12 articles
Acoustic tomography
Acoustic tomography is a remote-sensing method that reconstructs ocean temperature and currents from sound travel times between moored transducers, proposed by Walter Munk and Carl Wunsch in 1979.
Beam tomography
Beam tomography is a wave-propagation imaging method using beams of finite width, used in seismology to image the Earth's crust and mantle and in helioseismology to image the Sun's interior.
Diffraction tomography
Diffraction tomography is an inverse-scattering imaging method that reconstructs the internal structure of weakly scattering objects from diffracted waves, unlike ray-based tomography, with applications in geophysics, breast ultrasound, and cell imaging.
Equivalent source method
The equivalent source method, also called equivalent sources, is a geophysical technique that fits fictitious sources to gravity or magnetic data for interpolation and continuation.
Geophysical imaging
Geophysical imaging is a family of earth-science methods that reconstructs models of subsurface structures and properties such as seismic velocity, resistivity, and density from field measurements.
Muon tomography
Muon tomography, also called muography, is an imaging technique that uses naturally occurring cosmic-ray muons to see inside large opaque objects such as volcanoes, pyramids, mines, and nuclear reactors.
Seismic interferometry
Seismic interferometry, also known as noise interferometry, is a geophysical method that estimates the Green's function between two receivers by cross-correlating their recordings, introduced to seismology by Jon Claerbout.
Seismic inversion
Seismic inversion is a geophysical method that converts recorded seismic reflection amplitudes, constrained by well logs, into estimates of subsurface properties like velocity, density, and acoustic impedance.
Tensor tomography
Tensor tomography is the reconstruction of a tensor field, such as anisotropic elastic or transport properties, from its integrals along ray paths, generalizing computed tomography's X-ray transform.
Time reversal imaging
Time reversal imaging is a wavefield method that reverses recorded signals and propagates them back through a medium model, refocusing energy on the original source or scatterer.
Wavefield reconstruction
Wavefield reconstruction is a geophysical method that recovers a complete seismic or acoustic wavefield from sparse, irregularly sampled data, a prerequisite for full waveform inversion and least-squares migration.
Wavefield separation
Wavefield separation is a signal-processing method in seismology that decomposes recorded seismic data into components such as upgoing and downgoing waves or P- and S-waves, feeding migration and full-waveform inversion.