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In this paper, we made multiple scattering simulations by assuming a single atmospheric layer model with ground surface reflection models. This paper shows the estimated results of surface reflectance A using the observed reflectance and polarization data at 443 nm, 670 nm and 865 nm over land surfaces measured by the ADEOS/POLDER. POLDER level-1 products over the Sahara Desert in West Africa taken on November 18, 1996, were investigated.

The main results of this study can be summarized as follows:

1) We found that the theoretical model can satisfy both the observed reflectance and the observed linear polarization data against different observed zenith viewing angles.

2) An assumption of Lambertian reflection for "Desert" seems to be valid. We use the Junge model with v = 3 and refractive index m = 1.55-0.005 as typical desert aerosol in this computation. (C) 2000 COSPAR. Published by Elsevier Science Ltd.