| 多波段光度计遥感气溶胶误差分析及订正 |
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| 引用本文： | 张军华,王美华,毛节泰.多波段光度计遥感气溶胶误差分析及订正[J].大气科学,2000,24(6):855-859. |
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| 作者姓名： | 张军华 王美华 毛节泰 |
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| 作者单位： | 北京大学地球物理系暴雨监测和预测国家重点实验室,北京 100871 |
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| 基金项目： | 国家自然科学基金资助项目49635200 |
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| 摘 要： | 结合1998年实际遥感气溶胶所用多波段光度计,详细分析了由于仪器定标、仪器视场角、滤光片宽度、气体吸收等方面带来的误差,并提出了相应的订正方法,特别是针对水汽的吸收,提出了三波段差分吸收订正法。结果表明,通过误差订正,遥感精度有很大提高,气溶胶光学厚度在0.1左右,相对误差不超过10%,中等大气浑浊度情况下相对误差2%左右。
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| 关 键 词： | 光度计 大气光学厚度 气溶胶 |
Error Analysis and Correction for Multi-Wavelength Sun-Photometer Aerosol Remote Sensing |
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| Zhang Junhu,Wang Meihua and Mao Jietai.Error Analysis and Correction for Multi-Wavelength Sun-Photometer Aerosol Remote Sensing[J].Chinese Journal of Atmospheric Sciences,2000,24(6):855-859. |
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| Authors: | Zhang Junhu Wang Meihua and Mao Jietai |
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| Abstract: | Error analysis and correction is applied to a specific multi-wavelength sun-photometer, which is used for aerosol remote sensing at four locations in China. The results show that instrument calibration, filter bandwidth, gas absorption, etc. can bring serious errors. Several methods are used to correct these kinds of errors, especially a" three band method" is put forward to reduce the errors brought by water vapor. After the correction, it is shown that the relative error is no larger than 10% for very clear condition and is about 2% for medium turbidity. |
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| Keywords: | photometer atmospheric optical thickness aerosol |
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