Modeling the Passive Microwave Remote Sensing of Snow Using Dense Media Radiative Transfer Theory with Nmm3d Rough- Surface Boundary Conditions
نویسندگان
چکیده
The effects of volume scattering and rough-surface scattering in passive microwave remote sensing are treated. The volumescattering model is based on dense medium radiative transfer (DMRT) theory with quasicrystalline approximation (QCA) for densely distributed sticky particles. The rough-surface bistatic scattering and emission are modeled using the numerical Maxwell model of 3D simulations (NMM3D). The bistatic scattering coefficients and emissivity of rough surfaces are utilized as the boundary conditions for the DMRT. Full multiple scattering solutions are calculated by solving the DMRT numerically. The results are illustrated for a layer of dry snow over rough ground at 18.7 and 36.5 GHz. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 557–562, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop. 21407
منابع مشابه
A Partial Coherent Physical Model of Third and Fourth Stokes Parameters of Sastrugi Snow Surfaces over Layered Media with Rough Surface Boundary Conditions of Con- Ical Scattering Combined with Vector Ra- Diative Transfer Theory
In this paper, a partial coherent approach is used to study the third and fourth Stokes parameters in passive microwave remote sensing of Sastrugi snow surface over layered snow structures. The incoherent part of the model consists of using radiative transfer theory for the snow layers. The coherent part of the model is using numerical solutions of Maxwell equations to derive the bistatic scatt...
متن کاملSnow Retrieval Algorithm for Passive Microwave Remote Sensing Using Dense Media Radiative Transfer Theory
The Quasi-crystalline Approximation and the Dense Media Radiative Transfer Equation (QCADMRT) have been applied to active and passive microwave remote sensing of snow [1] [2]. The salient features of the model include weaker frequency dependence than Mie scattering for the same grain size and a stronger forward scattering than Rayleigh phase function. We use passive microwave satellite data fro...
متن کاملModeling Microwave Emission at High Frequency from Stratified Snow Using Dense Media Radiative Transfer Theory Based on the Quasicrystalline Approximation (qca/dmrt)
1. ABSTRACT The multi-layer dense media radiative transfer (DMRT) theory based on the quasicrystalline approximation (QCA) has been applied for studying both passive and active microwave remote sensing signatures [1], [2]. It is shown that the layered structure is essential to analyze the microwave emission from snow because high frequency is sensitive to the scattering from the medium top and ...
متن کاملSimulation of the microwave emission of multi-layered snowpacks using the Dense Media Radiative transfer theory: the DMRT-ML model
DMRT-ML is a physically based numerical model designed to compute the thermal microwave emission of a given snowpack. Its main application is the simulation of brightness temperatures at frequencies in the range 1–200 GHz similar to those acquired routinely by spacebased microwave radiometers. The model is based on the Dense Media Radiative Transfer (DMRT) theory for the computation of the snow...
متن کاملApplications of dense media radiative transfer theory for passive microwave remote sensing of foam covered ocean
The effect of the foam covered ocean surface on the passive microwave remote sensing measurements is studied based on the electromagnetic scattering theory. In fomulating an electromagnetic scattering model, we treat the foam as densely packed sticky air bubbles coated with thin seawater coating. The layer of foam covers the ocean surface that has air bubbles. We then use dense media radiative ...
متن کامل