Title :
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
fDate :
2/1/2001 12:00:00 AM
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;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
