Results 41 to 50 of about 1,740 (184)

Ocean Surface Current Observation with a Dual Monopole‐Cross‐Loop Antenna Array

International Journal of Antennas and Propagation, Volume 2017, Issue 1, 2017., 2017
The high‐frequency radars (HFRs) receiving the sea echoes backscattered from the fluctuating ocean surface to remotely sense ocean surface currents are a popular and powerful tool in oceanic observation. Dominant error source in current measurement for HFR systems has been recognized to be the direction of arrival (DOA) determination of the sea echoes.
Yeping Lai, Hao Zhou, Yuming Zeng, Biyang Wen, Amerigo Capria   +4 more
wiley   +1 more source

Introduction to Coastal HF Maritime Surveillance Radars

Polish Maritime Research, 2019
This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars, such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be
Ilcev Dimov Stojce
doaj   +1 more source

Open Vehicular Data Interfaces for In-Car Context Inference [PDF]

, 2009
In this paper, we present a concept for an open vehicular data interface and describe it's components and architecture. We discuss the enabled applications in the context of advanced driver assistance systems with a focus on humanmachine interfaces ...
Frank, Korbinian, Hermosilla Galceran, Daniel, Kranz, Matthias, Weber, Eduard   +3 more
core   +1 more source

High frequency (HF) radar detection of the weak 2012 Indonesian tsunamis [PDF]

, 2012
We report here on the observation and offline detection of the weak tsunamis generated by earthquakes near Indonesia on 11 April 2012 using radar systems and tide gauges on the coasts of Sumatra and the Andaman Islands.
Barrick, D, Diposaptono, S, Isaacson, J, Jena, BK, Kumar, TS, Lipa, B, Nyden, B, Rajesh, K   +7 more
core   +2 more sources

Two‐Dimensional River Flow Patterns Observed with a Pair of UHF Radar System

International Journal of Antennas and Propagation, Volume 2017, Issue 1, 2017., 2017
A pair of ultrahigh‐frequency (UHF) radars system for measuring the two‐dimensional river flow patterns is presented. The system consists of two all‐digital UHF radars with exactly the same hardware structure, operating separately at 329–339 MHz and 341–351 MHz.
Yidong Hou, Biyang Wen, Yonghuai Yang, Jing Yang, Caijun Wang, Diego Masotti   +5 more
wiley   +1 more source

Estimating traveling ionospheric disturbance propagation direction and speed using bistatic high-frequency oceanographic radars

Journal of Space Weather and Space Climate
The purpose of this investigation is to demonstrate how observations from a network of Coastal Ocean Dynamics Applications Radars (CODARs) can be used to derive the parameters of a traveling ionospheric disturbance (TID) in the mid-latitudes.
Markowski Danielle G., Kaeppler Stephen R., Pepper Andrew M., Coleman Lawrence F.   +3 more
doaj   +1 more source

Mixing and phytoplankton dynamics in a submarine canyon in the West Antarctic Peninsula

Journal of Geophysical Research: Oceans, Volume 121, Issue 7, Page 5069-5083, July 2016., 2016
Abstract Bathymetric depressions (canyons) exist along the West Antarctic Peninsula shelf and have been linked with increased phytoplankton biomass and sustained penguin colonies. However, the physical mechanisms driving this enhanced biomass are not well understood. Using a Slocum glider data set with over 25,000 water column profiles, we evaluate the
Filipa Carvalho, Josh Kohut, Matthew J. Oliver, Robert M. Sherrell, Oscar Schofield   +4 more
wiley   +1 more source

Hindcasting and Forecasting of Surface Flow Fields through Assimilating High Frequency Remotely Sensing Radar Data

Remote Sensing, 2017
In order to improve the forecasting ability of numerical models, a sequential data assimilation scheme, nudging, was applied to blend remotely sensing high-frequency (HF) radar surface currents with results from a three-dimensional numerical, EFDC ...
Lei Ren, Michael Hartnett
doaj   +1 more source

Attractive Lagrangian Features in the Mid‐Atlantic Bight: Using Lagrangian Coherent Structures to Describe Seasonal and Interannual Changes in Circulation

Journal of Geophysical Research: Oceans, Volume 130, Issue 10, October 2025.
Abstract Coastal ocean dynamics are complex with influences from freshwater input, alongshore flows, offshore slope water intrusions, and overlapping mixing and stratification processes. This complexity makes it difficult to elucidate patterns in observed coastal circulation important to our understanding of natural and anthropogenic marine ecosystem ...
Jacquelyn M. Veatch, Hugh Roarty, Matthew J. Oliver, Erick Fredj, Josh T. Kohut   +4 more
wiley   +1 more source

Gap Filling of the CALYPSO HF Radar Sea Surface Current Data through Past Measurements and Satellite Wind Observations

International Journal of Navigation and Observation, Volume 2016, Issue 1, 2016., 2016
High frequency (HF) radar installations are becoming essential components of operational real‐time marine monitoring systems. The underlying technology is being further enhanced to fully exploit the potential of mapping sea surface currents and wave fields over wide areas with high spatial and temporal resolution, even in adverse meteo‐marine ...
Adam Gauci, Aldo Drago, John Abela, Aleksandar Dogandzic   +3 more
wiley   +1 more source