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FY-3C卫星紫外臭氧总量探测仪的在轨替代定标

On-board vicarious calibration of FY-3C UV total ozone unit

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摘要

风云三号气象卫星C星(FY-3C)搭载的紫外臭氧总量探测仪因太阳辐照度观测值异常而无法进行常规在轨星上定标, 导致臭氧总量产品无法正常生成。在研究了风云三号气象卫星B星(FY-3B)TOU辐照度观测数据的特点以及仪器衰减规律后, 结合FY-3C/TOU辐照度和辐亮度实测数据, 探索了基于晴空海洋像元观测值计算仪器的衰减系数法。本文选取受陆地气溶胶影响较小的热带太平洋海区, 用矢量辐射传输模式模拟云量较小的像元对应的晴空辐亮度, 比较观测值与模拟计算值, 通过统计筛选晴空像元, 估算FY-3C/TOU探测器随时间的衰减系数。在确定仪器衰减系数后对FY-3C/TOU历史数据进行处理, 反演获得了全球臭氧总量并与WMO/WOUDC地基观测数据进行对比。结果表明, 基于晴空辐亮度估算的仪器衰减系数进行的臭氧总量反演的均方根误差在5%以内。在星载紫外探测器星上辐射定标失败的时候, 可以利用晴空海洋像元确定仪器的定标系数。

Abstract

Previously, ozone products could not be generated due to the abnormal solar irradiance for a total ozone unit (TOU) on FY-3C, because the instrumental degradation coefficient could not be measured. After investigating the irradiation measurement data and degradation trends of FY-3B/TOU and combining this with FY-3C/TOU radiance and irradiance data, methods for calculating instrumental degradation coefficients were explored based on clear ocean pixel data. An area in the atmosphere above the Pacific Ocean was chosen as a representative “clean” atmospheric sample, which is an area without pollution, to calculate the radiation from the earth and the model radiation with a vector radiative transfer mode. By selecting clear pixels and comparing measured and modeled values, the FY-3C/TOU instrument degradation with time was evaluated. On comparing the new total ozone results with WMO/WOUDC data, it is found that the change in the satellite monitoring data over time and the site results agreed well. Further, the mean square error of the two results is within 5%. Thus, the clear-sky pixels method for FY-3C/TOU works well and has the potential to solve problems regarding in-orbit radiation calibrations.

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中图分类号:TP722.3;X87

DOI:10.3788/ope.20192702.0326

所属栏目:现代应用光学

基金项目:国家重点研发计划项目(No.2017YFC0209704); 国家科技部重点研发项目(No.2017YB0502800, No.2017YFB0502803)

收稿日期:2018-03-16

修改稿日期:2018-05-08

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作者单位    点击查看

张 卓:中国科学院 国家空间科学中心, 北京 100190中国科学院大学, 北京 100049国家空间科学中心 空间环境探测研究室, 北京100190天基空间环境探测北京市重点实验室, 北京 100190中国科学院 空间环境态势感知技术重点实验室, 北京 100190
王维和:国家气象局 卫星气象中心, 北京 100081
王后茂:中国科学院 国家空间科学中心, 北京 100190国家空间科学中心 空间环境探测研究室, 北京100190天基空间环境探测北京市重点实验室, 北京 100190中国科学院 空间环境态势感知技术重点实验室, 北京 100190
王咏梅:中国科学院 国家空间科学中心, 北京 100190国家空间科学中心 空间环境探测研究室, 北京100190天基空间环境探测北京市重点实验室, 北京 100190中国科学院 空间环境态势感知技术重点实验室, 北京 100190中国科学院大学 天文与空间科学学院, 北京 100049

联系人作者:张卓(zhangzhuo@mails.ucas.ac.cn)

备注:张 卓(1991-), 女, 吉林通化人, 博士研究生, 2013年于吉林大学物理学院获得学士学位, 主要从事吸收性气溶胶指数及紫外探测器在轨定标的研究。

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引用该论文

ZHANG Zhuo,WANG Wei-he,WANG Hou-mao,WANG Yong-mei. On-board vicarious calibration of FY-3C UV total ozone unit[J]. Optics and Precision Engineering, 2019, 27(2): 326-333

张 卓,王维和,王后茂,王咏梅. FY-3C卫星紫外臭氧总量探测仪的在轨替代定标[J]. 光学 精密工程, 2019, 27(2): 326-333

被引情况

【1】刘新明,李周,陈德明,蔡立华,王前学. 采用参考源法实现船舶红外辐射特性的测量. 激光与光电子学进展, 2019, 56(23): 230401--1

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