Results 11 to 20 of about 92,748 (240)
Upwelling: a unit of disturbance in equatorial spread F [PDF]
Progress in Earth and Planetary Science, 2015 Plasma structure in the nighttime equatorial F layer, often referred to as equatorial spread F (ESF), is not uniformly distributed, either in time or in space.
R. Tsunoda
semanticscholar +2 more sources
On the seeding of equatorial spread F by gravity waves [PDF]
Geophysical Research Letters, 2013 AbstractThe Naval Research Laboratory three‐dimensional simulation code SAMI3/ESF is used to study the response of the postsunset ionosphere to plane gravity waves. The effect of the vertical wind component of the wave is included as well as the effect of the background vertical wind, which can suppress equatorial spread F (ESF).
Joseph Huba, Jonathan Krall
exaly +2 more sources
Spread F – an old equatorial aeronomy problem finally resolved? [PDF]
Annales Geophysicae, 2009 One of the oldest scientific topics in Equatorial Aeronomy is related to Spread-F. It includes all our efforts to understand the physical mechanisms responsible for the existence of ionospheric F-region irregularities, the spread of the traces in a ...
R. F. Woodman
doaj +3 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
Bottom-type scattering layers and equatorial spread F [PDF]
Annales Geophysicae, 2004 Jicamarca radar observations of bottom-type coherent scattering layers in the post-sunset bottomside F-region ionosphere are presented and analyzed.
D. L. Hysell, J. Chun, J. L. Chau
doaj +4 more sources
Effect of equatorial ionization anomaly on the occurrence of spread-F [PDF]
Annales Geophysicae, 1997 The unique geometry of the geomagnetic field lines over the equatorial ionosphere coupled with the E-W electric field causes the equatorial ionization anomaly (EIA) and equatorial spread-F (ESF).
P. T. Jayachandran +3 more
doaj +4 more sources
Equatorial spread F fossil plumes [PDF]
Annales Geophysicae, 2010 Behaviour of equatorial spread F (ESF) fossil plumes, i.e., ESF plumes that have stopped rising, is examined using the NRL SAMI3/ESF three-dimensional simulation code.
J. Krall +3 more
doaj +1 more source
The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations [PDF]
Journal of Astronomy and Space Sciences, 2009 In this paper, relative orbit of Low Earth Orbit satellites is determined using only GPS measurements and the effects of Equatorial Spread-F (ESF), that is one of biggest ionospheric irregularities, are investigated.
Kyoung-Min Roh +3 more
doaj +1 more source
Earth, Planets and Space, 2023 The occurrence of equatorial spread F (ESF) has the potential to detrimentally impact space-based technological systems. This study investigates the utility of ionosondes in forecasting the incidence of post-sunset ESF in the zonal direction, utilizing ...
P. Abadi +8 more
semanticscholar +1 more source
Simulation of the seeding of equatorial spread F by circular gravity waves
Geophysical Research Letters, 2013 Joseph Huba, Jonathan Krall
exaly +2 more sources