The theory and measurement of noncoherent microwave scattering parameters

1977 ◽  
Vol 25 (6) ◽  
pp. 813-822 ◽  
Author(s):  
J. Claassen ◽  
A. Fung
Keyword(s):  
Scattering Parameters ◽  
Microwave Scattering

scholarly journals Generation of Persistent Scatterers in Non-Urban Areas: The Role of Microwave Scattering Parameters

Geosciences ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 269 ◽  
Author(s):  
Giovanni Nico ◽  
Sérgio Oliveira ◽  
Joao Catalão ◽  
José Zêzere
Keyword(s):  
Urban Areas ◽  
Ground Surface ◽  
Synthetic Aperture ◽  
Scattering Parameters ◽  
Microwave Scattering ◽  
Sparse Vegetation ◽  
Persistent Scatterers ◽  
Interferometric Phase ◽  
Interferometric Sar

In this work, we study the capability of the ground surface to generate Persistent Scatterers (PS) based on the lithology, slope and aspect angles. These properties affect the scattering behavior of the Synthetic Aperture Radar (SAR) signal, the interferometric phase stability and, as a consequence, the PS generation. Two-time series of interferometric SAR data acquired by two different SAR sensors in the C-band are processed to generate independent PS datasets. The region north of Lisbon, Portugal, characterized by sparse vegetation and lithology diversity, is chosen as study area. The PS frequency distribution is obtained in terms of lithology, slope and aspect angles. This relationship could be useful to estimate the expected PS density in landslide-prone areas, being lithology, slope and aspect angles important landslide predisposing factors.

scholarly journals Microwave scattering from ice crystals: how much parameters can differ from equal volume spheres

2010 ◽  
Vol 25 ◽  
pp. 127-133 ◽  
Author(s):  
F. Teschl ◽  
W. L. Randeu ◽  
R. Teschl
Keyword(s):  
Cross Section ◽  
Single Scattering ◽  
Dipole Approximation ◽  
Ice Crystals ◽  
Spherical Particles ◽  
Scattering Parameters ◽  
Microwave Scattering ◽  
Millimeter Wavelengths ◽  
Ice Water ◽  
Huge Variety

Abstract. The scattering properties of ice crystals at centimeter and millimeter wavelengths are fundamental for their measurement with radars or radiometers as well as for many other applications in remote sensing. Only the scattering properties of homogeneous spheres can be computed in a mathematically exact way using the Mie theory. Therefore, for many approaches ice crystals and other frozen hydrometeors are approximated by ice spheres that have the same volume as the crystal or hydrometeor – so called equal volume spheres. However, many frozen hydrometeors are non-spherical. They exist in a huge variety of shapes and exhibit different mixtures of ice, water and air. Therefore it is desirable to accurately compute scattering from non-spherical particles in order to clearly understand the effect the shape of a hydrometeor has on its scattering pattern. In this study, single scattering parameters like scattering cross section (Csca) and absorption cross section (Cabs) were calculated for six pristine ice crystals by means of the Discrete Dipole Approximation (DDA). The calculations were carried out for frequencies from 1 GHz to 300 GHz – leading to size parameters of up to 4. The study calculates the scattering parameters for randomly oriented ice crystals and investigates to what extent the exact scattering parameters can differ from an approximation by equal volume spheres.

scholarly journals Microwave scattering parameters of ferro-nano-carbon–composites for tracking range countermeasures

2022 ◽  
Author(s):  
Ashwini P Alegaonkar ◽  
Himanshu Baskey ◽  
Prashant S. Alegaonkar
Keyword(s):  
Electromagnetic Interference ◽  
Carbon Composites ◽  
Scattering Parameters ◽  
Microwave Scattering ◽  
Nano Carbon ◽  
Tracking Range ◽  
Insight Into

Ditching radar seekers at a microwave tracking range is of utmost tactical importance which could be realized by developing insight into designing an effective electromagnetic interference (EMI) shield. We report...

Experimental investigation and modelling of light scattering in a-Si:H solar cells deposited on glass/ZnO:Al substrates

2002 ◽  
Vol 715 ◽  
Author(s):  
J. Krc ◽  
M. Zeman ◽  
O. Kluth ◽  
F. Smole ◽  
M. Topic
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Solar Cells ◽  
Angular Distribution ◽  
Light Scattering ◽  
Optical Model ◽  
Distribution Functions ◽  
Interface Roughness ◽  
Scattering Parameters ◽  
Good Agreement

AbstractThe descriptive scattering parameters, haze and angular distribution functions of textured ZnO:Al transparent conductive oxides with different surface roughness are measured. An approach to determine the scattering parameters of all internal interfaces in p-i-n a-Si:H solar cells deposited on the glass/ZnO:Al substrates is presented. Using the determined scattering parameters as the input parameters of the optical model, a good agreement between the measured and simulated quantum efficiencies of the p-i-n a-Si:H solar cells with different interface roughness is achieved.

Single Image Dehazing by Predicting Atmospheric Scattering Parameters

2020 ◽  
Vol 2020 (1) ◽  
pp. 74-77
Author(s):  
Simone Bianco ◽  
Luigi Celona ◽  
Flavio Piccoli
Keyword(s):  
Reference Image ◽  
Single Image ◽  
Scattering Parameters ◽  
Image Dehazing ◽  
Atmospheric Scattering ◽  
Local Structures ◽  
Full Reference ◽  
Reconstruction Quality ◽  
Single Image Dehazing

In this work we propose a method for single image dehazing that exploits a physical model to recover the haze-free image by estimating the atmospheric scattering parameters. Cycle consistency is used to further improve the reconstruction quality of local structures and objects in the scene as well. Experimental results on four real and synthetic hazy image datasets show the effectiveness of the proposed method in terms of two commonly used full-reference image quality metrics.

Minimization of the volume of reliability tests of the machines under development taking into account the reliability functions for certain types of failures

2020 ◽  
pp. 33-36
Author(s):  
A.S. Ivanov
Keyword(s):  
Random Variables ◽  
Test Time ◽  
Scattering Parameters ◽  
Degradation Failure

A method of minimizing the volume of reliability tests for non-recoverable machines at the stage of their development by increasing the test time and using forced modes is described. Keywords tests, degradation failure, reliability, scattering parameters, random variables [email protected]

Magnetically Induced Depolarization of Microwave Scattering from a Laser-Generated Plasma

2019 ◽  
Vol 12 (3) ◽  
Author(s):  
C.A. Galea ◽  
M.N. Shneider ◽  
A. Dogariu ◽  
R.B. Miles
Keyword(s):  
Microwave Scattering
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