Results 1 to 10 of about 139,585 (296)
Electric field measurements of DC and long wavelength structures associated with sporadic-E layers and QP radar echoes [PDF]
Annales Geophysicae, 2005 Electric field and plasma density data gathered on a sounding rocket launched from Uchinoura Space Center, Japan, reveal a complex electrodynamics associated with sporadic-E layers and simultaneous observations of quasi-periodic radar echoes.
R. Pfaff +7 more
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Numerical prediction of sporadic E layer occurrence using GAIA [PDF]
Earth, Planets and Space, 2021 A sporadic E layer has significant influence on radio communications and broadcasting, and predicting the occurrence of sporadic E layers is one of the most important issues in space weather forecast.
Hiroyuki Shinagawa +4 more
doaj +2 more sources
Energetics and structure of the lower E region associated with sporadic E layer [PDF]
Annales Geophysicae, 2008 The electron temperature (Te), electron density (Ne), and two components of the electric field were measured from the height of 90 km to 150 km by one of the sounding rockets launched during the SEEK-2 campaign.
K.-I. Oyama +6 more
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Assessing the quality of ionogram interpretation using the HF Doppler technique [PDF]
Annales Geophysicae, 2007 The first joint common volume measurements by the Digisonde Portable Sounder (DPS-4) and a new Doppler type system has been run at the Pruhonice ionospheric observatory (49.99° N, 14.54° E) since January 2004.
D. Buresova +7 more
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Solar-Terrestrial Physics, 2017 A double-laser beam lidar to measure potassium (K) layer at Beijing (40.5° N, 116.2° E) was successfully developed in 2010. The parameters of sporadic Ks layers and their distributions were given.
Jing Jiao +4 more
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An Empirical Model of the Sporadic E Layer Intensity Based on COSMIC Radio Occultation Observations
Space Weather, 2023 Ionospheric sporadic E layers are common phenomena occurring in the ionospheric E region altitude (∼90–120 km) with much higher electron density. The lack of a large amount of sporadic E layer intensity observation on a global scale restrains the ...
Jun Niu, Han‐xian Fang
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Space Weather, 2021 A longitudinal chain and a latitudinal chain of ionosondes, located at Yakutsk (129.60°E, 62.00°N), Mohe (122.37°E, 53.50°N), Beijing (116.25°E, 40.25°N), Wuhan (114.61°E, 30.53°N), Sanya (109.42°E, 18.34°N), I‐Cheon (127.54°E, 37.14°N), San Vito (17.80 ...
Qiong Tang +7 more
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The Comprehensive Study of Low Thermospheric Sodium Layers during the 24th Solar Cycle
Atmosphere, 2020 The low thermospheric sodium layer (LTSL) is the separate sodium atom layer above 105 km. Based on 11,607 h of lidar observations from Yanqing (40.5° N, 116.0° E) from 2010 to 2016, we found 38 LTSLs wherein the peak densities were more than ...
Yuchang Xun +8 more
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Earth, Planets and Space, 2023 Nine years of ionograms from a higher mid-latitude ionospheric station (Moscow) are analyzed, by applying the ‘height–time–intensity’ (HTI) technique along with Spectrum (Lomb periodogram) analysis with the aim to investigate the daily and seasonal ...
Christina Oikonomou +4 more
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Impacts of Kelvin-Helmholtz billow formation on GNSS radio occultation measurements of sporadic-E
Frontiers in Astronomy and Space Sciences, 2023 Global Navigation Satellite System (GNSS) Radio Occultation (RO) has shown great promise for monitoring sporadic-E layers. However, extracting sporadic-E information from RO signals remains a difficult task due to the many unknown parameters such as ...
Andrew J. Knisely, Daniel J. Emmons
doaj +1 more source