Results 41 to 50 of about 11,557,211 (324)
A model for equatorial explosive spread F
Geophysical Research Letters, 1984 Explosive spread F was first described by Woodman and LaHoz [1976]. In such events the 50 MHz radar signal rises at Jicamarca to 10‐20 db above the noise level within a few milliseconds but then disappears within 100 ms or less. Woodman has suggested that electric fields from thunderstorms might drive a plasma instability which could cause these echoes,
M. C. Kelley +3 more
openaire +1 more source
AMISR-14: Observations of equatorial spread F [PDF]
, 2015 A new, 14-panel Advanced Modular Incoherent Scatter Radar (AMISR-14) system was recently deployed at the Jicamarca Radio Observatory. We present results of the first coherent backscatter radar observations of equatorial spread F (ESF) irregularities made
Milla, Marco +7 more
core +1 more source
Radar Observations of 8.3-m scale equatorial spread F irregularities over Trivandrum [PDF]
Annales Geophysicae, 2004 In this paper, we present observations of equatorial spread F (ESF) irregularities made using a newly installed 18MHz radar located at Trivandrum. We characterize the morphology and the spectral parameters of the 8.3-m ESF irregularities which are ...
D. Tiwari +6 more
doaj +1 more source
Equatorial spread F studies using SAMI3 with two-dimensional and three-dimensional electrostatics [PDF]
Annales Geophysicae, 2013 This letter presents a study of equatorial F region irregularities using the NRL SAMI3/ESF model, comparing results using a two-dimensional (2-D) and a three-dimensional (3-D) electrostatic potential solution. For the 3-D potential solution, two cases
H. C. Aveiro, J. D. Huba
doaj +1 more source
Advances in Space Research, 2018 We study the relationship of equatorial ionization anomaly (EIA) to the occurrence of nighttime equatorial spread F (ESF) using data from ground-based GPS stations and a horizontal meridional neutral wind model for the East African sector.
E. B. Seba, M. Nigussie, M. Moldwin
semanticscholar +1 more source
, 1993 82-88Ever since the discovery of equatorial Spread-F, it has been a subject of intense experimental and theoretical investigations. Very substantial progress has been made in the understanding of the generation and growth of the spread-F irregularities ...
Murthy, B V Krishna
core
GeS as an Emerging OTS Material: Atomic Structure and Modeling of ON/OFF Switching
Advanced Functional Materials, EarlyView.The structural puzzle of glassy GeS, an advanced memory‐selector material, has finally been disentangled, revealing a patchwork of mixed tetrahedral and trigonal species. Under a high electric field, over‐ and under‐coordinated Ge and S defects, together with three‐membered rings, form an interconnected network associated with localized and extended ...
Andrey Tverjanovich +13 more
wiley +1 more source
Post-midnight Occurrence of Equatorial Spread-F [PDF]
, 1981 113-114Evidence is presented to point out that the presence of an elevated F-region with reduced peak electron density in the equatorial region does not always result in the occurrence of spread-F condition in the post-midnight ...
Sastri, J Hanumath
core
A Noninvasive Approach to Study Localized Forces in 3D Epithelia
Advanced Materials, EarlyView.Epithelial morphogenesis depends on dynamic mechanical coupling between adhesion complexes and the cytoskeleton, yet its regulation in polarized 3D tissues remains elusive. We developed a noninvasive strategy using cell‐like elastic microbeads to quantify local forces in intact epithelia.
Niels Gouirand +9 more
wiley +1 more source
Three-dimensional simulation of equatorial spread-F with meridional wind effects [PDF]
Annales Geophysicae, 2009 The NRL SAMI3 three-dimensional simulation code is used to examine the effect of meridional winds on the growth and suppression of equatorial spread F (ESF).
J. Krall +3 more
doaj +1 more source