Results 61 to 70 of about 41,349 (201)

Thermal Structure of the Equatorial Topside Ionosphere [PDF]

, 1972
151-153The thermal structure of the equatorial topside ionosphere is theoretically investigated to explain the experimentally observed features, viz. (i) isothermal region in the 400-500 km range, (ii) close coupling of electron and ion temperatures, and
Singh, Risal, Rao, B. C. Narasinga
core  

Validation of NeQuick2 topside TEC using ESA Swarm GNSS data

Ain Shams Engineering Journal
Accurate topside ionosphere–plasmasphere modeling is vital for GNSS. Using Swarm GNSS data, topside TEC is derived to evaluate NeQuick2 from ∼460–20,200 km across solar activity, season, latitude, local time, and hemispheres.
Muhammad Mubasshir Shaikh
doaj   +1 more source

Ion composition and temperature in the topside ionosphere [PDF]

Journal of Geophysical Research, 1967
Particle and energy continuity equations derived and solved by computer method ion composition and plasma temperature measured by Explorer XXII PARTICLE and energy continuity equations derived and solved by computer method for ion composition and plasma temperature measured by Explorer ...
H. G. Mayr, L. H. Brace, G. S. Dunham
openaire   +1 more source

Dayside Polar Cap Aurora and Their Connection to NBZ Currents

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract During northward interplanetary magnetic field (IMF) conditions, magnetic reconnection between the Earth's magnetosphere and the IMF takes place on high latitudes, causing the auroral oval to contract. During those times several auroral structures may appear inside the polar cap, such as cusp aurora, high latitude dayside aurora (HiLDA) and ...
Maria Chloi Katrougkalou, Anita Kullen, Lei Cai, Lorenz Roth, Yongliang Zhang   +4 more
wiley   +1 more source

Expansion and Shrinking of the Martian Topside Ionosphere

, 2019
The observations made by the Mars Atmosphere and Volatile EvolutioN spacecraft in the topside (≥200 km) ionosphere of Mars show that this region is very responsive to the variations of the external (solar extreme ultraviolet flux, solar wind, and ...
Dubinin, E., M. Pätzold, Zelenyi, L., J. E. P. Connerney, O. Vaisberg, Jakosky, B., Connerney, J., McFadden, J., Eparvier, F., L. Zelenyi, Halekas, J. S., M. Fraenz, J. Woch, Woch, J., Vaisberg, O., F. Eparvier, Pätzold, M., Connerney, J. E. P., Halekas, J., E. Dubinin, B. M. Jakosky, Fraenz, M., J. S. Halekas, Jakosky, B. M., J. McFadden, Fränz, M.   +25 more
core   +1 more source

ESA Swarm Satellites Plasma Density Products: Comparison and Validation Against Incoherent Scatter Radars Observations

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The European Space Agency's Swarm mission has provided over a decade of continuous in situ measurements of the topside ionospheric plasma. With the release of various official plasma density products and the development of several calibration methods, selecting the most reliable data set has become an important issue for the scientific ...
Alessio Pignalberi, Artem Smirnov, Chao Xiong, Vladimir Truhlik, Roberta Forte, Michael Pezzopane, Vincenzo Ventriglia, Luca Spogli, Lucilla Alfonsi   +8 more
wiley   +1 more source

A hybrid reconstruction approach for estimating topside ionospheric scale height and its altitudinal variation using Jicamarca ISR measurements

Scientific Reports
In ionospheric research, accurately representing the topside electron density profile is essential for predicting radio wave propagation and mitigating ionospheric effects on communication and navigation systems.
K. Siba Kiran Guru, S. Sripathi, Ram Singh, Rajesh Kumar Barad, Danny Scipion, A. P. Dimri   +5 more
doaj   +1 more source

The applicability of existing topside ionospheric models to the South African region

South African Journal of Science, 2009
The modelling of the electron density profile (Ne) for the topside ionosphere is challenging due to the limited availability of measured data. Over the past few years, a range of approaches to topside ionospheric modelling and representation of the Ne ...
P. Sibanda, L.A. McKinnell
doaj  

ULF wave activity during the 2003 Halloween superstorm: multipoint observations from CHAMP, Cluster and Geotail missions [PDF]

Annales Geophysicae, 2012
We examine data from a topside ionosphere and two magnetospheric missions (CHAMP, Cluster and Geotail) for signatures of ultra low frequency (ULF) waves during the exceptional 2003 Halloween geospace magnetic storm, when Dst reached ~−380 nT. We
G. Balasis, I. A. Daglis, E. Zesta, C. Papadimitriou, C. Papadimitriou, M. Georgiou, M. Georgiou, R. Haagmans, K. Tsinganos   +8 more
doaj   +1 more source

Controlling of the F Region Plasma Structures by the E Region Conductance in the Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract At high latitudes, the E and F regions of the ionosphere are strongly coupled through nearly vertical magnetic field lines. To simultaneously and directly relate the E and F regions' plasma structures, we ran a coordinated conjunction campaign between Swarm satellites and Incoherent Scatter Radar in Tromsø, Norway, during a moderate ...
Yaqi Jin, Magnus F. Ivarsen, Lei Cai, Heikki Vanhamäki, Ilkka Virtanen, Daria Kotova, Luca Spogli, Jaroslav Urbář, Alan Wood, Marcus Pedersen, Anita Aikio, Elisabetta Iorfida, Wojciech J. Miloch   +12 more
wiley   +1 more source