Manipulation of main lobe number and azimuth angle of terahertz-transmitted beams by matrix-form-coding metasurface

2019 ◽  
Vol 125 (9) ◽  
Author(s):  
Bo Fang ◽  
Xun Bie ◽  
Zhigang Yan ◽  
Haiyong Gan ◽  
Chenxia Li ◽  
...  
Keyword(s):  
Azimuth Angle ◽  
Matrix Form ◽  
Main Lobe

Ensemble estimation of polarization ellipse parameters

2007 ◽  
Vol 463 (2088) ◽  
pp. 3375-3394 ◽  
Author(s):  
A.T Walden ◽  
T Medkour
Keyword(s):  
Angular Distribution ◽  
Standard Deviation ◽  
Aspect Ratio ◽  
Plane Wave ◽  
Wave Field ◽  
Covariance Matrix ◽  
Time Instant ◽  
Azimuth Angle ◽  
Ensemble Estimation ◽  
Plane Wave Field

An ellipse describes the polarized part of a partially polarized quasi-monochromatic plane wave field. Its azimuth angle and aspect ratio are functions of the elements of the covariance matrix associated with the polarized part at a particular time instant. Given an ensemble of K independent samples at that time, the distributions of the estimators of these parameters are derived. The estimation is thus based on a sample ensemble at any time, and does not assume temporal stationarity. Additionally, the azimuth angle estimator has an angular distribution so that non-standard statistical methods are needed when deriving its mean and standard deviation.

Determination of optimum tilt and azimuth angle of BiSPVT system along with its performance due to shadow of adjacent buildings

Solar Energy ◽  
2021 ◽  
Vol 215 ◽  
pp. 206-219
Author(s):  
Somil Yadav ◽  
Caroline Hachem-Vermette ◽  
Sarat Kumar Panda ◽  
G.N. Tiwari ◽  
Smruti Sourava Mohapatra
Keyword(s):  
Azimuth Angle ◽  
Adjacent Buildings

Study on the Location Method Based on Seismic Wave Detection

2012 ◽  
Vol 229-231 ◽  
pp. 2038-2041 ◽  
Author(s):  
Chao Xiong ◽  
Bing Wen Zhang ◽  
Li Zhang ◽  
Chun Ting Ma
Keyword(s):  
High Precision ◽  
Seismic Wave ◽  
Azimuth Angle ◽  
Time Delay Estimation ◽  
Delay Estimation ◽  
Location Method ◽  
Wave Detection ◽  
Seismic Sensors ◽  
Array Structure ◽  
Square Array

A location method based on seismic wave detection was put forward. The seismic wave was collected by high-precision seismic sensors which were set as five-element-square-array structure. The distance and azimuth angle were acquired according to the time delay estimation between each sensor. The result of experiment shows that the location method is effective and has a high precision.

Application of RTM 3D angle gathers to wide-azimuth data subsalt imaging

Geophysics ◽  
2011 ◽  
Vol 76 (5) ◽  
pp. WB175-WB182 ◽  
Author(s):  
Yan Huang ◽  
Bing Bai ◽  
Haiyong Quan ◽  
Tony Huang ◽  
Sheng Xu ◽  
...  
Keyword(s):  
Model Updating ◽  
Velocity Model ◽  
Azimuth Angle ◽  
Reverse Time ◽  
Reverse Time Migration ◽  
Data Set ◽  
Additional Information ◽  
Time Migration ◽  
Reflection Angle ◽  
Subsalt Imaging

The availability of wide-azimuth data and the use of reverse time migration (RTM) have dramatically increased the capabilities of imaging complex subsalt geology. With these improvements, the current obstacle for creating accurate subsalt images now lies in the velocity model. One of the challenges is to generate common image gathers that take full advantage of the additional information provided by wide-azimuth data and the additional accuracy provided by RTM for velocity model updating. A solution is to generate 3D angle domain common image gathers from RTM, which are indexed by subsurface reflection angle and subsurface azimuth angle. We apply these 3D angle gathers to subsalt tomography with the result that there were improvements in velocity updating with a wide-azimuth data set in the Gulf of Mexico.

A simple approach to determine the polarization coefficient at synchrotron radiation stations

2014 ◽  
Vol 47 (4) ◽  
pp. 1449-1451 ◽  
Author(s):  
Sergei Sulyanov ◽  
Pavel Dorovatovskii ◽  
Hans Boysen
Keyword(s):  
Synchrotron Radiation ◽  
Simple Procedure ◽  
Glass Plate ◽  
Intensity Variation ◽  
Incident Beam ◽  
Azimuth Angle ◽  
Area Detector ◽  
Ccd Detector ◽  
Diffraction Angle ◽  
Polarization Coefficient

A simple procedure for the measurement of the degree of linear polarization at a synchrotron radiation station is described. The diffraction pattern from a glass plate set perpendicular to the incident beam is registered using a two-dimensional area detector. The intensity variation along the azimuth angle ρ at a constant diffraction angle is fitted to the theoretical cos2ρ dependence. The results of measurements performed at a synchrotron radiation station with a CCD detector on the beam from a bending magnet are presented.

Optimization of azimuth angle settings in polarizer–compensator–sample–analyzer off-null ellipsometry

2003 ◽  
Vol 42 (1) ◽  
pp. 38 ◽  
Author(s):  
Guoliang Wang ◽  
Hans Arwin ◽  
Roger Jansson
Keyword(s):  
Azimuth Angle
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