Thermal emission from a layered medium bounded by a slightly rough interface

Author

Johnson, Joel T.

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

39

Issue

2

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

368

Lastpage

378

Abstract

The small perturbation method (SPM) is applied to study thermal emission from a layered medium bounded by a slightly rough interface. Brightness temperatures are calculated to second order in surface height, including both specular reflection coefficient corrections and incoherent Bragg scatter terms. Unlike the homogeneous medium case, in which the SPM applied for emission predictions produces an expansion in surface slope, the theory remains a small height expansion, and convergence of the series is shown to depend on properties of the layered medium. Results from this theory can be applied in studies of soil moisture, sea ice, or sea surface remote sensing and buried object detection with microwave radiometers

Keywords

buried object detection; geophysical techniques; hydrological techniques; moisture measurement; oceanographic techniques; radiometry; remote sensing; sea ice; soil; terrain mapping; brightness temperature; buried object detection; geophysical measurement technique; geothermal method; height expansion; hydrology; incoherent Bragg scatter; land surface; layered medium; microwave radiometry; ocean; remote sensing; rough interface; sea ice; sea surface; slightly rough interface; small perturbation method; soil moisture; specular reflection coefficient; terrain mapping; terrestrial heat; theory; thermal emission; Brightness temperature; Buried object detection; Ocean temperature; Perturbation methods; Reflection; Rough surfaces; Scanning probe microscopy; Scattering; Sea surface; Surface roughness;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.905245

Filename

905245