NDLI: Impact of Soil Structure on Microwave Volume Scattering Evaluated by a Two-Dimensional Numerical Model

Content Provider	IEEE Xplore Digital Library
Author	Onier, C. Chanzy, A. Chambarel, A. Rouveure, R. Chanet, M. Bolvin, H.
Copyright Year	1980
Abstract	Soil volumetric structure is an important parameter for tillage operation. The aim of this paper is to assess whether volume characteristics can be inferred from radar measurements. A 2-D numerical model (the 2DSCAT model) was developed based on a numerical solver using a time-domain finite-element method to solve Maxwell's equations. Perfectly matched layers were implemented as well as a near- to far-field transformation. A focused incident beam was generated by adapting the boundary conditions. To represent the soil structure, a simulator was developed describing the soil as biphasic media (fine earth and clods). Clods were represented by randomly deformed ellipses, with randomly determined dimensions, locations, and orientations. The model performed successfully, as evaluated against exact analytical solutions available for an infinite perfectly conducting cylinder and the reflection of flat semi-infinite media. The model was then evaluated against measurements made by an X-band FM continuous-wave radar on a box filled with dry clods of different sizes. The effect of the clod size on the backscattering power was very well reproduced, showing the potential of using a 2-D numerical model to understand microwave-backscattering patterns from cloddy soils. Analysis of the volume scattering shows that this phenomenon can be mostly hidden in the scatter diagram by surface scattering when the latter occurred. However, the volume scattering gives a stronger residual signal in time because of propagation through the medium. Thus, time studies of the scattering signal provide further information about volume heterogeneities.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	415
Ending Page	425
Page Count	11
File Size	1213766
File Format	PDF
ISSN	01962892
Volume Number	49
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil Numerical models Radar scattering Radar measurements Time domain analysis Finite element methods Maxwell equations Perfectly matched layers Boundary conditions Earth volume scattering Agricultural practices microwave numerical modeling radar remote sensing soil structure surface roughness tilled soil
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Impact of soil structure on microwave volume scattering evaluated by a two-dimensional numerical model

Cell-centered finite-volume-based perfectly matched layer for time-domain Maxwell system

The prolate and oblate spheroid perfectly matched layers

Optimization of the Perfectly Matched Layer for the Finite-Element Time-Domain Method

Squeezing of Open Boundaries by Maxwell-Consistent Real Coordinate Transformation

Time-domain finite-element simulation of three-dimensional scattering and radiation problems using perfectly matched layers

Second-Order Perfectly Matched Layers for the Time-Domain Finite-Element Method

A study of the condition number of various finite element matrices involved in the numerical solution of Maxwell's equations

On the long-time behavior of unsplit perfectly matched layers

Impact of Soil Structure on Microwave Volume Scattering Evaluated by a Two-Dimensional Numerical Model

Similar Documents

Impact of soil structure on microwave volume scattering evaluated by a two-dimensional numerical model

Cell-centered finite-volume-based perfectly matched layer for time-domain Maxwell system

The prolate and oblate spheroid perfectly matched layers

Optimization of the Perfectly Matched Layer for the Finite-Element Time-Domain Method

Squeezing of Open Boundaries by Maxwell-Consistent Real Coordinate Transformation

Time-domain finite-element simulation of three-dimensional scattering and radiation problems using perfectly matched layers

Second-Order Perfectly Matched Layers for the Time-Domain Finite-Element Method

A study of the condition number of various finite element matrices involved in the numerical solution of Maxwell's equations

On the long-time behavior of unsplit perfectly matched layers

Impact of Soil Structure on Microwave Volume Scattering Evaluated by a Two-Dimensional Numerical Model