Results 31 to 40 of about 222,724 (350)

Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

Remote Sensing, 2023
We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products. The main objective of the study is to validate ionospheric data generated at EUMETSAT, such as ionospheric bending angle profiles ...
M. M. Hoque, F. S. Prol, M. Hernandez-Pajares, R. Notarpietro, L. Yuan, G. Olivares-Pulido, V. Graffigna, A. Von Engeln, C. Marquardt   +8 more
openaire   +6 more sources

The International Reference Ionosphere 2012 – a model of international collaboration

, 2014
The International Reference Ionosphere (IRI) project was established jointly by the Committee on Space Research (COSPAR) and the International Union of Radio Science (URSI) in the late sixties with the goal to develop an international standard for the ...
D. Bilitza, D. Altadill, Yongliang Zhang, C. Mertens, V. Truhlík, Phil Richards, L. McKinnell, B. Reinisch   +7 more
semanticscholar   +1 more source

Upper atmospheres and ionospheres of planets and satellites

, 2017
The upper atmospheres of the planets and their satellites are more directly exposed to sunlight and solar wind particles than the surface or the deeper atmospheric layers.
A Bhardwaj, A García Muñoz, A Mahieux, A Pätzold, A Seiff, A Sánchez-Lavega, A-S Wong, AJ Coates, AJ Friedson, AJ Kliore, AJ Kliore, AN Volkov, BM Jakosky, BM Jakosky, CD Parkinson, CGA Smith, CGA Smith, D Grodent, D Snowden, D Snowden, DC Catling, DL Huestis, DM Hunten, DP Hinson, E Lellouch, F González-Galindo, F Herbert, FJ Crary, GF Lindal, GF Lindal, GF Lindal, GM Keating, GMP Schubert, H Feuchtgruber, H Lammer, HB Niemann, ICF Mueller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, J Cui, J O’Donoghue, J-E Wahlund, J. M. Grebowsky, JEP Connerney, JH Waite Jr, JI Moses, JI Moses, JL Bertaux, JL Fox, JL Fox, JL Fox, K Dennerl, KI Matcheva, KL Miller, L Ben-Jaffel, LA Young, LN Fletcher, M Fulchignoni, MC Liang, MF Vogt, MH Rees, MH Stevens, N Mangold, NM Schneider, P Drossart, P Lavvas, P Lavvas, P Lavvas, P Withers, P Withers, P Withers, RJ Vervack Jr, RK Choudhary, RR Meier, RT Clancy, RT Clancy, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RW Schunk, S Miller, S Miller, SG Edgington, SJ Bauer, SV Badman, SW Bougher, SW Bougher, T Koskinen, T Majeed, T Majeed, TD Robinson, TE Cravens, TG Slanger, TH Zurbuchen, TJ Stubbs, TK Greathouse, TL Zhang, TT Koskinen, TT Koskinen, TT Koskinen, V Vuitton, V Vuitton, V. Vuitton, VA Krasnopolsky, W Liu, YH Kim, YH Kim   +109 more
core   +1 more source

Long-Term Changes and Trends in the F2 Layer Critical Frequency over Alma-Ata (Kazakhstan)

Atmosphere
The long-term variability and trends in the F2 layer critical frequency variations over Alma-Ata [43.25 N, 77.92 E] for the period 07.1957–04.2018 are studied using near-midday, near-midnight, and hourly median foF2 values.
Galina Gordiyenko, Artur Yakovets, Yurii Litvinov, Murat Zhiganbayev   +3 more
doaj   +1 more source

Operative center of the geophysical prognosis in Izmiran [PDF]

Annales Geophysicae, 2005
IZMIRAN was founded about 65 years ago with one of the goals of carrying out geomagnetic prognoses. More or less, this activity has been developed during its entire history, but about 6 years ago this aim became sufficiently feasible due to the ...
A. V. Belov, S. P. Gaidash, K. D. Kanonidi, K. K. Kanonidi, V. D. Kuznetsov, E. A. Eroshenko   +5 more
doaj   +1 more source

A possible effect of atmospheric circulation in the daily variation of the earth's magnetic field [PDF]

, 1963
The daily variation of the horizontal intensity of the earth's magnetic field at Honolulu exhibits seasonal features that are not related in a simple way to solar declination.
Wulf, Oliver Reynolds
core   +1 more source

Advancements in Remote Sensing for Monitoring and Risk Assessment of Glacial Lake Outburst Floods

Geosciences
Glacial Lake Outburst Floods (GLOFs) have emerged as a critical threat to high-mountain communities and ecosystems, driven by accelerated glacier retreat and lake expansion under climate change.
Serik Nurakynov, Nurmakhambet Sydyk, Zhaksybek Baygurin, Larissa Balakay   +3 more
doaj   +1 more source

Ionosphere Influenced From Lower-Lying Atmospheric Regions

Frontiers in Astronomy and Space Sciences, 2021
The ionosphere represents part of the upper atmosphere. Its variability is observed on a wide-scale temporal range from minutes, or even shorter, up to scales of the solar cycle and secular variations of solar energy input.
Petra Koucká Knížová, Jan Laštovička, Daniel Kouba, Zbyšek Mošna, Katerina Podolská, Katerina Potužníková, Tereza Šindelářová, Jaroslav Chum, Jan Rusz   +8 more
doaj   +1 more source

Limits on the validity of the thin-layer model of the ionosphere for radio interferometric calibration [PDF]

, 2016
For a ground-based radio interferometer observing at low frequencies, the ionosphere causes propagation delays and refraction of cosmic radio waves which result in phase errors in the received signal.
Bray, Justin D., Martin, Poppy L., Scaife, Anna M. M.   +2 more
core   +2 more sources

Digital Twin‐Based Optimization of Service Availability in LEO Mega Constellations Considering Handover Delays in Open RAN

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram, Luca Feltrin, Mustafa Ozger, Cicek Cavdar   +3 more
wiley   +1 more source