Results 71 to 80 of about 408,077 (211)

Classification of Ionograms Obtained from Vertical Incidence Pulsed Ionospheric Radar (VIPIR)/Dynasonde Ionospheric Radar at Jang Bogo Station, Antarctica

Journal of Astronomy and Space Sciences
The electron density profiles produced from the ionospheric sounding system are traditionally estimated by the inversion procedure based on the image analysis of the observed ionograms. Jang Bogo Vertical Incidence Pulsed Ionospheric Radar (VIPIR) with
Junho Back, Geonhwa Jee, Hyuck-Jin Kwon, Khan-Hyuk Kim, Changsup Lee, Young-Bae Ham, Nikolay Zabotin   +6 more
doaj   +1 more source

Localized electron density enhancements in the high-altitude polar ionosphere and their relationships with storm-enhanced density (SED) plumes and polar tongues of ionization (TOI) [PDF]

Annales Geophysicae, 2011
Events of localized electron density increase in the high-altitude (>3000 km) polar ionosphere are occasionally identified by the thermal plasma instruments on the Akebono satellite.
Y. Kitanoya, T. Abe, A. W. Yau, T. Hori, N. Nishitani   +4 more
doaj   +1 more source

Quiet Time Ionosphere‐Thermosphere Predictability During Sudden Stratospheric Warmings in TIE‐GCM

Space Weather, Volume 24, Issue 11, November 2026.
Abstract We investigate the predictability of the ionosphere‐thermosphere (IT) region during sudden stratospheric warmings (SSWs) by using subseasonal hindcasts in the Community Earth System Model, version 2 with the Whole Atmosphere Community Climate Model (CESM2 [WACCM6]) to force the lower boundary of the TIE‐GCM.
B. C. Martinez, N. M. Pedatella, Xian Lu
wiley   +1 more source

The May 2024 Storm: The Cusps and Dayside Magnetopause in Simulated Soft X‐Rays

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The coronal mass ejection (CME) arriving at Earth on 10 May 2024 caused the most intense geomagnetic storm in the last two decades, resulting in highly unusual cusp and magnetopause dynamics. We simulate soft X‐Ray emission due to solar wind charge exchange with exospheric neutrals to image the global dayside dynamics, focusing on the impact ...
J. Ng, L.‐J. Chen, B. Burkholder, D. Sibeck, F. S. Porter, K. H. Pham, V. G. Merkin, H. Connor, J. W. Bonnell, S. Petrinec, Y. Zou, B. Alterman, G. Cucho‐Padin   +12 more
wiley   +1 more source

Data Assimilation Into a Machine Learning‐Based Emulator of a Global MHD Simulation for Analyzing the Polar Ionosphere

Space Weather
The temporal evolution of the polar ionosphere's electric field distribution can be simulated by a magnetohydrodynamic (MHD) model of the magnetosphere–ionosphere system.
Shin'ya Nakano, Sachin Alexander Reddy, Ryuho Kataoka, Aoi Nakamizo, Shigeru Fujita, Akira Sessai Yukimatu   +5 more
doaj   +1 more source

Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations [PDF]

Annales Geophysicae, 2000
The response of the dayside ionosphere to changes in polarity of the interplanetary magnetic field was observed by two independent techniques. The signatures were seen in the 630.0 nm red-line emission, measured by a meridian scanning photometer at Ny-
S. E. Pryse, S. E. Pryse, S. E. Pryse, A. M. Smith, A. M. Smith, A. M. Smith, L. Kersley, L. Kersley, L. Kersley   +8 more
doaj   +1 more source

Quantifying Nighttime Gravity Wave‐Driven Mesosphere‐Ionosphere Coupling Over CONUS Using NASA AWE Radiance and GNSS TEC Observations

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract We present the first coordinated study of nighttime mesosphere‐ionosphere coupling over the continental United States (CONUS) from January through November 2024 using NASA Atmospheric Waves Experiment (AWE) airglow measurements near 87 km and GNSS Total Electron Content observations near 300 km.
Sreelekshmi Radhakrishnan Girijakumary, Xian Lu   +1 more
wiley   +1 more source

Enhancement of the Nighttime Ocean Cool Skin Effect by Natural Surfactants

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The ocean interface brightness temperature is sensitive to the biologic activity reflected by the chlorophyll‐a concentration (Chla) in the upper layers of the oceans. This is shown using sea surface skin temperatures Tskin retrieved from spectra recorded by the Infrared Atmospheric Sounder Interferometer and collocated measurements of bulk ...
Hugo Bellenger, Virginie Capelle, Jean‐Michel Hartmann   +2 more
wiley   +1 more source

Generation region of polar cusp hiss observed by ISIS satellites [PDF]

, 2000
P(論文)Polar cusp VLF hiss of irregular spectra is observed mainly at geomagnetic invariant latitudes from 74° to 84°, and at geomagnetic local times from 10 to 14 hours.
Ondoh, Tadanori
core   +1 more source

Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure : comparison with the UV auroral oval observed by the HST [PDF]

, 2008
We model the open magnetic field region in Saturn's southern polar ionosphere during two compression regions observed by the Cassini spacecraft upstream of Saturn in January 2004, and compare these with the auroral ovals observed simultaneously in ...
Badman, S. V., Kalegaev, V.v., Cowley, S. W. H., Belenkaya, E. S., Blokhina, M. S.   +4 more
core   +3 more sources