| 利用FY-1D极轨气象卫星分裂窗区通道计算陆表温度 |
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| 引用本文： | 吴晓,陈维英.利用FY-1D极轨气象卫星分裂窗区通道计算陆表温度[J].应用气象学报,2005,16(1):45-53. |
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| 作者姓名： | 吴晓 陈维英 |
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| 作者单位： | 国家卫星气象中心, 北京 100081 |
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| 摘 要： | 根据理论和经验上已证明的地表温度与AVHRR窗区通道4、5的亮度温度存在线性或非线性关系, 通过对2818条全球晴空大气廓线做不同比辐射率地表的FY-1D窗区通道4、5辐射率的模拟计算, 推导出FY-1D极轨气象卫星的红外通道4、5亮温与地表温度的二次回归关系式。同时详细介绍了由这一回归关系式和FY-1D高分辨率图像传输 (HRPT) 遥测数据计算陆表温度的方法, 最后给出陆表温度计算结果的精度:用中国地面气象台站的0 cm地温观测数据与相同时刻的分辨率为0.01°×0.01°经纬度的卫星陆表温度相对比, 两者非常吻合, 绝大部分台站|ΔT|＜3.0 K。
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| 关 键 词： | 陆表温度 极轨气象卫星 亮温 AVHRR窗区 |
| 收稿时间： | 2003-10-08 |
| 修稿时间： | 2003年10月8日 |
Land Surface Temperature Estimated by Remote Sensing Data from FY-1D Polar Meteorological Satellite |
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| Wu Xiao,Chen Weiying.Land Surface Temperature Estimated by Remote Sensing Data from FY-1D Polar Meteorological Satellite[J].Quarterly Journal of Applied Meteorology,2005,16(1):45-53. |
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| Authors: | Wu Xiao Chen Weiying |
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| Affiliation: | National Satellite Meteorological Center, Beijing 100081 |
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| Abstract: | The split window method was widely used to retrieve the land surface temperature (LST) from satellite remote sensing data in the 1980s and the 1990s. The scientists demonstrated theoretically or statistically that there exists a linear or non-linear relationship between the LST and AVHRR channel 4,5 brightness temperatures. 2818 clear sky radiosonde profiles were used to simulate the FY-1D HRPT channel 4, 5 brightness temperatures for different ground emissivities. The derived non-linear regression equation for each ground type is:T LS =T 4 A(T 4-T 5) B(T 4-T 5) 2 D. Meanwhile, the calculating method of LST by using FY-1D HRPT data and the regression equation were described. Finally, the accuracy of the calculated LST in main land of China was given: compared with the 0 cm soil temperatures observed by Chinese meteorological ground stations, the LSTs calculated by FY-1D data are very co-ordinate with the station observations. For most ground stations, the deviations between the satellite LST and stations observations are less than 3.0 K. |
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| Keywords: | Land Surface Temperature (LST) Polar meteorological satellite Brightness temperature AVHRR window |
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