东亚洋面AMSR2 7.3 GHz观测中的射频干扰分析 下载: 1078次
Analysis of Radio Frequency Interference in AMSR2 7.3 GHz Channels over East Asian Ocean
1 南京信息工程大学气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室, 江苏 南京 210044
2 南京信息工程大学大气物理学院, 江苏 南京 210044
图 & 表
图 1. 广义RI指数检测方法检测水平极化下观测的RFI信号空间分布
Fig. 1. Spatial distribution of RFI signal observed under horizontal polarization with generalized RI index detection method
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图 2. 谱差法检测水平极化下观测的RFI信号的空间分布
Fig. 2. Spatial distribution of RFI signal observed under horizontal polarization with spectral difference method
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表 1AMSR2通道特征参数
Table1. AMSR2 channel characteristics
Center frequency /GHz | Polarization | Band width /MHz | Spatial resolution /km | Sensitivity /K |
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6.925 | H/V | 350 | 35×62 | 0.34 | 7.3 | H/V | 350 | 34×58 | 0.43 | 10.65 | H/V | 100 | 24×42 | 0.7 | 18.7 | H/V | 200 | 14×22 | 0.7 | 23.8 | H/V | 400 | 15×26 | 0.6 | 36.5 | H/V | 1000 | 7×12 | 0.7 | 89.0 | H/V | 3000 | 3×5 | 1.2 |
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表 2检测到RFI信号的像素数
Table2. Numbers of pixels of detected RFI signal
Date | 7 GHz V-pol | 7 GHz H-pol |
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Generalized RFIindex method | Spectrumdifference method | Generalized RFIindex method | Spectrumdifference method |
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1 | 962 | 500 | 548 | 299 | 2 | 1085 | 451 | 672 | 295 | 3 | 1168 | 552 | 820 | 474 | 4 | 839 | 422 | 659 | 305 | 5 | 1107 | 510 | 821 | 416 | 6 | 1264 | 559 | 1387 | 555 | 7 | 1182 | 547 | 954 | 351 | 8 | 1234 | 588 | 1517 | 501 | 9 | 988 | 418 | 886 | 273 | 10 | 1030 | 437 | 993 | 270 | 11 | 1102 | 436 | 946 | 325 | 12 | 1402 | 548 | 1494 | 601 | 13 | 1830 | 609 | 2567 | 1046 | 14 | 1756 | 598 | 1786 | 637 | 15 | 1471 | 620 | 1105 | 485 | 16 | 1051 | 486 | 562 | 250 |
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吴莹, 李美欣. 东亚洋面AMSR2 7.3 GHz观测中的射频干扰分析[J]. 激光与光电子学进展, 2020, 57(9): 092801. Ying Wu, Meixin Li. Analysis of Radio Frequency Interference in AMSR2 7.3 GHz Channels over East Asian Ocean[J]. Laser & Optoelectronics Progress, 2020, 57(9): 092801.