Relations for the Fresnel reflection coefficients of a bimaterial interface independent of the angle of planewave incidence

1988 ◽  
Vol 9 (7) ◽  
pp. 631-634 ◽  
Author(s):  
A. Lakhtakia ◽  
V. V. Varadan ◽  
V. K. Varadan
Keyword(s):  
Bimaterial Interface ◽  
Reflection Coefficients ◽  
Fresnel Reflection

scholarly journals Method for Remote State Identification Snow-Ice Cover by the Ratio of Fresnel Reflection Coefficients

2020 ◽  
Vol 23 (5) ◽  
pp. 46-56
Author(s):  
V. G. Mashkov
Keyword(s):  
Landing Site ◽  
Ice Cover ◽  
The State ◽  
Reflection Coefficients ◽  
Fresnel Reflection ◽  
State Identification ◽  
Key Factor ◽  
Helicopter Landing ◽  
Standard Values ◽  
Remote Identification

Introduction. Currently, the development of safe helicopter landing systems as the most complex and dangerous stage of a flight is one of the priority tasks. A significant number of companies in Russia and abroad are engaged in its solution. Landing on unprepared (unequipped) sites with snow-ice cover may be caused by the need to deliver units, cargo and ammunition in combat conditions, search and rescue operations, evacuations of victims, etc. A key factor for a landing decision is information about the height of snow and about the depth of ice cover. In the paper remote identification of the state of snow-ice cover, excluding the need to present any person (crew member or rescue worker) on a landing site is proposed.Aim. To develop a method for the remote identification of the state of snow-ice cover used to determine the possibility of a helicopter - type aircraft safe landing on a reservoir with snow-ice cover.Materials and methods. Numerical simulation of echo signals Fresnel reflection coefficients polarization ratio was realized in MatLab. Vertical and horizontal polarizations in the range from 25 to 45 degrees were simulated.Results. Intervals of polarization relations correspond to the interval density of snow-ice layers for fixed angles. For example, when θ = 34 for dry snow ρds = 100…500 kg/m3 (ε'ds = 1.162…1.984) – Prm = 5.6915...3.3266, dry firn ρdf = 500…700 kg/m3 (ε'df = 1.984…2.51) – Prm = 3.3266...2.8311, dry ice ρdi = 700…913 kg/m3 (ε'di = 2.51…3.179) – Prm = 2.8311...2.4753. A layer reconstruction inverse problem was solved by indirect determining of complex relative permittivity of each successive underlying layer with 10-2 real part resolution. The identity of the obtained characteristics of snow-ice layers with calculated (standard) values was established.Conclusion. Remote identification of components of a snow-ice cover structure allows one to automate the process of evaluating of landing possibility. Thereby it reduces a decision-making time and increases a level of safety. In contrast to the known methods of identification of the surface layer the identification of multilayer medium layers was carried out.

Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants

2005 ◽  
Vol 4 (4) ◽  
pp. 253-263 ◽  
Author(s):  
José M. Carcione ◽  
Davide Gei ◽  
Marco A.B. Botelho ◽  
Ana Osella ◽  
Matias de la Vega
Keyword(s):  
Reflection Coefficients ◽  
Fresnel Reflection

scholarly journals Accounting for Antenna in Half-Space Fresnel Coefficient Estimation

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
A. D'Alterio ◽  
R. Solimene
Keyword(s):  
Reflection Coefficient ◽  
Half Space ◽  
Estimation Procedure ◽  
Reflection Coefficients ◽  
Fresnel Reflection ◽  
Reflection Mode ◽  
Coefficient Estimation ◽  
Fresnel Coefficient ◽  
Different Types

The problem of retrieving the Fresnel reflection coefficients of a half-space medium starting from measurements collected under a reflection mode multistatic configuration is dealt with. According to our previous results, reflection coefficient estimation is cast as the inversion of linear operator. However, here, we take a step ahead towards more realistic scenarios as the role of antennas (both transmitting and receiving) is embodied in the estimation procedure. Numerical results are presented to show the effectiveness of the method for different types of half-space media.

Determining Fresnel reflection coefficients in 3D half-space geometry by GPR multistatic data

2011 ◽  
Vol 9 (3) ◽  
pp. 265-276 ◽  
Author(s):  
Raffaele Solimene ◽  
Antonietta D’Alterio ◽  
Francesco Soldovieri
Keyword(s):  
Half Space ◽  
Reflection Coefficients ◽  
Fresnel Reflection ◽  
Space Geometry

Properties of bi-isotropic Fresnel reflection coefficients

1992 ◽  
Vol 89 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Ari Sihvola ◽  
Ismo Lindell
Keyword(s):  
Reflection Coefficients ◽  
Fresnel Reflection
Sign in / Sign up

Export Citation Format

Share Document