Calculations of the soil hot-spot effect using the coherent backscattering theory

✍ Scribed by Shunlin Liang; Michael I. Mishchenko

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 920 KB
• Volume: 60
• Category: Article
• ISSN: 0034-4257
• DOI: 10.1016/s0034-4257(96)00179-4

✦ Synopsis

The shadowing theor~j has been widely used to account fi~r the hot-.spot effect fi~r the canopy and soil. However, it is not valid for soils' that are composed of fine particles and &~ not have weU-defined shadows. The coherent backseattering theorTj is used in this study to calculate both the nuzgnitude and the angular width of the hotspot peak .fi~r clay and silt soils'. The .soil hot-spot magnitade is calculated by solving the vector radiative transfer equation. The dense nature of the soil medium is taken into account in the calcnlations of the hot-spot angular width. The results are also linked with the Hapke hotspot empirical fimction. The effects of the wavelength dependence and ~f particle size and shape als'o are examined.