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Design of a Linear in Wavenumber Spectrometer
Latin America Optics and Photonics Conference, 2018We describe the optical design of a linear in wavenumber spectrometer that combines a grating and a prism. OpticStudio software was used to validate the performance of the design. High lineartiy in k-space was achived.
Ruiz-Lopera S., Restrepo R.
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The wavenumber shift in SAR interferometry
IEEE Transactions on Geoscience and Remote Sensing, 1994SAR surveys from separate passes show relative shifts of the ground wavenumber spectra that depend on the local slope and the off-nadir angle. The authors discuss the exploitation of this spectral shift for different applications: 1) generation of "low noise" interferograms benefiting phase unwrapping, 2) generation of quick-look interferograms, 3 ...
F. GATELLI +5 more
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HIGH RESOLUTION WAVENUMBER STANDARDS FOR THE INFRARED
Journal of Molecular Spectroscopy, 1996The calibration of high resolution infrared spectra is generally more precise than accurate. This is the case even when they are recorded with Fourier transform interferometers. The present document aims at improving the accuracy of wavenumber measurements in the infrared by recommending a selection of spectral lines as wavenumber standards for ...
Guelachvili, G. +23 more
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Efficient ArcSAR Focusing in the Wavenumber Domain
IEEE Transactions on Geoscience and Remote Sensing, 2022Arc synthetic aperture radar (ArcSAR) is a ground-based remote imaging technology with the ability to cover wide fields of view. However, because its azimuth is formed by scanning angle rotation, the focusing of ArcSAR images is different from classical SAR focusing.
Yuan Zhang +3 more
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Wavenumber surfaces of magnetoatmospheric waves
The Physics of Fluids, 1974Small-amplitude wave motion in a gravitationally stratified atmosphere permeated by a magnetic field consists, for each Fourier component with a certain frequency and horizontal wavenumber, of six quasiplane waves. Their mixture varies with height due to the continual interaction among these quasiplane waves. The simultaneous effects of compressibility,
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Physics of the Earth and Planetary Interiors, 1991
Abstract Seismic wave propagation through an attenuating medium has a unique description in the linear viscoelastic model which, by the correspondence principle, is a direct extension of the elastic model. Horizontal wavenumbers are constant across a horizontal boundary, but the vertical wavenumbers are ambiguously defined when incidence is from a ...
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Abstract Seismic wave propagation through an attenuating medium has a unique description in the linear viscoelastic model which, by the correspondence principle, is a direct extension of the elastic model. Horizontal wavenumbers are constant across a horizontal boundary, but the vertical wavenumbers are ambiguously defined when incidence is from a ...
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The Journal of the Acoustical Society of America, 2015
The modal wavenumber of rectangular, simply supported, isotropic thin plates was theoretically shown to be related to the zeros in the wavenumber spectrum and not to the peaks, resulting in an error between the actual modal wavenumber and location of the wavenumber spectrum peak for low mode orders.
Olivier, Robin +4 more
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The modal wavenumber of rectangular, simply supported, isotropic thin plates was theoretically shown to be related to the zeros in the wavenumber spectrum and not to the peaks, resulting in an error between the actual modal wavenumber and location of the wavenumber spectrum peak for low mode orders.
Olivier, Robin +4 more
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Measurement of wavenumber of wall-thinned plate using spatial local wavenumber filtering
PHM Society Asia-Pacific Conference, 2017The surface of a shell-type structure can generate cracks or wall-thinning due to corrosion, etc. Those can eventually lead to the fracture of the structure, which can trigger enormous fatality and property loss. Thereby, a laser imaging technology on such structures as thin plate structureor piping whose thickness is relatively thin in comparison to ...
To Kang +5 more
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Wavenumber Integration Techniques
2011The wavenumber integration technique is basically a numerical implementation of the integral transform technique for horizontally stratified media described in Sect. 2.4.1. The field solution is in the form of a spectral (wavenumber) integral of solutions to the depth-separated wave equation.
Finn B. Jensen +3 more
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