Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Backscatter intensity"”.
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Snowmelt Detection on Alpine Glaciers using Synthetic Aperture Radar Time Series
… detects melt characteristics from Sentinel-1 SAR backscatter intensity time series over glacier surfaces using a classification threshold based on a decrease in backscatter intensity relative to average values across the frozen season. Statistical analysis of the radiometric response to dielectric …
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Improving the Capabilities of Swath Bathymetry Sidescan Using Transmit Beamforming and Pulse Coding
… the SNR, and that transmit beamforming increases backscatter intensity and reduces the intensity of interfering multipaths. The improvement in achievable SNR and the reduction in multipath interference provided by the contributions in this thesis further strengthens the importance of SBS systems …
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Flow structure of an asymmetric large river confluence
… downwelling along the shear layer. Patterns of backscatter intensity, used here as a surrogate for sediment concentration, along with data on surficial water temperatures indicate that the mixing interface between the two rivers corresponds to the position of the shear layer. The research shows …
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Seismic scattering of low-grazing-angle acoustic waves incident on the seafloor
… is based on the hypothesis that observed backscatter signals are produced by a combination of seafloor (interface) scattering and subseafloor (volume) scattering from structure having variations at scale lengths similar to the wavelength of the insonifying acoustic field. Analysis of …
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Seismic scattering of low-grazing-angle acoustic waves incident on the seafloor
… is based on the hypothesis that observed backscatter signals are produced by a combination.of seafloor (interface) scattering and subseafloor (volume) scattering from structure having variations at scale lengths similar to the wavelength of the insonifying acoustic field. Analysis of …
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Mixing and secondary circulation in Juan de Fuca Strait
… to escape predation, they do not act as passive backscatter targets for the Acoustic Doppler Current Profiler. Vertical migration velocities, measured from the backscatter intensity record, reached 0.03 m s⁻¹, suggesting that significant biases in the measured vertical velocity could be …
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Tidal Wetland Inundation and Vegetation Phenology from Space: A Synthesis of Approaches for Characterizing Ecological Status and Inundation Dynamics in Tidal Wetlands with Remote Sensing Observations
… L-band inundation products were developed using backscatter intensity thresholding-based approaches which were derived empirically. Radiometric modeling efforts were also utilized to elucidate changes in scattering mechanisms in support of empirical image analyses. The radiometric modeling …
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Geotechnical Investigation and Characterization of Bivalve-Sediment Interactions
… increase in the standard deviation of the backscatter intensity where the oyster reef was located; (2) the in-situ sediment shear strength increased slightly closer to the oyster reef at the Piankatank River site; (3) samples with a higher oyster density exhibited less uniform particle size …