Last edited by Shakanris
Tuesday, October 20, 2020 | History

2 edition of Measurement of ground dielectric properties using wide-angle reflection and refraction found in the catalog.

Measurement of ground dielectric properties using wide-angle reflection and refraction

Steven A. Arcone

Measurement of ground dielectric properties using wide-angle reflection and refraction

by Steven A. Arcone

  • 80 Want to read
  • 21 Currently reading

Published by U.S. Army Corps of Engineers, Cold Regions Research & Engineering Laboratory in Hanover, N.H .
Written in English

    Subjects:
  • Dielectric measurements.,
  • Radar -- Equipment and supplies.

  • Edition Notes

    StatementSteven A. Arcone and Allan J. Delaney ; prepared for Office of the Chief of Engineers.
    SeriesCRREL report -- 82-6.
    ContributionsDelaney, Allan J., Cold Regions Research and Engineering Laboratory (U.S.), United States. Army. Corps of Engineers.
    Classifications
    LC Classifications.C6 Report 82-6
    The Physical Object
    Paginationiii, 11 p. :
    Number of Pages11
    ID Numbers
    Open LibraryOL17549699M

    In this paper, we propose a novel metamaterial-based microfluidic sensor that permits the monitoring of properties of the fluid flowing in the microfluidic reservoir embedded between the composite left–right handed (CLRH) microstrip line and the ground plane. The sensor’s working principle is based on the phase shift measurement of the two signals, the referent one that is guided through. Material properties 26 Wave Nature of Electromagnetic Fields 27 Wave properties 29 Ground penetrating radar source near an interface 30 Reflection, refraction, and transmission at interfaces 32 Resolution and zone of influence 33 Scattering attenuation 35 Signal Measurement

    By using equations 1 and 2 with a correct application of the skin depth concept, it is possible to model (and measure in practice) deeper penetration of radio waves into the ground. For a given frequency in a uniform material, losses are proportional to distance no matter what the mechanism for signal attenuation/loss is. Ground-penetrating radar is not suitable for imaging through saline water. This section of the book will include a discussion of the theoretical concepts underlying GPR operation and the application of GPR for paleolimnological research. Groundpenetrating radar is widely utilized for a wide variety of geoscience applications from imaging.

    Propagation of the radar signal depends on the electric properties of the rock, mainly the dielectric constant and electrical conductivity. These properties are primarily controlled by fluid content and the presence of clay minerals. Where these properties change abruptly in the subsurface, part of the energy is reflected back to the surface.   Reflection and refraction of obliquely incident rays, 30 Critical refraction, 31 Diffraction, 31 Reflection and refraction surveying, 32 Seismic data acquisition systems, 33 Seismic sources and the seismic/ acoustic spectrum, 34 Seismic transducers, 39 Seismic recording systems, 41 Problems, 42 Further.


Share this book
You might also like
Dynamic forces in spur gears--measurement, prediction, and code validation

Dynamic forces in spur gears--measurement, prediction, and code validation

Is the Holocaust unique?

Is the Holocaust unique?

Licking countys gallant soldiers

Licking countys gallant soldiers

early masterpieces

early masterpieces

Challenge and response

Challenge and response

Handwriting of the Renaissance

Handwriting of the Renaissance

Spelling Connections

Spelling Connections

Managing your mind

Managing your mind

The interaction of knowledge of results as response outcome and goal information in motor skill acquisition

The interaction of knowledge of results as response outcome and goal information in motor skill acquisition

Ecumenical movement in the 1960s

Ecumenical movement in the 1960s

Intimate partner violence and womens economic insecurity

Intimate partner violence and womens economic insecurity

Self-leveler for tobacco farm tractor-loaders

Self-leveler for tobacco farm tractor-loaders

Police-community action, a program for change in police-community behavior patterns

Police-community action, a program for change in police-community behavior patterns

Measurement of ground dielectric properties using wide-angle reflection and refraction by Steven A. Arcone Download PDF EPUB FB2

Get this from a library. Measurement of ground dielectric properties using wide-angle reflection and refraction. [Steven A Arcone; Allan J Delaney; Cold Regions Research and Engineering Laboratory (U.S.); United States.

Army. Corps of Engineers.]. J ournal ofGlaciology, Vol. 21, No. 85, DIELECTRIC PERMITTIVITY OF GLACIER ICE MEASURED IN SITU BY RADAR WIDE-ANGLE REFLECTION* By K ENNETH C.

JEZEK, (Geophysical and Polar Research Center, University of Wisconsin, Madison, Wisconsin Erica Carrick Utsi, in Ground Penetrating Radar, Wide Angle Reflection and Refraction. Wide angle reflection and refraction (WARR) is also sometimes called common midpoint or CMP for short.

This method of velocity calibration relies on having separable antennas. Wide-angle reflection and refraction (WARR) sounding determines propagation velocity versus depth when performed in layered areas. To obtain a WARR sounding, one measures travel time versus. Refracted phases have been a recognized feature in wide-angle common midpoint (CMP) and common shotpoint (CSP) ground-penetrating radar (GPR) surveys for many years, but historically their use has.

Reflection Layer Boundary Ground Surface (b) Wide Angle Velocity Measurement. Controller Transmitting Receiving 1 Wave Reflection Layer Boundary Ground Receiving 2 Receiving 3 Surface (c) Measurement of dielectric values using array of multi-offset receivers.

Fig. Mapping buried archaeological ruins. Detection of unmarked graves in. & A. Delaney, Measurement of Ground Dielectric Properties Using Wide-angle Reflection and Refraction.

U.S. Army Cold S. A., N. Yankielun & E. Chacho, Reflection profiling of arctic lake ice using microwave FM-CW radar. IEEE Transactions on Geoscience and Remote Sensing – S., Radio techniques for.

Radar is a detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same.

Seismic reflection and refraction methods are routinely used to illuminate sub Bialas J, Reichert C () Crustal structure of the Java margin from seismic wide-angle and multichannel reflection data. J Geophys Res ETG –ETG Google Scholar. Kopp H, Weinzierl W, Becel A, Charvis P, Evain M, Flueh ER, Gailler A, Galve A, Hirn A.

In this article, it has been theoretically shown that broad angle negative refraction is possible with asymmetric anisotropic metamaterials (AAMs) constructed by only dielectrics. The realized metasurface was able to achieve good refraction characteristics while causing minimal reflections for wide-angle refraction from normal incidence to ° at 20 GHz.

The reflection and refraction of the metasurface were measured using a combination of quasi-optical (setup shown in Figure 10) and far-field measurements and can be.

(a) Wide angle reflection and refraction (WARR) acquisition, (b) common-midpoint (CMP) measurement made with a MHz antenna at the Cambridge Research Station, University of Guelph, ON, Canada.

To collect the reflected data, only one antenna will be used. Experiments on ultrathin anisotropic arrays of subwavelength optical antennas display out-of-plane refraction. A powerful three-dimensional (3D) extension of the recently demonstrated generalized laws of refraction and reflection shows that the interface imparts a tangential wavevector to the incident light leading to anomalous beams, which in general are noncoplanar with the incident beam.

Fig. Schematic wide angle reflection and refraction (WARR) measurement. The ground wave can be identified as a wave with a linear move out starting from the origin of the x–t plot. In the slope equations, c is the electromagnetic velocity in air and x is the antenna separation (after Sperl, ).

Ground Penetrating Radar (GPR) is the general term applied to techniques which employ radio waves, typically in the 1 to MHz frequency range, to map structures and features buried in the ground (or in man-made structures).

Historically, GPR was primarily focused on mapping structures in the ground; more recently GPR has been used in non-destructive testing of non-metallic structures. Ground-penetrating radar (GPR) is a rapidly developing field that has seen tremendous progress over the past 15 years.

The development of GPR spans aspects of geophysical science, technology, and a wide range of scientific and engineering applications. Bandpass Filter. Lets start with some all-dielectric filters simulated with constant (not wavelength dependent) indexes of refraction.

Here is a layer Wide Infrared Bandpass Filter produced by Software Spectra, Inc.'s TFCalc program, which incrementally optimized its design.

A real-world guide to practical applications of ground penetrating radar (GPR) The nondestructive nature of ground penetrating radar makes it an important and popular method of subsurface imaging, but it is a highly specialized field, requiring a deep understanding.

Full text of "Antennas: Fundamentals, Design, Measurement" See other formats. Using CMP and WARR configurations to measure velocity. Transmitting and receiving antennas with variable bandwidths are required for CMP (Common Mid Point) and WARR (Wide Angle Reflection Refraction) configurations.

For CMP configuration, measurements are performed when both antennas are put on either side of a fixed point. Ground-penetrating radar or georadar is a popular method in engineering and archeology for investigation of objects in shallow subsurface at high resolution. Georadars produce electromagnetic waves which propagate into the subsurface, and its interaction with the dielectric contrast is reflected and recorded in the radargram.

It is an environmentally safe and nondestructive method and can be. The first attempts at measuring the optical properties of X-rays such as refraction, reflection and diffraction are described.

The main ideas forming the basis of Ewald's thesis in are then summarized. The first extension of Ewald's thesis to the X-ray case is the introduction of the reciprocal lattice. In the next step, the principles of the three versions of the dynamical theory of.where Y 0, Y i, and are the intrinsic the intrinsic admittance of vacuum, meta-surface, dielectric spacer and metal, ε d and ε m are permittivity of dielectric and metal, k 0 and are the wave vectors in the vacuum and dielectric spacer, R m = (Y 1 − Y m)/(Y 1 + Y m) is the reflection coefficient at the ground plane, J is the surface current.