| 基于一维综合孔径微波辐射计的海面温度反演研究 |
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| 引用本文： | 艾未华,冯梦延,陈冠宇,陆文.基于一维综合孔径微波辐射计的海面温度反演研究[J].海洋学报(英文版),2020,42(5):115-122. |
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| 作者姓名： | 艾未华 冯梦延 陈冠宇 陆文 |
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| 作者单位： | 国防科技大学气象海洋学院, 南京, 211101;中国人民解放军32033部队, 海口, 570100 |
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| 摘 要： | Due to the low spatial resolution of sea surface temperature(T_S) retrieval by real aperture microwave radiometers,in this study, an iterative retrieval method that minimizes the differences between brightness temperature(T_B)measured and modeled was used to retrieve sea surface temperature with a one-dimensional synthetic aperture microwave radiometer, temporarily named 1 D-SAMR. Regarding the configuration of the radiometer, an angular resolution of 0.43° was reached by theoretical calculation. Experiments on sea surface temperature retrieval were carried out with ideal parameters; the results show that the main factors affecting the retrieval accuracy of sea surface temperature are the accuracy of radiometer calibration and the precision of auxiliary geophysical parameters. In the case of no auxiliary parameter errors, the greatest error in retrieved sea surface temperature is obtained at low T_S scene(i.e., 0.710 6 K for the incidence angle of 35° under the radiometer calibration accuracy of0.5 K). While errors on auxiliary parameters are assumed to follow a Gaussian distribution, the greatest error on retrieved sea surface temperature was 1.330 5 K at an incidence angle of 65° in poorly known sea surface wind speed(W)(the error on W of 1.0 m/s) over high W scene, for the radiometer calibration accuracy of 0.5 K.
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| 关 键 词： | 海面温度 综合孔径微波辐射计 反演精度 定标精度 辅助参数误差 高空间分辨率 |
| 收稿时间： | 2019/3/19 0:00:00 |
Research on sea surface temperature retrieval by the one-dimensional synthetic aperture microwave radiometer, 1D-SAMR |
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| Ai Weihu,Feng Mengyan,Chen Guanyu,Lu Wen.Research on sea surface temperature retrieval by the one-dimensional synthetic aperture microwave radiometer, 1D-SAMR[J].Acta Oceanologica Sinica,2020,42(5):115-122. |
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| Authors: | Ai Weihu Feng Mengyan Chen Guanyu Lu Wen |
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| Institution: | 1.College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China2.PLA Troop 32033, Haikou 570100, China |
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| Abstract: | Due to the low spatial resolution of sea surface temperature (TS) retrieval by real aperture microwave radiometers, in this study, an iterative retrieval method that minimizes the differences between brightness temperature (TB) measured and modeled was used to retrieve sea surface temperature with a one-dimensional synthetic aperture microwave radiometer, temporarily named 1D-SAMR. Regarding the configuration of the radiometer, an angular resolution of 0.43° was reached by theoretical calculation. Experiments on sea surface temperature retrieval were carried out with ideal parameters; the results show that the main factors affecting the retrieval accuracy of sea surface temperature are the accuracy of radiometer calibration and the precision of auxiliary geophysical parameters. In the case of no auxiliary parameter errors, the greatest error in retrieved sea surface temperature is obtained at low TS scene (i.e., 0.710 6 K for the incidence angle of 35° under the radiometer calibration accuracy of 0.5 K). While errors on auxiliary parameters are assumed to follow a Gaussian distribution, the greatest error on retrieved sea surface temperature was 1.330 5 K at an incidence angle of 65° in poorly known sea surface wind speed (W) (the error on W of 1.0 m/s) over high W scene, for the radiometer calibration accuracy of 0.5 K. |
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| Keywords: | sea surface temperature synthetic aperture microwave radiometer retrieval accuracy radiometer calibration accuracy auxiliary parameter errors high spatial resolution |
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