Results 11 to 20 of about 373,009 (204)
Case study on complex sporadic E layers observed by GPS radio occultations [PDF]
Atmospheric Measurement Techniques, 2015 The occurrence of sporadic E (Es) layers has been a hot scientific topic for a long time. The GNSS (global navigation satellite system)-based radio occultation (RO) has proven to be a powerful technique for detecting the global Es layers.
X. Yue +4 more
doaj +2 more sources
Long-distance propagation of 162 MHz shipping information links associated with sporadic E [PDF]
Atmospheric Measurement Techniques, 2022 Sporadic E layers form in the daytime midlatitude ionosphere as a result of wind shears in the mesosphere–lower-thermosphere compressing metallic ions of meteoric origin into dense, narrow sheets extending over hundreds or thousands of kilometers ...
A. T. Chartier +2 more
doaj +1 more source
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
Frontiers in Astronomy and Space Sciences, 2022 The dynamics of the electron population in the Earth’s radiation belts affect the upper atmosphere’s ionization level through the low-energy Electron Precipitation (EP).
L. D. Da Silva +21 more
semanticscholar +1 more source
Sporadic Ca and Ca+ layers at mid-latitudes: Simultaneous observations and implications for their formation [PDF]
Annales Geophysicae, 2001 We report on the observations of 188 sporadic layers of either Ca atoms and/or Ca ions that we have observed during 112 nights of lidar soundings of Ca, and 58 nights of Ca+ soundings, at Kühlungsborn, Germany (54° N, 12° E). The Ca+ soundings have
M. Gerding +4 more
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The role of total wind in the vertical dynamics of ions in the E-region at high latitudes [PDF]
Annales Geophysicae, 2005 A seasonally dependent total neutral wind model obtained from experimental data is used to evaluate the diurnal variation of the vertical ion velocity in the E-region at a high-latitude location (Tromsø), for each season, in the presence of an ...
M. Voiculescu, M. Ignat
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Earth, Planets and Space, 2022 Scintillations in the signal-to-noise (SNR) profiles of GNSS radio occultation (RO) measurements at lower ionospheric altitudes are caused by compact layers of high ionization also known as sporadic E (Es) layers. It is widely accepted that Es layers are
Christina Arras +4 more
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Comparison of the Heights of Sporadic E Layers and Vertical Ion Convergence Parameters
Remote Sensing, 2023 Sporadic E (Es) layers are thin layers of enhanced electron density that commonly appear at altitudes of 90–130 km, often impacting radio communications and navigation systems.
Yan Yu +7 more
semanticscholar +1 more source
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.
Jing Jiao +12 more
doaj +1 more source
An explanation for the seasonal dependence of midlatitude sporadic E layers
Journal of Geophysical Research, 2007 C. Haldoupis +4 more
semanticscholar +3 more sources