| 近红外大气吸收波段太阳辐射计定标 |
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| 引用本文： | 伽丽丽,戴聪明,徐青山,魏合理.近红外大气吸收波段太阳辐射计定标[J].遥感学报,2012,16(5):928-938. |
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| 作者姓名： | 伽丽丽 戴聪明 徐青山 魏合理 |
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| 作者单位： | 中国科学院 安徽光学精密机械研究所 中国科学院大气成分与光学重点实验室,安徽 合肥 230031;中国科学院研究生院,北京 100049;中国科学院 安徽光学精密机械研究所 中国科学院大气成分与光学重点实验室,安徽 合肥 230031;中国科学院研究生院,北京 100049;中国科学院 安徽光学精密机械研究所 中国科学院大气成分与光学重点实验室,安徽 合肥 230031;中国科学院 安徽光学精密机械研究所 中国科学院大气成分与光学重点实验室,安徽 合肥 230031 |
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| 基金项目： | 国家自然科学基金项目(编号: 61077081) |
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| 摘 要： | 用通用大气辐射传输软件CART模拟了POM02太阳辐射计的1020nm、1627nm和2200nm等3个近红外通道的大气透过率特性。结果表明,前两通道处于大气非吸收波段,其透过率很好的遵从Beer-Lambert定律,而2200nm通道则有较强的吸收,吸收光学厚度随大气质量的变化服从指数分布,与Beer-Lambert定律有一定的偏差,其定标需采用改进的Langley法。通过选取好天的5个定标实例证明,采用改进的Langley法定标2200nm通道,可提高其透过率测量精度约3.8%。
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| 关 键 词： | 太阳辐射计定标 近红外 吸收波段 改进Langley法 |
| 收稿时间： | 2011/9/20 0:00:00 |
| 修稿时间： | 3/3/2012 12:00:00 AM |
Calibration of near-infrared absorption band for a sun-photometer |
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| QIE Lili,DAI Congming,XU Qingshan and WEI Heli.Calibration of near-infrared absorption band for a sun-photometer[J].Journal of Remote Sensing,2012,16(5):928-938. |
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| Authors: | QIE Lili DAI Congming XU Qingshan and WEI Heli |
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| Institution: | Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China;Graduate University Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China;Graduate University Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China |
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| Abstract: | The atmospheric transmittance properties for three near-infrared channels of POM02 skyradiometer at the wavelengths of 1020 nm, 1627 nm, and 2200 nm, were studied by using a combined atmospheric radiative transfer model (CART). Results showed that, the extinctions at the bands of 1020 nm, 1627 nm, which are located in atmospheric window channel, obeyed the Beer-Lambert law. For the 2200 nm channel located in an absorption band, the absorption exhibited an exponential distribution. Then these channels of POM02 skyradiometer were calibrated with traditional Langley method and modified Langley method, respectively. Two calibration methods were applied for four clear days. It proved that the accuracy of derived transmittance has been improved by 3.8% using modified Langley method to 2200 nm channel. |
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| Keywords: | Sun-photometer calibration near-infrared absorption band modif ied Langley method |
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