Results 1 to 10 of about 47,269 (283)

Multi-beam Energy Moments of Multibeam Particle Velocity Distributions [PDF]

Journal of Geophysical Research: Space Physics, 2020
High resolution electron and ion velocity distributions, f(v), which consist of N effectively disjoint beams, have been measured by NASA's Magnetospheric Multi-Scale Mission (MMS) observatories and in reconnection simulations.
Eastwood, J. P., Goldman, M. V., Lapenta, G., Newman, D. L.   +3 more
core   +3 more sources

A Universal Method for Identifying and Correcting Induced Heave Error in Multi-Beam Bathymetric Surveys [PDF]

Sensors
Addressing the difficulty of intuitively identifying and effectively correcting induced heave error in multibeam measurements, this paper proposes a two-stage methodology comprising error identification and correction.
Xiaohan Yu, Yang Cui, Jintao Feng, Shaohua Jin, Na Chen, Yuan Wei   +5 more
doaj   +2 more sources

Artificial Reef Detection Method for Multibeam Sonar Imagery Based on Convolutional Neural Networks

Remote Sensing, 2022
Artificial reef detection in multibeam sonar images is an important measure for the monitoring and assessment of biological resources in marine ranching.
Zhipeng Dong, Yanxiong Liu, Yikai Feng   +2 more
exaly   +3 more sources

Protocols for calibrating multibeam sonar [PDF]

The Journal of the Acoustical Society of America, 2005
Development of protocols for calibrating multibeam sonar by means of the standard-target method is documented. Particular systems used in the development work included three that provide the water-column signals, namely the SIMRAD SM2000/90- and 200-kHz ...
Baldwin, Kenneth, Chu, Dezhang, Foote, Kenneth G., Hammer, Terence R., Hufnagle, Lawrence C., Jr., Jech, J Michael, Mayer, Larry A.   +6 more
core   +7 more sources

Precoding in multigateway multibeam satellite systems [PDF]

IEEE Transactions on Wireless Communications, 2016
This paper considers a multigateway multibeam satellite system with multiple feeds per beam. In these systems, each gateway serves a set of beams (cluster) so that the overall data traffic is generated at different geographical areas.
Joroughi, Vahid, Pérez Neira, Ana Isabel, Vazquez, Miguel Angel   +2 more
core   +9 more sources

Simultaneous Multibeam Clustered Phased Arrays Analysis Using Mixed and Multiple Antenna Element Factors [PDF]

Sensors
A novel design strategy for improving the radiative performance of simultaneous multibeam (SMB) phased arrays is addressed. The proposed scheme relies on the adoption of mixed and multiple antenna element factors with a dynamic selection of their ...
Francesco Alessio Dicandia, Simone Genovesi   +1 more
doaj   +2 more sources

Multibeam Electron Diffraction [PDF]

Microscopy and Microanalysis, 2020
Abstract
Xuhao Hong, Steven E. Zeltmann, Benjamin H. Savitzky, Luis Rangel DaCosta, Alexander Müller, Andrew M. Minor, Karen C. Bustillo, Colin Ophus   +7 more
openaire   +5 more sources

Testing the Improvement of Coral Reef Associated Fish Distribution Models Based on Multibeam Bathymetry by Adding Seafloor Backscatter Data

Frontiers in Marine Science, 2021
Demersal fishes constitute an essential component of the continental shelf ecosystem, and a significant element of fisheries catch around the world. However, collecting distribution and abundance data of demersal fish, necessary for their conservation ...
Marcela Montserrat Landero Figueroa, Miles J. G. Parsons, Benjamin J. Saunders, Ben Radford, Iain M. Parnum   +4 more
doaj   +1 more source

Distribution of Methane Plumes on Cascadia Margin and Implications for the Landward Limit of Methane Hydrate Stability

Frontiers in Earth Science, 2021
Nearly 3,500 methane bubble streams, clustered into more than 1,300 methane emission sites, have been identified along the US Cascadia margin, derived both from archived published data and 2011, 2016–2018 dedicated multibeam surveys using co-registered ...
Susan G. Merle, Robert W. Embley, H. Paul Johnson, T.-K. Lau, Benjamin J. Phrampus, Nicole A. Raineault, Lindsay J. Gee   +6 more
doaj   +1 more source

Long-term morphological and sedimentological changes caused by bottom trawling on the northern Catalan continental shelf (NW Mediterranean)

Frontiers in Marine Science, 2023
Bottom trawling is a fishing method that involves towing of nets along the seafloor to catch demersal species. The dragging of trawling gears along the seafloor results in scraping and ploughing of the surficial sediments, leading to the formation of ...
Ruth Durán, Pere Puig, Sarah Paradis, Jorge Guillén, Albert Palanques, Claudio Lo Iacono, Marta Arjona-Camas, Araceli Muñoz, Aaron Micallef, Aaron Micallef   +9 more
doaj   +1 more source