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Simulated annealing velocity analysis: Automating the picking process
(Society of Exploration Geophysicists, 2021-03)
We have developed an automated method for velocity picking that allows us to estimate appropriate velocity functions for the normal moveout correction of common-depth-point (CDP) gathers, valid for either hyperbolic or ...
Estimation of S-wave velocity profiles at Lima city, Peru using microtremor arrays
(Fuji Technology Press, 2014)
Microtremor exploration was performed around seismic recording stations at five sites in Lima city, Peru in order to know the site amplification at these sites. The Spatial Autocorrelation (SPAC) method was applied to ...
Laboratory measurements of the sedimentation velocity of hexagonal planar ice crystals
(John Wiley & Sons Ltd, 2018-07-23)
New experimental measurements of the falling velocity, size and orientation of individual hexagonal plate-like ice crystals are reported. The measurements were conducted at three different temperatures: −13, −16 and −20 ...
Enhanced diffraction by a rectangular grating made of a negative phase-velocity (or negative index) material
(Elsevier Science, 2005-12)
The diffraction of electromagnetic plane waves by a rectangular grating formed by discrete steps in the interface of a homogeneous, isotropic, linear, negative phase-velocity (negative index) material with free space is ...
Influence of Settling Velocity of Particulate Matter on Ground Level ConcentrationsINFLUÊNCIA DA VELOCIDADE TERMINAL DE PARTÍCULAS EM CONCENTRAÇÕES AO NÍVEL DO SOLO
(Universidade Federal de Santa Maria, 2016)
First surface velocity maps for glaciers of Monte Tronador, North Patagonian Andes, derived from sequential Pléiades satellite images
(International Glaciological Society, 2015-11)
We apply cross-correlation to Pléiades satellite images to generate accurate, highresolution monthly surface velocity maps of Monte Tronador glaciers between March and June 2012. Measured surface displacements cover periods ...
Daytime vertical and zonal velocities from 150‐km echoes: Their relevance to F‐region dynamics
(American Geophysical Union, 2004-09-02)
As it was suggested by Kudeki and Fawcett [1993], and later shown by Woodman and Villanueva [1995], vertical Doppler velocities of daytime 150‐km echoes represent the vertical E × B drift velocities at F region altitudes. ...
A statistical comparison of VHF techniques to study clear-air vertical velocities in the lower atmosphere using the Jicamarca radar
(American Geophysical Union, 1998-11)
We compare two types of VHF vertical velocity measurement techniques using a special configuration of the Jicamarca 50-MHz radar antenna. Zenith (vertically directed single-beam) techniques and spaced antenna (SA) techniques ...