نتایج جستجو برای: penetrating radar gpr measurements in this paper

تعداد نتایج: 17270682  

2002
Timothy W. Miller Brian Borchers Jan M. H. Hendrickx Sung - Ho Hong Louis W. Dekker Coen J. Ritsema

-Field experience has shown that soil conditions can have large effects on Ground Penetrating Radar (GPR) detection of landmines. We discuss available models for the prediction of the dielectric constant from soil physical properties including bulk density, soil texture, and water content. The soil dielectric constant determines the attenuation of the radar signal. The contrast between the diel...

1998
David W.A. Taylor

ENSCO, Inc. is investigating a novel approach to data fusion of magnetic and ground-penetrating radar (GPR) data to characterize previously detected buried targets. The method exploits a single model of the subsurface to predict both magnetic and GPR data observations. By determining the best single model that constrains both data sets, the optimum identification is computed. Using an a priori ...

2008
M. B. Charlton K. White

Radar remote sensing techniques are becoming more widely applied in dryland regions, because the lower frequency Synthetic Aperture Radar (SAR) systems enable significant penetration into the subsurface under very dry conditions, allowing subsurface characteristics to be interpreted. Field experiments at two contrasting sites in the Libyan Fazzān show ground-penetrating radar (GPR) can be used ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی 1387

abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...

2017
Ikechukwu K. Ukaegbu Kelum A. A. Gamage

Radioactive sources exist in environments or contexts that influence how they are detected and localised. For instance, the context of a moving source is different from a stationary source because of the effects of motion. The need to incorporate this contextual information in the radiation detection and localisation process has necessitated the integration of radiological and contextual sensor...

2014
Alireza Akbari

In ground penetrating radar (GPR) imaging, a single point target appears as a hyperbolic curve in the space-time image. In order to focus the hyperbolic curves in GPR images, first, the back-projection (BP) imaging algorithm was introduced. This standard BP imaging algorithm, was accompanied by a lot of artifacts, which have adverse effects on targets detection. Second, an improved BP imaging a...

Journal: :Remote Sensing 2023

Ground-penetrating radar (GPR) has been extensively utilized in deep-space exploration. However, GPR modeling commonly employs simplified antenna models and carrier-free impulse signals, resulting reduced accuracy interpretability. In this paper, we addressed these limitations by combining a tilted monopole linear frequency modulation continuous wave (LFMCW) to simulate real conditions. Additio...

1996
Zhubo Huang Kenneth Demarest

-Detecting subsurface objects by using GroundPenetrating Radar (GPR) has received considerable interest in recent years. In order to interpret radar signals from buried objects, one must have the ability to model a large range of objects, grounds and radar antennas, theoretically or numerically, so that a real GPR system can be simulated. Many investigations have been done for modeling objects ...

2009
Mohammad Riahi Amirhossein Tavangar

The landmines presence causes serious safety hazards, which demand the clean up of contaminated land. Ground Penetrating Radar (GPR) is considered as a powerful nondestructive testing tool for high-resolution imaging of the shallow subsurface and its ability to detect both metallic and non-metallic landmines. The contrast in the dielectric constant between a landmine and the surrounding soil is...

Journal: :Remote Sensing 2021

Root system architecture (RSA) refers to the geometric features and topology of root system. Ground-penetrating radar (GPR) is a possible method RSA reconstruction. However, because not directly accessible by GPR, GPR-based reconstruction must be complemented manual connection points, resulting in limited accuracy. In this study, we used both GPR direct excavation obtain 3D coordinates (XYZ coo...

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