Results 91 to 100 of about 195,954 (260)

AVALIAÇÃO DA PRECISÃO VERTICAL DOS MODELOS SRTM PARA A AMAZÔNIA [PDF]

open access: yesRevista Brasileira de Cartografia, 2006
This paper describes an experiment for evaluation of the vertical precision of the SRTM’s DEM of the C band of interferometric SAR which was compared with the Topography Chart’s DEM 1:100 000 and the GPS field points.
Leonardo Castro de Oliveira   +2 more
doaj  

A Comparison of Delayed Self-Heterodyne Interference Measurement of Laser Linewidth Using Mach-Zehnder and Michelson Interferometers

open access: yesSensors, 2011
Linewidth measurements of a distributed feedback (DFB) fibre laser are made using delayed self heterodyne interferometry (DHSI) with both Mach-Zehnder and Michelson interferometer configurations.
Simon Fleming   +6 more
doaj   +1 more source

Noise assisted Ramsey interferometry

open access: yes, 2013
I analyze a metrological strategy for improving the precision of frequency estimation via Ramsey interferometry with strings of atoms in the presence of correlated dephasing.
Dorner, U.
core   +1 more source

Optical Fiber-Based MR-Compatible Sensors for Medical Applications: An Overview

open access: yesSensors, 2013
During last decades, Magnetic Resonance (MR)—compatible sensors based on different techniques have been developed due to growing demand for application in medicine.
Emiliano Schena   +4 more
doaj   +1 more source

Portable fiber optic coupled Doppler interferometer system for detonation and shock wave diagnostics [PDF]

open access: yes, 1993
Testing and analysis of shock wave characteristics such as detonators and ground shock propagation frequently require a method of measuring velocity and displacement of the surface of interest. One method of measurement is Doppler interferometry.
Fleming, Kevin J.
core   +1 more source

Measuring Coseismic Deformation With Spaceborne Synthetic Aperture Radar: A Review

open access: yesFrontiers in Earth Science, 2019
In the past 25 years, space-borne Synthetic Aperture Radar imagery has become an increasingly available data source for the study of crustal deformation associated with moderate to large earthquakes (M > 4.0).
John Peter Merryman Boncori
doaj   +1 more source

Quaternionic quantum interferometry [PDF]

open access: yesIn "Quantum Interferometry" ed. by F. De Martini et al., (VCH Publ., 1996) pp. 431-437, 1996
If scattering amplitudes are ordinary complex numbers (not quaternions) there is a universal algebraic relationship between the six coherent cross sections of any three scatterers (taken singly and pairwise). A violation of this relationship would indicate either that scattering amplitudes are quaternions, or that the superposition principle fails ...
arxiv  

Speckle interferometry of asteroids [PDF]

open access: yes
This final report for NASA Contract NAGw-867 consists of abstracts of the first three papers in a series of four appearing in Icarus that were funded by the preceding contract NAGw-224: (1) Speckle Interferometry of Asteroids I.
Drummond, Jack
core   +1 more source

A self-calibration approach for optical long baseline interferometry imaging

open access: yes, 2008
Current optical interferometers are affected by unknown turbulent phases on each telescope. In the field of radio-interferometry, the self-calibration technique is a powerful tool to process interferometric data with missing phase information. This paper
Benson   +20 more
core   +1 more source

Effect of oceanic turbulence on the statistical features of electromagnetic optical beam

open access: yesResults in Physics
This work deals with the intricate problem of electromagnetic optical beam propagation through oceanic turbulence. Using the extended Huygens–Fresnel principle, numerically, the behavior of the degree of cross-polarization (DOCP), electromagnetic degree ...
Hemant Kumar Singh   +2 more
doaj  

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