| CE318型太阳光度计标定方法初探 |
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| 引用本文： | 杨志峰,张小曳,车慧正,张晓春,胡秀清,张立军.CE318型太阳光度计标定方法初探[J].应用气象学报,2008,19(3):297-306. |
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| 作者姓名： | 杨志峰 张小曳 车慧正 张晓春 胡秀清 张立军 |
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| 作者单位： | 1.中国气象科学研究院 中国气象局大气成分观测与服务中心 中国气象局大气化学重点开放实验室, 北京 100081 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 初步探索了CE318型太阳光度计的室内和野外标定方法, 并对两种方法的标定结果进行对比。基于积分球辐射源的辐亮度标定方法, 对CE318型太阳光度计不同波段天空散射辐射通道进行标定实验; 分别采用Langley标定法和标准仪器相对标定方法, 对CE318型太阳光度计的不同波段太阳直接辐射通道进行了标定实验。实验结果显示:天空散射辐射通道的标定结果在670 nm, 870 nm和1020 nm波段与仪器出厂时给定的标定结果偏差不超过6%, 而440 nm波段处得到的标定结果要高于出厂时给定的结果, 偏离幅度约18.9%。太阳直接辐射各通道的标定结果普遍大于出厂时给定的结果, 说明滤光片老化较为严重, 需要进行更换, 以保证观测精度。由于标准仪器相对标定方法对太阳直接辐射通道的标定结果明显优于Langley法, 因此利用标准仪器相对标定方法对中国气象局太阳光度计站网仪器进行定期标定更能够保证仪器观测数据的准确性。
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| 关 键 词： | 太阳光度计 积分球辐射源标定法 Langley法 标准仪器相对标定法 大气气溶胶 |
| 收稿时间： | 2007-09-12 |
An Introductory Study on the Calibration of CE318 Sunphotometer |
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| Yang Zhifeng,Zhang Xiaoye,Che Huizheng,Zhang Xiaochun,Hu Xiuqing,Zhang Lijun.An Introductory Study on the Calibration of CE318 Sunphotometer[J].Quarterly Journal of Applied Meteorology,2008,19(3):297-306. |
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| Authors: | Yang Zhifeng Zhang Xiaoye Che Huizheng Zhang Xiaochun Hu Xiuqing Zhang Lijun |
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| Institution: | 1.Key Laboratory of Atmospheric Chemistry, Center for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences, Beijing 1000812.National Satellite Meteorological Center, Beijing 100081 |
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| Abstract: | The indoor and field calibration methods of CE318 sunphotometer are mainly explo
red and the calib
ration results of the two methods are compared. Based on integrating sphere radi
ation calibration method, an experiment is carried out for the calibration of th
e sky scattering radiation channels at eight different wave bands of CE318 sunph
otometer. Langley calibration method and standard instrument relative calibratio
n method are used to calibrate sun direct radiation channels at different wave b
ands of CE318 sunphotometer. The results of this experiment show that the calibr
ation results of sky scattering radiation channels at 670 nm, 870 nm, 1020 nm an
d the original calibration of the same instrument are fundamentally equal with t
he discrepancy less than 6%. It has high reliability. Unfortunately the result o
f the wave band of 440 nm is higher than the original calibration, and the depar
ture range is about 18.9%. Based on the calibration results, it can be concluded
that there are good feasibility and reliability in using integrating sphere for
calibrating the sky scattering radiation channels. However, there is a little d
i
fference between the calibration results and the original calibration. Consideri
ng the fact that aging filters might be led to by using conditions and measureme
nt for long periods outdoors, some aerosol particles may fall on the filters whi
ch are inside the sensor head, even because the filters run very long time, so t
he filters are made broken. Generally speaking, the calibration results of the s
un direct radiation channels are slightly larger than the original calibration.
The results show that the filters of some channels are aging, so it is necessary
to replace them to ensure observation precision. In addition, the comparisons b
etween the Langley method and standard instrument relative calibration method ar
e made. It shows from the comparison results that good weather conditions on the
day of calibration are required by the Langley method, which include clear sky,
cloud free and stable atmosphere, and very accurate standard instrument is req
u
ired by the standard instrument relative calibration method. Because the standar
d instrument relative calibration method is more advantageous than the Langley m
ethod from the comparing results, the standard instrument relative calibration m
ethod is employed by the present study to calibrate the CE318 sunphotometer in t
he CARSNET(China Aerosol Robot Sunphotometer NETwork) of China Meteorological Ad
ministration to guarantee the precision of the observation data. |
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| Keywords: | sunphotometer integrating sphere radiation calibration method Langley method standard instrument relative calibration method aerosol |
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