FY-3A/TOU与Metop-B/GOME-2在轨交叉定标检验分析
Check Analysis of In-Orbit Cross-Calibration Between FY-3A/TOU and Metop-B/GOME-2
查看参考文献23篇
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文摘
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FY-3A气象卫星上搭载的紫外臭氧总量探测仪(TOU)是我国首台自主研制的用于日常全球臭氧总量监测的仪器,自2008年5月发射至2015年3月已成功在轨运行近7年。前期研究表明FY-3A/TOU仪器辐射响应存在分段差异特征[辐射值大于和小于6.6μW/(cm~2·nm·sr)的仪器响应明显不同],存在双线性响应问题。提出了基于欧洲Metop-B卫星上全球臭氧监测实验2(GOME-2)的探测数据开展紫外波段在轨交叉定标研究方法,进行FY-3A/TOU L1B数据的在轨交叉定标检验,用于仪器探测值在轨实时比较和校正。2013年2月-2015年2月两年定标结果表明,2013年8月以前的辐射值比对斜率均为1左右,表明TOU的探测值在2013年8月以前比较准确,随后TOU与GOME-2的比对斜率开始偏大,TOU探测值相对偏高,表明FY-3A/TOU仪器的探测响应发生变化。虽然比对斜率有变化,但两者的探测辐射值一直保持较好的线性相关性(R~2>0.96),因此可以通过交叉定标对TOU后期的探测数据进行校正。 |
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其他语种文摘
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Ultraviolet total ozone unit(TOU)is one of the main payloads on FY-3Ameteorological satellite and the first instrument for daily global coverage of total ozone monitoring is independently designed and manufactured by China.It has been in-orbit for almost seven years from May 2008to March 2015.The preliminary study shows that the radiation response FY-3A/TOU instrument is different for different spectrum bands [the response of the instrument with radiance larger than 6.6μW/(cm~2·nm·sr)is obviously different from the instrument with radiance less than 6.6μW/(cm~2·nm·sr)].It has the problem of bilinear response.A method is introduced for ultraviolet band in-orbit cross-calibration based on the data detected by global ozone monitoring experiment 2 (GOME-2)on European Metop-B satellite.The data of FY-3A/TOU L1Bare checked by in-orbit cross-calibration, and then the rea-time comparisons and corrections of instruments'detection values are made.The calibration results chosen from February 2013to February 2015indicate that the comparison slopes of radiation are all very close to 1 before August 2013,which mean that the detected radiance of TOU is fairly accurate.However,the slopes become a little larger after August 2013,the detected radiance of TOU is relatively larger than GOME-2,which means that the detected response FY-3A/TOU is changed.Although the equation slopes are variant,the relation coefficient between TOU and GOME-2keeps better linear dependence(R~2>0.96).It means that the later measurements of TOU can be corrected by use of cross-calibration equation. |
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来源
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光学学报
,2017,37(1):0128003-1-0128003-9 【核心库】
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DOI
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10.3788/AOS201737.0128003
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关键词
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遥感
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大气散射
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在轨交叉定标
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臭氧探测
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臭氧总量探测仪
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地址
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1.
中国科学院国家空间科学中心环境探测室, 北京, 100190
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上海卫星工程研究所载荷室, 上海, 201109
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中国气象局国家卫星气象中心, 北京, 100081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2239 |
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学科
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大气科学(气象学) |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:5918379
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