Results 101 to 110 of about 5,383 (243)

Spectral analysis in high frequency radar oceanography [PDF]

, 2006
High Frequency radar systems provide a unique opportunity to measure evolving littoral oceanic dynamics at high temporal and spatial resolution. Backscattered electromagnetic signals from ocean waves are modulated by Bragg resonant scattering.
Middleditch, Andrew
core  

High-frequency ocean radar support for Tsunami Early Warning Systems

Geoscience Letters, 2018
A high-frequency (HF) ocean radar system is a shore-based remote sensing system to simultaneously monitor ocean surface currents, waves and wind far beyond the horizon.
Anna Dzvonkovskaya, Leif Petersen, Thomas Helzel, Matthias Kniephoff   +3 more
doaj   +1 more source

EU Space Law and Earth's Boundaries: Integrating Environmental Impact Assessment and Corporate Due Diligence

Global Policy, EarlyView.
ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley   +1 more source

Interhemispheric asymmetries in the occurrence of magnetically conjugate sub-auroral polarisation streams [PDF]

, 2005
Earthward injections of energetic ions and electrons mark the onset of magnetospheric substorms. In the inner magnetosphere (L∼4), the energetic ions drift westward and the electrons eastward, thereby enhancing the equatorial ring current.
Parkinson, M.L., Frey, H.U., H. U. Frey, Ye, H., Parkinson, M. L., Kikuchi, T., Dyson, P. L., M. L. Parkinson, Milan, S.E., T. K. Yeoman, M. Pinnock, Yeoman, T. K., Wild, J.A., J. C. Devlin, Devlin, J. C., Milan, S. E., Lester, M., Wild, J. A., H. Ye, J. A. Wild, M. Lester, Pinnock, M., T. Kikuchi, S. E. Milan, Devlin, J.C., Frey, H. U., Yeoman, T.K.   +26 more
core   +1 more source

The Turbulence Properties of 150‐km Echoes in the Lower Ionosphere

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The valley region ionosphere spans from approximately 120–200 km in altitude, and hosts a wide range of plasma, neutral, and solar interactions that create and maintain the ionosphere. In this region a ubiquitous and mysterious source of radar echoes called “150‐km echoes” has been observed since the 1960s.
William J. Longley, Lindsay V. Goodwin, Chirag R. Skolar, Nicholas M. Pedatella   +3 more
wiley   +1 more source

Combining incoherent scatter radar data and IRI-2007 to monitor the open-closed field line boundary during substorms [PDF]

, 2010
The size of the polar cap is very important for understanding the substorm process as well as reconnection rates in general. In this work we build on previous studies which use a combination of European Incoherent Scatter radar (EISCAT) electron ...
Wild, J.A., A. Senior, Senior, A., Milan, S.E., S. E. Milan, Woodfield, E.E., Kavanagh, A.J., A. J. Kavanagh, E. E. Woodfield, J. A. Wild   +9 more
core   +1 more source

Built‐In Interfacial Electric Field in Hydroxyl‐Terminated MXene/COF Heterostructures for Enhanced Solid‐State Supercapacitors

Advanced Functional Materials, Volume 36, Issue 44, 1 June 2026.
Hydroxyl‐terminated MXene is integrated with a redox‐active covalent organic framework through electrostatic self‐assembly followed by hydrothermal treatment to construct MXene/COF heterostructures with a built‐in interfacial electric field. Termination‐controlled interfacial electronic modulation induces charge redistribution and favorable band ...
Cheru Fekadu Molla, Birhanu Bayissa Gicha, Boka Fikadu Banti, Indra Memdi Khoris, Jaebeom Lee   +4 more
wiley   +1 more source

The influence of magnetospheric substorms on SuperDARN radar backscatter [PDF]

, 2008
The SuperDARN ionospheric radar network is a leading tool for investigating the near-Earth space environment. However, reductions in ionospheric backscatter have been reported during magnetospheric substorms.
J. A. Wild (7591442), Wild, James A., Grocott, A., Adrian Grocott (7590026)   +3 more
core  

Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars [PDF]

, 2002
International audienceWe performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the ...
Milan, S. E., N. Sato, T. Iyemori, T. Iyemori (7616135), Woodfield, E.E., Lester, M., A. S. Yukimatu, A. S. Yukimatu (7614353), M. Lester, N. Sato (7606136), Milan, S.E., M. Lester (7589660), K. Hosokawa, S. E. Milan, Yukimatu, A. S., Iyemori, T., K. Hosokawa (7606139), Hosokawa, K., E. E. Woodfield (7590071), E. E. Woodfield, Sato, N., Yukimatu, A.S., S. E. Milan (7594526), Woodfield, E. E.   +23 more
core   +1 more source

Simultaneous observations of noctilucent clouds and polar mesosphere summer echoes at Syowa Station, Antarctica

Antarctic Record, 2013
This paper reports simultaneous observations of visible noctilucent clouds (NLC) and polar mesosphere summer echoes (PMSE) at Syowa Station (69°01′S, 38°61′E) in Antarctica. During a 1.5 h interval from 2000 to 2130 UT (2300 to 0030 LT) on Feb. 11, 2009,
Keisuke Hosokawa, Yasuo Takeda, Tadahiko Ogawa, Akira Kadokura, Akira Sessai Yukimatu, Natsuo Sato   +5 more
doaj   +1 more source