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9 April 2003 Validation of the retrieved aerosol's optical parameters from POLDER data
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Aerosols three optical parameters, namely, its optical thickness ta(500) at the wavelength of 500nm, Angstrom exponent a, and real part of refractive index Nr, were retrieved from ADEOS/POLDER data by analyzing the observed directional reflectance and polarization information. In this retrieval we applied the directional R-P(Reflectance-Polarization) algorithm to the POLDERs 865nm band data. This retrieval algorithm was proposed previously in our paper and we extend it in this study. The validation on the retrieved results was made by comparing with the sky observation data. We found that the correlation coefficient between the retrieved and measured values was good (R=0.86) in the aerosol optical thickness, whereas it is poor(R=0.32) in Angstrom exponent. In addition, we presented the monthly averaged distribution maps of aerosol's three optical parameters over the oceans from the Indian Ocean to the western Pacific Ocean during April 1-31, 1997. This study indicated that there are extended aerosol regions with large values of real part of refractive index (Nr>1.5) in April in the tropical zone.
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Yoshiyuki Kawata, Atsuo Mori, and Yasuyuki Kimura "Validation of the retrieved aerosol's optical parameters from POLDER data", Proc. SPIE 4891, Optical Remote Sensing of the Atmosphere and Clouds III, (9 April 2003);

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