Results 1 to 10 of about 97,599 (153)
Resolution of the Equatorial Spread F Problem: Revisited
Frontiers in Astronomy and Space Sciences, 2023 An overview of recent advances made in understanding the phenomenon of equatorial spread F (ESF) is presented and a discussion of unresolved issues that need to be addressed. The focus is on research that has occurred in the last decade.
Joseph D Huba
exaly +4 more sources
Global Modeling of Equatorial Spread F With SAMI3/WACCM-X
Geophysical Research Letters, 2020 We report the first results of a global ionosphere/thermosphere simulation study that self‐consistently generates large‐scale equatorial spread F (ESF) plasma bubbles in the postsunset ionosphere.
Joseph D Huba, Han-Li Liu
exaly +3 more sources
Topside equatorial spread F-related field-aligned Poynting flux: observations and simulations
Earth, Planets and Space, 2022 Electric and magnetic field data from the Swarm constellation mission are used to report on the Poynting flux associated with postsunset topside equatorial spread F.
J. Rodríguez-Zuluaga +3 more
doaj +2 more sources
Equatorial spread-F forecasting model with local factors using the long short-term memory network
Earth, Planets and Space, 2023 The predictability of the nighttime equatorial spread-F (ESF) occurrences is essential to the ionospheric disturbance warning system. In this work, we propose ESF forecasting models using two deep learning techniques: artificial neural network (ANN) and ...
Phimmasone Thammavongsy +4 more
doaj +2 more sources
Remote Sensing, 2022 The occurrence of post-sunset equatorial spread-F (ESF) could have detrimental effects on trans-ionospheric radio wave propagation used in modern communications systems.
Prayitno Abadi +8 more
doaj +2 more sources
Daytime Equatorial Spread F‐Like Irregularities Detected by HF Doppler Receiver and Digisonde
Space Weather, 2021 Daytime equatorial spread F (ESF) is not as common as nighttime ESF due to the presence of a highly conducting E‐layer during the daytime which counteracts the development of F‐layer plasma irregularities.
B. Olugbon +6 more
doaj +2 more sources
The Effect of Midnight Temperature Maximum Winds on Post‐Midnight Equatorial Spread F
Space Weather, 2021 The SAMI3/equatorial spread F (Sami3 is also a model of the ionosphere/ESF) code is used to simulate the growth of equatorial plasma bubbles in the presence of a background wind field based on measured winds.
J. Krall +3 more
doaj +2 more sources
Regional simulations of equatorial spread F driven with, and an analysis of, WAM-IPE electric fields
Frontiers in PhysicsA three-dimensional, regional simulation is used to investigate ionospheric plasma density irregularities associated with Equatorial Spread F. This simulation is first driven with background electric fields derived from ISR observations.
Aaron Kirchman +2 more
doaj +2 more sources
Predicting Equatorial Spread F at JICAMARCA Sector Via Supervised Machine Learning
Space WeatherThe nighttime equatorial spread‐F (ESF) occurrence is essential to cause disturbances of the trans‐ionospheric radio wave signals. Previous research has successfully modeled the probability or growth rate of ESF, but remains deficient in distinguishing ...
Shunzu Gao +6 more
doaj +2 more sources
The Effect of Plasma Releases on Equatorial Spread F—a Simulation Study
Frontiers in Astronomy and Space Sciences, 2019 A currently unfulfilled goal of active experimentalists is to control the occurrence of instabilities in the ionosphere such as Equatorial Spread F (ESF), which generates large-scale electron density depletions (plasma bubbles) in the night-time ...
Katherine A. Zawdie +4 more
doaj +2 more sources