Results 81 to 90 of about 2,679 (211)

Characterizing the Signals and Backgrounds in a Low Earth Orbiting Cherenkov Detector, and Background Mitigation Strategies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Cherenkov detectors have been used in space for decades to measure Galactic Cosmic Rays (GCRs), Solar Energetic Particles (SEPs) and trapped particles. We present proof‐of‐concept GRAS/Geant4 simulations to both show that a cubic fused silica Cherenkov detector with SiPM in LEO has a good sensitivity to SEP and GCR protons as a function of cut‐
C. S. W. Davis, F. Lei, K. Ryden, C. Dyer, G. Santin, P. Jiggens, M. Heil   +6 more
wiley   +1 more source

Categorizing Characteristic Regions of High‐Latitude Scintillations Using a Combination of Isolation Forest and Neural Network Machine Learning Algorithms

Journal of Geophysical Research: Machine Learning and Computation
Global Positioning System (GPS) scintillations are radio signal fluctuations due to ionospheric structures or irregularities. In this work, we utilize scintillation data to identify the source region (auroral oval vs.
Chintan Thakrar, Nicolas Gachancipa, Kshitija Deshpande, Anna‐Marie Bals, Larry Paxton   +4 more
doaj   +1 more source

Scintillations of the GPS, GLONASS, and Galileo signals at equatorial latitude

Journal of Space Weather and Space Climate, 2014
Small scale ionospheric disturbances can lead to fluctuations of the received satellite signal, so-called signal scintillations. For global navigation satellite systems (GNSS) this reduces the positioning accuracy.
Hlubek Nikolai, Berdermann Jens, Wilken Volker, Gewies Stefan, Jakowski Norbert, Wassaie Mogese, Damtie Baylie   +6 more
doaj   +1 more source

Quiet‐Time Equatorial Ionization Anomaly Reversal Observed by the Satellites of Defense Meteorological Satellite Program (DMSP) and Ionospheric Connection Explorer (ICON)

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We investigated the quiet‐time temporal variations of the Equatorial Ionization Anomaly (EIA) and underlying plasma fountain observed in the topside ionosphere during the various F‐region equatorial E × B drift events recorded by the Jicamarca Incoherent Scatter Radar and simulated by SAMI3.
Ildiko Horvath, Brian C. Lovell
wiley   +1 more source

An Open-Loop Receiver Architecture for Monitoring of Ionospheric Scintillations by Means of GNSS Signals

Applied Sciences, 2019
The quality of positioning services based on Global Navigation Satellite Systems (GNSS) is improving at a fast pace, driven by the strict requirements of a plethora of new applications on accuracy, precision and reliability of the services. Nevertheless,
Nicola Linty, Fabio Dovis
doaj   +1 more source

Quantifying the Impacts of the May 2024 Geomagnetic Storm on Transatlantic Aviation: Rerouting, Delays, and Economic Losses

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The May 2024 geomagnetic storm, one of the most intense events of Solar Cycle 25 to date, caused widespread disruptions in aviation operations, particularly for polar and high‐latitude routes. This study quantifies the operational and economic impacts of the storm on 12 selected transatlantic flights between North America and Europe.
Jie Li, Xiaojian Hu, Dabin Xue, Zhizhao Liu, Qing‐He Zhang, Xueshang Feng   +5 more
wiley   +1 more source

The measurement of ionospheric absorption using extraterrestrial radio waves [PDF]

, 1957
Introduction: The discovery by Jansky in 1932 of the presence of radio waves incident upon the earth from outer space has led to several new methods of studying the earth's upper atmosphere.
Little, C. G.
core  

GPS scintillation and irregularities at the front of an ionization tongue in the nightside polar ionosphere [PDF]

, 2014
In this paper we study a tongue of ionization (TOI) on 31 October 2011 which stretched across the polar cap from the Canadian dayside sector to Svalbard in the nightside ionosphere. The TOI front arrived over Svalbard around 1930 UT. We have investigated
Alfonsi, Alfonsi, Anghel, Baker, Basu, Basu, Basu, Basu, Beach, Briggs, Buchau, Buchau, Béniguel, Béniguel, Carlson, Carlson, Carlson, Carlson, Carlson, Carlson, Carrano, Carrano, Chisham, Coker, Cousins, De Franceschi, Dungey, Forte, Forte, Forte, Foster, Foster, Foster, Franceschi, Fremouw, Gondarenko, Gondarenko, Greenwald, Grocott, Hey, Hosokawa, Hosokawa, Hosokawa, Keskinen, Kintner, Knudsen, Lehtinen, Lepping, Li, Lockwood, Lockwood, Lorentzen, Lorentzen, Lyons, Millward, Mitchell, Moen, Moen, Moen, Moen, Moen, Mushini, Nishimura, Ogilvie, Oksavik, Oksavik, Oksavik, Ossakow, Prikryl, Prikryl, Prikryl, Romano, Romano, Sato, Spogli, Tiwari, Tsunoda, Weber, Weber, Wickwar, Zhang, Zhang, Zou   +82 more
core   +2 more sources

Ionospheric scintillation modeling II. Theoretical study of power spectral densities of ionospheric scintillation

Journal of Space Weather and Space Climate
Anelectromagnetic signal that has passed through a layer of ionospheric irregularities can undergo significant modifications. The Power Spectral Density (PSD) of such a signal can then be rich in information about the medium through which it has passed.
Grégroy Morel, Vincent Fabbro, Olivier Boisot, Laurent Féral   +3 more
openaire   +1 more source

The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang, Weihao Liu, Jingnan Guo, Mikhail Dobynde, Robert F. Wimmer‐Schweingruber   +4 more
wiley   +1 more source