Results 111 to 120 of about 77,336 (163)

Sources of the high latitude ionosphere variability during winter nighttime

Journal of Space Weather and Space Climate
Solar wind energy is continuously deposited in the magnetosphere-ionosphere-thermosphere system, causing significant modifications primarily in the high latitude ionosphere.
Iochem Pelin, Borries Claudia, Tasnim Samira, Wissing Jan Maik, Kusche Jürgen, Aikio Anita, Cai Lei, Virtanen Ilkka, Ellahouny Nada   +8 more
doaj   +1 more source

Midlatitude propagation of VLF to MF waves through nighttime ionosphere above powerful VLF transmitters

, 2013
International audience[1] Midlatitude nighttime observations made by the DEMETER satellite in the very low frequency (VLF) to medium frequency (MF) bands (3 kHz to 3 MHz) have demonstrated the propagation of radio waves from the bottom of ionosphere up ...
Pinçon, Jean-Louis, M. Parrot, F. Lefeuvre, Parrot, Michel, Lefeuvre, François, J. L. Pinçon   +5 more
core   +1 more source

Calibration of Swarm Plasma Densities Overestimation Using Neural Networks

Space Weather
Recent studies have shown that the measurements of Langmuir Probes (LPs) onboard ESA's Swarm mission overestimate ion densities on the nightside by up to 50%. The overestimation is due to the assumption of oxygen‐only plasma for ion density calculations,
Artem Smirnov, Yuri Shprits, Hermann Lühr, Alessio Pignalberi, Chao Xiong   +4 more
doaj   +1 more source

Evaluation of Oblique and Fork Traces in Ionograms as Indicators of MSTIDs and Their Relationship to the Development of Spread-F at European Mid-Latitudes

Atmosphere
Oblique and Fork-shaped traces in ionosonde’s ionograms have been identified as manifestations of nighttime and daytime Medium-Scale Traveling Ionospheric Disturbances (MSTIDs), respectively.
Krishnendu Sekhar Paul, David Altadill, Ankitha Nandakumar, Haris Haralambous, Tobias G. W. Verhulst, Tiju J. Mathew   +5 more
doaj   +1 more source

EFFECTS OF NEUTRAL WINDS ON NIGHTTIME LOW-LATITUDE IONOSPHERE

Chinese Journal of Space Science, 1998
Libo LIU, Jiannan TU, Zongti BAO
openaire   +1 more source

First Lidar Profiling of Meteoric Ca+ Ion Transport From ∼80 to 300 km in the Midlatitude Nighttime Ionosphere

Geophysical Research Letters, 2022
We report a world record of lidar profiling of metallic Ca+ ions up to 300 km in the midlatitude nighttime ionosphere during geomagnetic quiet time.
Xinzhao Chu, Fuju Wu, Zhi-Yuan Wei
exaly   +2 more sources

Deep Ionospheric Hole Created by Sudden Stratospheric Warming in the Nighttime Ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2018
AbstractMultiple observational studies have demonstrated large ionospheric variations during the daytime associated with sudden stratospheric warming (SSW) events, but only limited evidence of ionospheric disturbances during the nighttime has been reported up to now.
Leonid Benkevitch, Mary Spraggs, Anthea J. Coster   +2 more
exaly   +4 more sources

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Behavior of the nighttime ionosphere

Journal of Geophysical Research, 1967
Nighttime ionosphere maintained by downward flux of electrons from protonosphere as shown by columnar electron contents measurements, noting decay ...
A. V. Da Rosa, F. L. Smith
openaire   +1 more source

Models for the nighttime Venus ionosphere

Journal of Geophysical Research, 1969
Possible models for the nighttime Venus ionosphere are developed and compared with observations obtained from Mariner 5. The preferred model assumes the presence of a light reactive ion, such as He+ or H2+, in the topside ionosphere, and it is shown that all features of the observed ionization profile can be accounted for with this single hypothesis ...
Michael B. McElroy, Darrell F. Strobel
openaire   +1 more source

Vertical drifts in the nighttime ionosphere

Planetary and Space Science, 1966
Abstract Following the method outlined by Hanson and Patterson (1) , we have calculated the magnitude of vertical drifts in the F -region over Wakkanai (59° dip) and Ahmedabad (34° dip) during high and low sunspot years. The method takes into account the effect of ambipolar diifusion along the geomagnetic lines of force with and without the ...
S.S. Degaonkar, S. Sanatani
openaire   +1 more source