Results 141 to 150 of about 15,810 (162)
Some of the next articles are maybe not open access.
Seismic interferometry, with applications in passive reflection imaging
The Journal of the Acoustical Society of America, 2005Seismic interferometry is the process of generating new seismic responses by crosscorrelating seismic observations at different receiver locations. A first version of this principle was derived in 1968 by Claerbout, who showed that the reflection response of a horizontally layered medium can be synthesized from the autocorrelation of its transmission ...
Kees Wapenaar, Deyan Draganov
openaire +1 more source
Inspecting tidal signals observed by passive image interferometry
2023Solid Earth is subjected to nanostrain tidal deformations caused by gravitational attraction of the Moon and Sun. This causes periodic deformations of imperceptible fractures in the shallow rock that likely result into subtle variations of seismic velocities.
Müller, J., Eulenfeld, T., Wegler, U.
openaire +2 more sources
Monitoring a volcano with passive image interferometry
The Journal of the Acoustical Society of America, 2007Ambient seismic noise has been used successfully as a source of information for structural investigations. Ballistic surface as well as body waves were reconstructed by correlation of noise and used in tomographic studies. In these cases it is of course assumed that the medium under study is stationary, i.e., that the reconstructed Green’s function ...
Christoph Sens-Schönfelder +1 more
openaire +1 more source
Three-dimensional imaging spectrometry by fully passive interferometry
Optical Review, 2012We have developed a method to obtain a set of spectral components of three-dimensional (3D) images for a spatially incoherent, polychromatic light source distribution by a fully passive interferometric technique. The principle of the method is based on the measurement of a five-dimensional (5D) spatial coherence function and signal processing including
Masumi Sasamoto, Kyu Yoshimori
openaire +1 more source
Target-oriented Imaging Using Active and Passive Interferometry
78th EAGE Conference and Exhibition 2016, 2016Target oriented imaging uses seismic interferometry to suppress overburden effects, improving resolution and image quality. Interferometry can be used to construct data that can be processed by standard imaging algorithms or it can be included as part of the depth imaging operator.
M. Karrenbach, S. Cole
openaire +1 more source
Passive Bistatic Sar Imaging and Interferometry by Using Satellite Digital TV Signal
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019In this study, we used the digital television signal broadcasted by geostationary satellite for passive bistatic synthetic aperture radar (SAR) imaging and interferometry applications. A prototype system was designed and fabricated with commercial-off-the-shelf (COTS) components.
Weike Feng +4 more
openaire +1 more source
Proceedings, 2015
I propose a direct migration method for passive seismic data based on a reverse time migration combined with a concept of the seismic interferometry. The subsurface image is obtained by three steps in this method which is recognized as the seismic interferometry in the image domain; the first is model-based wavefield extrapolation of time-windowed ...
Kazuya Shiraishi
exaly +2 more sources
I propose a direct migration method for passive seismic data based on a reverse time migration combined with a concept of the seismic interferometry. The subsurface image is obtained by three steps in this method which is recognized as the seismic interferometry in the image domain; the first is model-based wavefield extrapolation of time-windowed ...
Kazuya Shiraishi
exaly +2 more sources
Passive seismic interferometry for reflection imaging & monitoring
2017Passive seismics is the set of applications that endeavours the exploration of theEarth’s mechanical properties using naturally occurring sources in the subsurface.Conventional imaging of the subsurface is achieved with the aid of reflectionsurveys of body waves from the surface.
openaire +3 more sources
Journal of Geophysical Research: Solid Earth, 2009
Passive Image Interferometry (PII) is a seismological method employing ambient seismic noise to monitor the temporal evolution of mean shear wave velocity within the Earth. First, the elastic Green's tensor between two seismometers is computed from the cross correlation of seismic noise recorded during a certain period.
Wegler, U. +4 more
openaire +3 more sources
Passive Image Interferometry (PII) is a seismological method employing ambient seismic noise to monitor the temporal evolution of mean shear wave velocity within the Earth. First, the elastic Green's tensor between two seismometers is computed from the cross correlation of seismic noise recorded during a certain period.
Wegler, U. +4 more
openaire +3 more sources
Monitoring a CO2-Storage site with Passive Image Interferometry
2013In seismology, Passive Image Interferometry (PII), based on ambient seismic noise, can be used to detect small temporal changes in the propagation of the seismic wavefield. As these changes can be related to changes of elastic properties in the propagation medium, PII can be used to observe dynamic processes in the earth’s crust.
Gassenmeier, M. +2 more
openaire +1 more source