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Remote Sensing Technology and Application  2012, Vol. 27 Issue (4): 504-510    DOI: 10.11873/j.issn.1004-0323.2012.4.504
    
Intercalibration of SVISRR/FY-2 Thermal Infrared Channels with AIRS/Aqua Channels
Jiang Gengming,Jin Yaqiu
(Key Laboratory of Wave Scattering and Remote Sensing Information,Fudan University,Shanghai 200433,China)
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Abstract  

Intercalibration of the thermal infrared window channels 1(~10.9 μm)and2 (~11.9 μm) of the Stretched Visible and Infrared Spin Scan Radiometer on FengYun 2 (SVISSR/FY-2) satellites C,D and E with the hyper-spectral channels of the Atmospheric InfraRed Sounder on board Aqua (AIRS/Aqua) was developed using the High Spectral Convolution (HSC) method,which was improved in two aspects,sub-pixel spatial matching and automatic removal of the measurement pairs with coarse errors.According to the view geometries of SVISSR/FY-2 and AIRS/Aqua,with the study area longitude from 41.5°E to 149.5°E and the latitude from 10°S to 10°N was selected.To transfer the calibration coefficients from AIRS/Aqua channels to SVISSR/FY-2 channels,the SVISSR/FY-2 Normalized (NOM) 1B data and AIRS/Aqua 1B infrared product in December of 2006,September of 2007,December of 2007,September of 2009 and May of 2010 covering the study area were employed and aggregated with longitude and latitude spatial resolutions of 0.5°×0.5°.Measurement pairs are extracted from the aggregated SVISSR/FY-2 and AIRS/Aqua images with the following criterions:co-location,absolute solar zenith angle difference in the same day less than 2°(|ΔSZA|<2°),absolute viewing zenith angle differences less than 3°(|ΔVZA|<3°),and absolute relative azimuth angle differences less than 6°(|ΔRAA|<6°).The results show that the SVISSR/FY-2 measurements are linearly related to the convolved AIRS/Aqua measurements with large correlation coefficients.Conversely,AIRS/Aqua channels,the calibration biases exist in the two SVISSR/FY-2 thermal infrared channels,and the re-calibration coefficients are presented.

Key words:  Intercalibration      SVISSR/FY-2      AIRS/Aqua      Thermal infrared channels     
Received:  01 September 2011      Published:  24 August 2012
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Jiang Gengming,Jin Yaqiu. Intercalibration of SVISRR/FY-2 Thermal Infrared Channels with AIRS/Aqua Channels. Remote Sensing Technology and Application, 2012, 27(4): 504-510.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2012.4.504     OR     http://www.rsta.ac.cn/EN/Y2012/V27/I4/504

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