Modeling the bidirectional reflectance for a semi-arid landscape

Author

Ni, Wenge

Author_Institution

Raytheon, Lanham, MD, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

401

Abstract

A model for the bidirectional reflectance over soils is coupled into a vegetation model to predict the bidirectional reflectance of a semi-arid landscape. The vegetation model is a hybrid of geometric optical and radiative transfer (GORT) model for the bidirectional reflectance over discontinuous plant canopies. The coupling is done by extending the assumption of Lambertian background in the GORT model into a non-Lambertian soil background described by Hapke´s soil BRDF model. The model is validated with POLDER and AVHRR imagery collected in a semi-arid site during the Jornada PROVE´97 campaign with good accuracy. It is a very simple but analytical model for bidirectional reflectance over a semi-arid landscape and has the potential for surface parameter retrieval for the study of biosphere-atmosphere interaction

Keywords

geophysical techniques; light scattering; terrain mapping; vegetation mapping; BRDF; GORT model; Lambertian background; bidirectional reflectance distribution function; desert; discontinuous canopy; geometric optical model; geophysical measurement technique; land surface; light scattering; model; nonLambertian model; optical imaging; radiative transfer model; remote sensing; semi-arid landscape; soil; terrain mapping; vegetation; Analytical models; Bidirectional control; Geometrical optics; Land surface; Optical scattering; Reflectivity; Satellites; Soil; Solid modeling; Vegetation mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International

Conference_Location

Hamburg

Print_ISBN

0-7803-5207-6

Type

conf

DOI

10.1109/IGARSS.1999.773513

Filename

773513