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A unified regression method to calculate fast transmittance coefficients is used in fast radiative transfer calculation of satellite infrared channel by a convoluted transmittances database from LBL (Line_By_Line) model. Comparison is performed between the fast calculated brightness temperature and LBL calculations for VISSR/FY-2F and IRAS/FY-3B. The examination indicates that STD (Standard Deviation) of fast calculated brightness temperature in window channels are much larger than the values in sounding channels. The lower atmosphere the channel detects, the larger the STD is available. And the largest the STD is less than 0.4 K. In this paper, a discussion is given to the improvement of fast radiative transfer calculation brought about by Planck weighted correction for convoluted channels' transmittances. Analysis shows that overlap between 2350 cm-1 and spectral response filter of the channel is a requirement to the Planck weighted correction. It is shown that STDs of brightness temperature between LBL calculation and fast computation are decreased by 25% after Planck weighted correction. And the improvement is available only for such channels with an overlap between their filter function and 2350 cm-1. Also it is indicated that the improvement from Planck weighted correction could be used not only to the imaging channels that have wide spectral coverage, but also to the sounding channels with very narrow spectral fields.
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Keywords:
- Planck weighted correction /
- channel at 2350 cm-1 /
- fast radiative calculation /
- Fengyun satellite
[1] Zhang L, Huang S X, Shen C, Shi W L 2011 Chin. Phys. B 20 119201
[2] Liu C, Bai W G, Zhang P, Sun W Y, Si F Q 2013 Acta Phys. Sin. 030704 (in Chinese)[刘诚 白文广 张鹏 孙文友 司福祺 2013 物理学报 62 030704]
[3] [4] [5] Eyre J R 1991 ECMWF Tech. Memo., No. 176 (Reading: European Centre for Medium-Range Weather Forecasts)
[6] Saunders R, Matricardi M, Brunel P 1999 Quart. J. Roy. Meteor. Soc. 125 1407
[7] [8] Matricardi M, Saunders R 1999 Appl. Opt. 38 5679
[9] [10] Matricardi M, Chevallier F Tjemkes S 2001 ECMWF Tech. Memo. (No. 345) (Reading: European Centre for Medium-Range Weather Forecasts)
[11] [12] [13] Han Y, van Delst P, Liu Q 2006 NOAA Tech. Rep. (No. 122) (College Park: NESDIS STAR)
[14] Chen Y, Weng F, Han Y 2008 J. Geophys. Res. 113 D00A03
[15] [16] [17] Sun Y W, Zeng Y, Liu W Q, Xie P H, Chan K L, Li X X, Wang S M, Huang S H 2012 Chin. Phys. B 21 090701
[18] Sun B, Wang H, Sun X B, Hong J, Zhang Y J 2012 Chin. Phys. B 21 129501
[19] [20] McMillin L M, Xiong X, Han Y, Thomas J K, Paul V D 2006 Appl. Opt. 45 2028
[21] [22] Matricardi M 2008 ECMWF Research Dept. Tech. Memo. (No. 564) (Reading: European Centre for Medium-Range Weather Forecasts)
[23] [24] Chen Y, Han Y, van Delst P, Weng F 2010 J. Geophys. Res. D 115 12303
[25] [26] Han Y, Delst P, Liu Q 2005 User's Guide to the JCSDA Community Radiative Transfer Model (Beta Version), Joint Center for Satellite Data Assimilation, Camp Springs, Maryland
[27] [28] Ma G, Qiu C J, Li G Q, Zhang F Y 2005 Journal of Infrared and Millimeter Waves 25 37 (in Chinese)[马刚, 邱崇践, 黎光清, 张凤英, 2005 红外与毫米波学报 25 37]
[29] [30] [31] Sun W Y, Xie P H, Xu J, Zhou H J, Liu C, Wang Y, Liu W Q, Si F Q, Zeng Y 2013 62 130703 (in Chinese)[孙文友, 谢品华, 徐晋, 周海金, 刘诚, 王杨, 刘文清, 司福祺, 曾议 2013 物理学报 130703]
[32] [33] Turner S 2000 Appl. Opt. 11 2369
[34] McMillin L M Crone L J Kleespies T J 1995 Applied Optics 34 8396
[35] [36] [37] Chen Y, Weng F, Han Y, Liu Q 2012 J. Atmos. Oceanic Technol. 29 382
[38] Edwards D P 1992 NCAR Technical Note, NCAR/TN-367+STR (Boulder: NCAR)
[39] [40] Chevallier F Chdin A Cheruy F Morcrette J J 2000 Quart. J. Roy. Meteor. Soc. 126 777
[41] -
[1] Zhang L, Huang S X, Shen C, Shi W L 2011 Chin. Phys. B 20 119201
[2] Liu C, Bai W G, Zhang P, Sun W Y, Si F Q 2013 Acta Phys. Sin. 030704 (in Chinese)[刘诚 白文广 张鹏 孙文友 司福祺 2013 物理学报 62 030704]
[3] [4] [5] Eyre J R 1991 ECMWF Tech. Memo., No. 176 (Reading: European Centre for Medium-Range Weather Forecasts)
[6] Saunders R, Matricardi M, Brunel P 1999 Quart. J. Roy. Meteor. Soc. 125 1407
[7] [8] Matricardi M, Saunders R 1999 Appl. Opt. 38 5679
[9] [10] Matricardi M, Chevallier F Tjemkes S 2001 ECMWF Tech. Memo. (No. 345) (Reading: European Centre for Medium-Range Weather Forecasts)
[11] [12] [13] Han Y, van Delst P, Liu Q 2006 NOAA Tech. Rep. (No. 122) (College Park: NESDIS STAR)
[14] Chen Y, Weng F, Han Y 2008 J. Geophys. Res. 113 D00A03
[15] [16] [17] Sun Y W, Zeng Y, Liu W Q, Xie P H, Chan K L, Li X X, Wang S M, Huang S H 2012 Chin. Phys. B 21 090701
[18] Sun B, Wang H, Sun X B, Hong J, Zhang Y J 2012 Chin. Phys. B 21 129501
[19] [20] McMillin L M, Xiong X, Han Y, Thomas J K, Paul V D 2006 Appl. Opt. 45 2028
[21] [22] Matricardi M 2008 ECMWF Research Dept. Tech. Memo. (No. 564) (Reading: European Centre for Medium-Range Weather Forecasts)
[23] [24] Chen Y, Han Y, van Delst P, Weng F 2010 J. Geophys. Res. D 115 12303
[25] [26] Han Y, Delst P, Liu Q 2005 User's Guide to the JCSDA Community Radiative Transfer Model (Beta Version), Joint Center for Satellite Data Assimilation, Camp Springs, Maryland
[27] [28] Ma G, Qiu C J, Li G Q, Zhang F Y 2005 Journal of Infrared and Millimeter Waves 25 37 (in Chinese)[马刚, 邱崇践, 黎光清, 张凤英, 2005 红外与毫米波学报 25 37]
[29] [30] [31] Sun W Y, Xie P H, Xu J, Zhou H J, Liu C, Wang Y, Liu W Q, Si F Q, Zeng Y 2013 62 130703 (in Chinese)[孙文友, 谢品华, 徐晋, 周海金, 刘诚, 王杨, 刘文清, 司福祺, 曾议 2013 物理学报 130703]
[32] [33] Turner S 2000 Appl. Opt. 11 2369
[34] McMillin L M Crone L J Kleespies T J 1995 Applied Optics 34 8396
[35] [36] [37] Chen Y, Weng F, Han Y, Liu Q 2012 J. Atmos. Oceanic Technol. 29 382
[38] Edwards D P 1992 NCAR Technical Note, NCAR/TN-367+STR (Boulder: NCAR)
[39] [40] Chevallier F Chdin A Cheruy F Morcrette J J 2000 Quart. J. Roy. Meteor. Soc. 126 777
[41]
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