Results 121 to 130 of about 974 (171)

Sedimentology of plastics: state of the art and future directions. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Hampson G   +5 more
europepmc   +1 more source

Formation of breccia pipes associated with a hydrogen-rich hydrothermal system on the east Caroline plate in the West Pacific. [PDF]

open access: yesSci Adv
Xiao Y   +13 more
europepmc   +1 more source

Precise Multibeam Acoustic Bathymetry

Marine Geodesy, 1999
The maximum error in ocean depth measurement as specified by the International Hydrographic Organization is 1% for depth greater than 30m. Current acoustic multibeam bathymetric systems used for depth measurement are subject to errors from various sources which may significantly exceed this limit. The lack of sound speed profiles may be one significant
exaly   +2 more sources

Seamless splicing of digital multibeam bathymetry maps

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
For the problem of splicing two depth maps measured by multibeam bathymetry system. the seafloor is measured according to multibeam principle, and the data obtained are corrected by five factors. Further, Edge beams of two maps are trimmed to align. On this basis, depths of two maps are added using inverse distance weight(IDW) in their overlap region ...
Jia-cheng Yu, Xue-qiang Xu
exaly   +2 more sources

Multibeam bathymetry of glaciated terrain off southwest Newfoundland

Marine Geology, 1997
Abstract Inner St. George's Bay, Newfoundland, was mapped in 1988 using a suite of conventional geophysical and sampling tools. The Quaternary deposits, sea-level history, and Holocene littoral sediments were described in a series of papers. In 1995, part of the previously mapped area was imaged using a multibeam mapping system.
John Shaw
exaly   +2 more sources

Coastal Bathymetry from Hyperspectral Remote Sensing Data: Comparisons with High Resolution Multibeam Bathymetry

Marine Geophysical Researches, 2006
We present a large-scale quantitative test of a hyperspectral remote-sensing reflectance algorithm. We show that coastal bathymetry can be adequately derived through model inversions using data from the Airborne Visible-Infrared Imaging Spectrometer instrument.
David J Mallinson, Kendall L Carder
exaly   +3 more sources

3D seismic-derived bathymetry: a quantitative comparison with multibeam data

Geo-Marine Letters, 2019
This study compares bathymetry extracted from 3D seismic data at two Australian study sites of differing morphological complexities to two sources of collocated multibeam data: 50-m and 5-m multibeam digital bathymetric models (DBMs). Seafloor horizons are extracted from the 3D seismic data and converted to depth using sound velocity profiles collected
Hannah Power, Samantha Clarke
exaly   +2 more sources

Bathymetry degradation causes for frequency modulated multibeam echo sounders

2012 Oceans, 2012
FM-modulated signals with pulse compression are used in the new generation of bathymetric multibeam echo sounders in order to reach higher swath while keeping a high resolution. However, the expected performances are not reached on field data. This article discusses two different effects impacting the bathymetric measurement (Doppler effect and ...
Vincent, Pauline   +4 more
openaire   +2 more sources

The Geisha Guyots: Multibeam bathymetry and morphometric interpretation

Journal of Geophysical Research: Solid Earth, 1984
Multibeam bathymetric charts (100 fm = 183 m contour interval) are presented and analyzed for the ∼1100‐km‐long, 120° trending Geisha chain of eight guyots and at least 13 other seamounts (>1 km height) in the northwest Pacific; these guyots are compared with 23 others in the North Pacific.
Peter R. Vogt, N. Christian Smoot
openaire   +1 more source

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