Results 241 to 250 of about 35,359 (303)

Emerging Device Applications From Strong Light–Matter Interactions in 2D Materials

open access: yesAdvanced Science, EarlyView.
Two‐dimensional semiconductors enable extremely compact optoelectronic devices such as solar cells, sensors, LEDs, and lasers. Their strong light–matter interactions allow efficient light emission, detection, and energy conversion. This review article discusses the recent progress in integrating these materials with optical cavities and nanostructures ...
Janani Archana K   +7 more
wiley   +1 more source

Mapping of Western Valles Marineris Light-Toned Layered Deposits and Newly Classified Rim Deposits. [PDF]

open access: yesJ Geophys Res Planets
Mishev IG   +7 more
europepmc   +1 more source

Peculiarities of the inverse problems of vertical radio sounding of the ionosphere

open access: closedAdvances in Space Research, 1988
Abstract At the interpretation of ionograms (obtained by ground-based or satellite soundings) in terms of electron density, or at that of absorption measurements in terms of an effective electron collision frequency or at that of Doppler measurements in terms of plasma motions, problems arise which might be seen as comparable in character.
N.P. Danilkin   +2 more
openaire   +2 more sources

Validation of GPS Ionospheric Radio Occultation results onboard CHAMP by Vertical Sounding Observations in Europe

open access: closed, 2005
Ionospheric radio occultation (IRO) measurements have a big potential for monitoring the ionospheric behavior on global scale for now- and forecasting the ionospheric impact on radio systems. In this article we validate the retrieved vertical electron density profiles (EDPs) derived from IRO measurements onboard CHAMP by using vertical sounding ...
Norbert Jakowski   +6 more
openaire   +2 more sources

Ionospheric response to winter stratosphere/lower mesosphere jet stream in the Northern Hemisphere as derived from vertical radio sounding data

open access: closedJournal of Atmospheric and Solar-Terrestrial Physics, 2018
Abstract We study the effects of the middle atmosphere dynamics on the mid-latitude and subauroral ionosphere during the winter jet stream that occurred at the stratosphere/lower mesosphere heights in the Northern Hemisphere over 2008–2013. The used ionospheric data were obtained from measurements taken at the vertical sounding ionosonde chain ...
M.A. Chernigovskaya   +9 more
openaire   +2 more sources

The effects of powerful oblique radio transmission on the ionosphere on vertical sounding data

open access: closedJournal of Atmospheric and Solar-Terrestrial Physics, 1997
Abstract Results of experiments measuring the effects of a powerful oblique HF radio transmission on the ionosphere are described. In one experiment carried out in 1991 on a longitudinal path in the south-west part of the U.S.A., additional traces were found on vertical sounding (VS) ionograms generated by an ionosonde located near the mid-point of ...
G.S. Bochkarev   +2 more
openaire   +2 more sources

A comparison of the thermospheric wind dynamics using transionospheric and vertical incidence radio sounding data

open access: closedAdvances in Space Research, 1996
Abstract In Nov 1990 in Irkutsk (52°N, 102°E), within the Super WAGS Program, measurements were made of parameters of motion of travelling ionospheric disturbances (TID's) at ionospheric heights using two measuring techniques for the Doppler shift of frequency and angles of arrival at vertical-incidence radio sounding at 2.6–6.4MHz and reception of ...
E.L. Afraimovich   +2 more
openaire   +2 more sources

Time variations of polarisation characteristics of HF radio signals during vertical and near-vertical incedence sounding of the ionosphere

open access: closed2020 7th All-Russian Microwave Conference (RMC), 2020
The paper describes the equipment of the monostatic chirp ionosonde “Ionosonde-MS” upgraded in order to perform routine polarization measurements during vertical incidence and near-vertical incidence sounding of the mid-latitude ionosphere over the Asian part of Russia using a continuous chirp signal.
Vladimir I. Kurkin   +2 more
openaire   +2 more sources

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