
| 极化逆合成孔径雷达(Pol-ISAR)能够对非合作目标进行全天时全天候的高分辨成像观测,是获取空间目标信息的重要手段,但是复杂大气环境下的电波传播效应可能对成像结果造成重大影响。本文建立了全极化雷达在复杂降雨条件下的ISAR成像模型,分析了降雨环境下传输效应所导致的极化电磁波幅度衰减和相位误差,提出了传输效应对ISAR成像影响的修正方法,为多极化通道融合成像提供重要支撑。实验结果验证了复杂降雨条件下ISAR成像模型的正确性和传输效应修正方法的有效性。 |
| 关键词: 极化逆合成孔径雷达 复杂降雨 传输效应 幅相误差 |
| DOI： |
| 分类号:TN954；TN958.98 |
| 基金项目:国家自然科学(No.62231026) |
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| Study on the effect of rainfall on polarized radar ISAR imaging and calibration methods |
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李心达, 甘琳, 沈淳, 李健兵
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| Abstract: |
| Polarized inverse synthetic aperture radar (Pol-ISAR) is capable of all-weather, all-day and high-resolution imaging observation of non-cooperative targets, which is an important means of acquiring information about space targets, but the wave propagation effect under complex atmospheric environments may have a significant impact on the imaging results. This paper establishes the ISAR imaging model of fully polarized radar under complex rainfall conditions, analyzes the polarized electromagnetic wave amplitude attenuation and phase error caused by the transmission effect under rainfall environment, and proposes a method to calibrate the transmission effect on ISAR imaging, which provides an important support for the fusion imaging of the multipolar channels. The experimental results verify the correctness of the ISAR imaging model and the effectiveness of the transmission effect calibration method under complex rainfall conditions. |
| Key words: Polarized inverse synthetic aperture radar Complex rainfall Transmission effect Amplitude-phase error |