FY-3C卫星紫外臭氧总量探测仪的在轨替代定标
|
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。
Previously,ozone products could not be generated due to the abnormal solar irradiance for a total ozone unit(TOU)on FY-3 C,because the instrumental degradation coefficient could not be measured.After investigating the irradiation measurement data and degradation trends of FY-3 B/TOU and combining this with FY-3 C/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-3 C/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-3 C/TOU works well and has the potential to solve problems regarding in-orbit radiation calibrations.
Previously,ozone products could not be generated due to the abnormal solar irradiance for a total ozone unit(TOU)on FY-3 C,because the instrumental degradation coefficient could not be measured.After investigating the irradiation measurement data and degradation trends of FY-3 B/TOU and combining this with FY-3 C/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-3 C/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-3 C/TOU works well and has the potential to solve problems regarding in-orbit radiation calibrations.
引文
[1]ZHANG P,YANG J,DONG C,et al..General introduction on payloads,ground segment and data application of Fengyun 3A[J].Frontiers of Earth Science in China,2009,3(3):367-373.
[2]DONG C,YANG J,YANG Z,et al..An overview of a new Chinese weather satellite FY-3A[J].Bulletin of the American Meteorological Society,2009,90(10):1531-1544.
[3]YANG Z,LU N,SHI J,et al..Overview of FY-3payload and ground application system[J].IEEETransactions on Geoscience and Remote Sensing,2012,50(12):4846-4853.
[4]YANG J,ZHANG P,LU N,et al..Improvements on global meteorological observations from the current Fengyun 3satellites and beyond[J].International Journal of Digital Earth,2012b,5(3):251-265.
[5]安大伟,窦芳丽,张鹏.基于FY-3C星微波成像仪毫米波通道的海面大风算法研究[J].上海航天,2017,34(4):38-42.AN D W,DOU F L,ZHANG P.Study on ocean surface wind speed algorithm based on FY-3C microwave imager millimeter band[J].Aerospace Shanghai,2017,34(4):38-42.(in Chinese)
[6]王功雪,蒋玲梅,武胜利,等.Fy-3b与FY-3c/mwri交叉定标及雪深算法应用[J].遥感技术与应用,2017,32(1):49-56.WANG G X.JIANG L M,WU S L,et al..Intercalibrating FY-3Band FY-3C/MWRI for synergistic implementing to snow depth retrieval algorithm[J].Remote Sensing Technology and Application,2017,32(1):49-56.(in Chinese)
[7]WANG W H,ZHANG X Y,AN X Q,et al..A-nalysis for retrieval and validation results of FY-3Total Ozone Unit(TOU)[J].Chinese Science Bulletin,2010,55(26):3037-3043.
[8]WANG W,ZHANG X,WANG Y,et al..Introduction to the FY-3ATotal Ozone Unit:instrument,performance and results[J].International journal of remote sensing,2011,32(17):4749-4758.
[9]WANG W,FLYNN L,ZHANG X,et al..Crosscalibration of the Total Ozone Unit(TOU)with the Ozone Monitoring Instrument(OMI)and SBUV/2for environmental applications[J].IEEE Transactions on Geoscience and Remote Sensing,2012,50(12):4943-4955.
[10]WANG Y M.WANG Y J.WANG W.et al..FY-3satellite ultraviolet total ozone unit[J]Chinese Science Bulletin,2010,55(1):84-89.
[11]王后茂,赵其昌,王咏梅,等.FY-3A/TOU与Metop-B/GOME-2在轨交叉定标检验分析[J].光学学报,2017(1):312-320.WANG H M,ZHAO Q C,WANG Y M,et al..Check analysis of in-orbit cross-calibration between FY-3A/TOU and Metop-B/GOME-2[J].Acta Optica Sinica,2017(1):312-320.(in Chinese)
[12]赵富强,王维和,邓小波,等.大气臭氧总量与吸收性气溶胶指数的关系[J].遥感学报,2017,21(4):500-508ZHAO F Q,WANG W H,DENG X B,et al..The relationship between absorbing aerosol index and zone and the effect of ozone uncertainty on the retrieval of aerosol index[J].Journal of Remote Sensing,2017,21(4):500-508.(in Chinese)
[13]HEALTH D F,KRUEGER A J,ROEDER H A,et al..The solar backscatter ultraviolet and total ozone mapping spectrometer/SBUV/TOMS/for nimbus G[J].Optical Engineering,1975,14(4):323-331.
[14]HERMAN J R,CELARIER E A.Earth surface reflectivity climatology at 340-380 nm from TOMS data[J].Journal of Geophysical Research:Atmospheres(1984-2012),1997,102(D23):28003-28011.
[15]FOWLER W K,NELSON V W.Performance of various diffuser materials in the absolute radiometric calibration of the SBUV-2[J].Metrologia,1993,30(4):255.
[16]HILAWNEATH E,HERZIG H H,WILLIAMSD E,et al..Effects of Space Shuttle flight on the reflectance characteristics of diffusers in the nearinfrared,visible,and ultraviolet regions[J].Optical Engineering,1994,33(11):3675-3682.
[17]Environment and Climate Change Canada,Toronto(n.d.).World meteorological organization-global atmosphere watch program(WMO-GAW)/World Ozone and Ultraviolet Radiation Data Centre(WOUDC)[Z/OL].https://woudc.org.[2017-09-06],[2018-03-07].
[18]刘成保,王维和,杨磊.FY-3C/臭氧总量探测仪太阳辐照度偏差的修正[J].光学精密工程,2015,23(7):1859-1866.LIU CH B,WANG W H,YANG L.Revision of solar irradiance of FY-3C/TOU[J].Opt.Precision Eng.,2015,23(7):1859-1866.(in Chinese)
[19]KLEIPOOL Q L,DOBBER M R,DE HAAN J F,et al..Earth surface reflectance climatology from 3years of OMI data[J].Journal of Geophysical Research:Atmospheres(1984-2012),2008,113(D18).
[20]HERMAN J R,KROTKOV N,CELARIER E,et al..Distribution of UV radiation at the Earths surface from TOMS-measured UV-backscattered radiances[J].Journal of Geophysical Research,1999,104(D10):12059-12076.
[21]DAVE J V.Meaning of successive iteration of the auxiliary equation in the theory of radiative transfer[J].Astrophysical Journal,1964,140(3):1292.
[22]EGCHI N,YOKOTA T.Investigation of clearsky occurrence rate estimated from CALIOP and MODIS observations[J].Geophysical Research Letters,2008,35(23):1128-1137.
[2]DONG C,YANG J,YANG Z,et al..An overview of a new Chinese weather satellite FY-3A[J].Bulletin of the American Meteorological Society,2009,90(10):1531-1544.
[3]YANG Z,LU N,SHI J,et al..Overview of FY-3payload and ground application system[J].IEEETransactions on Geoscience and Remote Sensing,2012,50(12):4846-4853.
[4]YANG J,ZHANG P,LU N,et al..Improvements on global meteorological observations from the current Fengyun 3satellites and beyond[J].International Journal of Digital Earth,2012b,5(3):251-265.
[5]安大伟,窦芳丽,张鹏.基于FY-3C星微波成像仪毫米波通道的海面大风算法研究[J].上海航天,2017,34(4):38-42.AN D W,DOU F L,ZHANG P.Study on ocean surface wind speed algorithm based on FY-3C microwave imager millimeter band[J].Aerospace Shanghai,2017,34(4):38-42.(in Chinese)
[6]王功雪,蒋玲梅,武胜利,等.Fy-3b与FY-3c/mwri交叉定标及雪深算法应用[J].遥感技术与应用,2017,32(1):49-56.WANG G X.JIANG L M,WU S L,et al..Intercalibrating FY-3Band FY-3C/MWRI for synergistic implementing to snow depth retrieval algorithm[J].Remote Sensing Technology and Application,2017,32(1):49-56.(in Chinese)
[7]WANG W H,ZHANG X Y,AN X Q,et al..A-nalysis for retrieval and validation results of FY-3Total Ozone Unit(TOU)[J].Chinese Science Bulletin,2010,55(26):3037-3043.
[8]WANG W,ZHANG X,WANG Y,et al..Introduction to the FY-3ATotal Ozone Unit:instrument,performance and results[J].International journal of remote sensing,2011,32(17):4749-4758.
[9]WANG W,FLYNN L,ZHANG X,et al..Crosscalibration of the Total Ozone Unit(TOU)with the Ozone Monitoring Instrument(OMI)and SBUV/2for environmental applications[J].IEEE Transactions on Geoscience and Remote Sensing,2012,50(12):4943-4955.
[10]WANG Y M.WANG Y J.WANG W.et al..FY-3satellite ultraviolet total ozone unit[J]Chinese Science Bulletin,2010,55(1):84-89.
[11]王后茂,赵其昌,王咏梅,等.FY-3A/TOU与Metop-B/GOME-2在轨交叉定标检验分析[J].光学学报,2017(1):312-320.WANG H M,ZHAO Q C,WANG Y M,et al..Check analysis of in-orbit cross-calibration between FY-3A/TOU and Metop-B/GOME-2[J].Acta Optica Sinica,2017(1):312-320.(in Chinese)
[12]赵富强,王维和,邓小波,等.大气臭氧总量与吸收性气溶胶指数的关系[J].遥感学报,2017,21(4):500-508ZHAO F Q,WANG W H,DENG X B,et al..The relationship between absorbing aerosol index and zone and the effect of ozone uncertainty on the retrieval of aerosol index[J].Journal of Remote Sensing,2017,21(4):500-508.(in Chinese)
[13]HEALTH D F,KRUEGER A J,ROEDER H A,et al..The solar backscatter ultraviolet and total ozone mapping spectrometer/SBUV/TOMS/for nimbus G[J].Optical Engineering,1975,14(4):323-331.
[14]HERMAN J R,CELARIER E A.Earth surface reflectivity climatology at 340-380 nm from TOMS data[J].Journal of Geophysical Research:Atmospheres(1984-2012),1997,102(D23):28003-28011.
[15]FOWLER W K,NELSON V W.Performance of various diffuser materials in the absolute radiometric calibration of the SBUV-2[J].Metrologia,1993,30(4):255.
[16]HILAWNEATH E,HERZIG H H,WILLIAMSD E,et al..Effects of Space Shuttle flight on the reflectance characteristics of diffusers in the nearinfrared,visible,and ultraviolet regions[J].Optical Engineering,1994,33(11):3675-3682.
[17]Environment and Climate Change Canada,Toronto(n.d.).World meteorological organization-global atmosphere watch program(WMO-GAW)/World Ozone and Ultraviolet Radiation Data Centre(WOUDC)[Z/OL].https://woudc.org.[2017-09-06],[2018-03-07].
[18]刘成保,王维和,杨磊.FY-3C/臭氧总量探测仪太阳辐照度偏差的修正[J].光学精密工程,2015,23(7):1859-1866.LIU CH B,WANG W H,YANG L.Revision of solar irradiance of FY-3C/TOU[J].Opt.Precision Eng.,2015,23(7):1859-1866.(in Chinese)
[19]KLEIPOOL Q L,DOBBER M R,DE HAAN J F,et al..Earth surface reflectance climatology from 3years of OMI data[J].Journal of Geophysical Research:Atmospheres(1984-2012),2008,113(D18).
[20]HERMAN J R,KROTKOV N,CELARIER E,et al..Distribution of UV radiation at the Earths surface from TOMS-measured UV-backscattered radiances[J].Journal of Geophysical Research,1999,104(D10):12059-12076.
[21]DAVE J V.Meaning of successive iteration of the auxiliary equation in the theory of radiative transfer[J].Astrophysical Journal,1964,140(3):1292.
[22]EGCHI N,YOKOTA T.Investigation of clearsky occurrence rate estimated from CALIOP and MODIS observations[J].Geophysical Research Letters,2008,35(23):1128-1137.