Influence of Sun-view geometries on the relationships among vegetation indices, LAI, and absorbed PAR

Author

Epiphanio, José C N ; Huete, Alfredo R. ; Liu, Hui Qing

Author_Institution

Dept. of Soil & Water Sci., Arizona Univ., Tucson, AZ, USA

Volume

3

fYear

1994

fDate

8-12 Aug 1994

Firstpage

1455

Abstract

The absorbed photosynthetically active radiation (APAR) and leaf area index (LAI) of vegetated surfaces have been addressed as important parameters to be included in growth and productivity models. However, surface heterogeneities render the signal detected by the remote sensor sensitive to illumination/view geometry and background (e.g. soil, litter) reflectance properties. In addition, there is the influence of the intervening and variable atmosphere. In this study, the Myneni radiative canopy model in conjunction with the `65´ atmospheric model, were used to simulate the optical properties of both uniform and heterogeneous vegetated surfaces. The relationships among fAPAR, LAI, and VIs under various Sun-view geometries are investigated

Keywords

forestry; geophysical techniques; infrared imaging; remote sensing; 65 atmospheric model; LAI; Myneni radiative canopy model; Sun-view geometry; absorbed PAR; forest forestry; geophysical measurement technique; illumination angle; leaf area index; light scattering; optical imaging; optical properties; optical property; photosynthetically active radiation; remote sensing; vegetated surface; vegetation; view geometry; visible IR infrared; Atmosphere; Atmospheric modeling; Geometrical optics; Geometry; Lighting; Productivity; Reflectivity; Remote sensing; Signal detection; Soil;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International

Conference_Location

Pasadena, CA

Print_ISBN

0-7803-1497-2

Type

conf

DOI

10.1109/IGARSS.1994.399467

Filename

399467