Results 71 to 80 of about 1,046 (220)
Effect of Field Line Torsion on the Polarization of ULF Waves
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract In this paper we suggest a simple modification of the dipole magnetic field which introduces field‐aligned currents and torsion to the field lines. The resulting field lines are not contained in the meridional planes and have resemblance to the geomagnetic field lines in the dawn and dusk flanks of the magnetosphere. We analyze polarization of
K. Kabin, A. W. Degeling, R. Rankin
wiley +1 more source
Comparison of HF radar measurements with Eulerian and Lagrangian surface currents
, 2015 High-frequency (HF) radar-derived ocean currents are compared with in situ measurements to conclude if the radar observations include effects of surface waves that are of second order in the wave amplitude.
Rohrs, J. +4 more
core +1 more source
Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.Abstract Water status, water dynamics, and ecohydrological resilience of a protected German beech forest during the 2018–2020 multi‐year drought are assessed using over six years of multi‐frequency remote sensing data, integrating active, passive, and optical sensors with varying canopy penetration depths, highlighting the importance of monitoring ...
Florian M. Hellwig +10 more
wiley +1 more source
Signal sampling impacts on HF radar wave measurement
, 2009 Averaging is required for the measurement of ocean surface wave spectra and parameters with any measurement system in order to reduce the variance in the estimates. Sampling theory for buoy measurements is well known.
Wyatt, L.R. +5 more
core +1 more source
Introducing Reflected GNSS TEC Data Into ANCHOR Ionospheric Data Assimilation Model
Space Weather, Volume 24, Issue 5, May 2026.Abstract ANCHOR is a novel data assimilation (DA) algorithm developed at the U.S. Naval Research Laboratory to improve ionospheric nowcasting by increasing accuracy and decreasing computational cost. As a parameterized DA model, ANCHOR represents the ionosphere using physical parameters such as the F2 layer peak (Nm $Nm$F2), which characterizes a ...
Brenna Royersmith +5 more
wiley +1 more source
The Big Data Processing of HF Sky-Wave Radar Sea Echo for Detection of Sea Moving Targets
, 2017 A high-frequency (HF) sky-wave radar always monitoring large area of sea surface, for detecting sea surface moving objects, there must be big data waiting to be processed.
Lixin Guo +4 more
core +1 more source
IET Radar, Sonar & NavigationVirtual aperture extension of small aperture array has attracted wide attention in high‐frequency surface wave radar (HFSWR). A biologically inspired coupled (BIC) system is employed to virtually extend the array aperture.
Hongbo Li +4 more
doaj +1 more source
Japan Tsunami Current Flows Observed by HF Radars on Two Continents
Remote Sensing, 2011 Quantitative real-time observations of a tsunami have been limited to deep-water, pressure-sensor observations of changes in the sea surface elevation and observations of sea level fluctuations at the coast, which are essentially point measurements ...
Toshiyuki Awaji +6 more
doaj +1 more source
Wind Turbine Clutter Mitigation in Coastal UHF Radar
The Scientific World Journal, 2014 Coastal UHF radar provides a unique capability to measure the sea surface dynamic parameters and detect small moving targets, by exploiting the low energy loss of electromagnetic waves propagating along the salty and good conducting ocean surface.
Jing Yang +4 more
doaj +1 more source
Key Challenges in True Multistatic OTH Radar Concepts based on HF-Radar in iFURTHER
The system concept of a multistatic network of collaborative high frequency (HF) over-the-horizon (OTH) radar nodes has been proposed and is being tested in the European Union-funded study iFURTHER.
Bok, Dominik +12 more
core +1 more source