by Massachusetts Institute of Technology, Woods Hole Oceanographic Institution, Joint Program in Oceanography/Applied Ocean Science and Engineering in Woods Hole, Mass .
Written in English
|Statement||by Robert J. Greaves.|
|Series||MIT/WHOI -- 98-15., MIT/WHOI (Series) -- 98-15.|
|Contributions||Massachusetts Institute of Technology., Woods Hole Oceanographic Institution.|
|The Physical Object|
|Pagination||433 p. :|
|Number of Pages||433|
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole. Seismic Scattering of Low-Grazing-Angle Acoustic Waves Incident on the Seafloor by Robert John Greaves Submitted to the Joint Program in Oceanography, Massachusetts Institute of Technology and Abstract Woods Hole Oceanographic Institution, on June, , in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Seismic scattering of low-grazing-angle acoustic waves incident on the seafloor. By Robert J Greaves. Download PDF (41 MB) Abstract. by Robert John (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution Author: Robert J Greaves. “ Seismic structure of the upper oceanic crust revealed by in situ Q logs,” Geophys. Res. Lett. 24(3), – Google Scholar Crossref; Greaves, R. J. (). “Seismic scattering of low-grazing-angle acoustic waves incident on the seafloor,” Ph.D. thesis, Massachusetts Institute of Technology/Woods Hole Oceanographic Institution.
A numerical scattering chamber is used to study the scattering of low‐grazing‐angle geoacoustic energy from a flat, basaltic seafloor with underlying volume heterogeneities of various length. Naval Research Laboratory Book Contribution NRL/BE/ (U.S. Government Printing Office). Seismic Scattering of Low-Grazing-Angle Acoustic Waves Incident on the Seafloor. Variations in large-scale seafloor slope and average seabed sound speed account for a significant portion of the variations in scattering intensity observed in low-grazing-angle monostatic reverberation. Numerical modeling using a finite-difference solution to the elastic wave equation is used to quantify the effect of these large-scale parameters in interpretations of reverberation data. Estimation of Ice Surface Scattering and Acoustic Attenuation in Arctic Sediments from Long-Range Propagation Data. Acoustic-to-Seismic Coupling at Porous Ground Surfaces. Evaluation of Experimental Techniques for Determining the Plane Wave Reflection Coefficient at the Sea Floor.
The results should have direct application to acoustic sea floor profiling and to the wavefield decomposition of ocean bottom seismometer and seismic cable measurements in removal of multiple reflections (e.g. Sidler & Holliger ). Admittedly, however, real geological interfaces at depth other than the sea floor more often consist of two. Seismic methods involve measuring the propagation of seismic waves through earth materials. In seismic surveys, seismic waves radiate outward from a sound source at the surface, which can be an explosive charge or a mechanical impact. The refraction technique uses a long array of geophones to sense refracted waves, and the reflection technique uses a condensed array near the source to sense. Aaron Micallef, in Developments in Earth Surface Processes, Seismic Reflection Surveying. Seismic reflection is a method of exploration geophysics that provides information about the sub-surface structure of the seafloor. The general principle involves sending artificially generated acoustic waves down the water column and into the seafloor, where the different . the Jackson et al. () theory of seafloor roughness scattering. (2) The high angular resolution bi-linear acoustic array developed at the Geoacoustics Laboratory (GAL) will be used to separate the head waves, sediment volume scattered waves, and scattered waves from rough sea-floor from incident waves. The bistatic.