Results 21 to 30 of about 792,165 (198)

Density enhancements associated with equatorial spread F [PDF]

Annales Geophysicae, 2010
Forces governing the three-dimensional structure of equatorial spread-F (ESF) plumes are examined using the NRL SAMI3/ESF three-dimensional simulation code.
J. Krall, J. D. Huba, G. Joyce, T. Yokoyama   +3 more
doaj   +1 more source

Multistation digisonde observations of equatorial spread F in South America [PDF]

Annales Geophysicae, 2004
Directional ionogram and F-region drift observations were conducted at seven digisonde stations in South America during the COPEX campaign from October to December 2002.
B. W. Reinisch, M. Abdu, I. Batista, G. S. Sales, G. Khmyrov, T. A. Bullett, J. Chau, V. Rios   +7 more
doaj   +1 more source

Longitudinal differences in the statistical characteristics of ionospheric spread-F occurrences at midlatitude in Eastern Asia

Earth, Planets and Space, 2019
Spread-F is known as the electron density inhomogeneous structures in F layer of ionosphere and can usually be classified as frequency spread-F (FSF) and range spread-F (RSF).
Ning Wang, Lixin Guo, Zonghua Ding, Zhenwei Zhao, Zhengwen Xu, Tong Xu, Yanli Hu   +6 more
doaj   +1 more source

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.
J. D. Huba, H.‐L. Liu
doaj   +1 more source

A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya [PDF]

Annales Geophysicae, 2015
We analyze the data recorded during December 2011–November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6° E, 18.3° N; dip lat.
Y. Zhang, Y. Zhang, Y. Zhang, W. Wan, W. Wan, G. Li, G. Li, L. Liu, L. Liu, L. Hu, L. Hu, B. Ning, B. Ning   +12 more
doaj   +1 more source

Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours

Space Weather, 2021
In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented.
Lehui Wei, Chunhua Jiang, Ting Lan, Wenxuan Wang, Hua Shen, Ercha Aa, Wengeng Huang, Jing Liu, Guobin Yang, Yaogai Hu, Zhengyu Zhao   +10 more
doaj   +1 more source

Ionosonde Observations of Spread F and Spread Es at Low and Middle Latitudes during the Recovery Phase of the 7–9 September 2017 Geomagnetic Storm

Remote Sensing, 2021
This study presents observations of nighttime spread F/ionospheric irregularities and spread Es at low and middle latitudes in the South East Asia longitude of China sectors during the recovery phase of the 7–9 September 2017 geomagnetic storm.
Lehui Wei, Chunhua Jiang, Yaogai Hu, Ercha Aa, Wengeng Huang, Jing Liu, Guobin Yang, Zhengyu Zhao   +7 more
doaj   +1 more source

IonoGAN: An Enhanced Model for Forecasting Quiet and Disturbed Ionospheric Features From Predicted Ionograms

Space Weather
Ionograms are radar echo graphs that depict vertical ionospheric density profiles, structures, fluctuations, and irregularities, with the F region represented by F‐trace and Spread‐F features in the graphs.
Chu Qiu, Jinhui Cai, Zheng Wang, Pengdong Gao, Guojun Wang, Quan Qi, Bo Wang, Zhengwei Cheng, Jiankui Shi, Yajun Zhu, Xiao Wang, Kai Ding   +11 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Climatology of Spread F over Tucumán from Massive Statistical Analysis of Autoscaled Data

Atmosphere, 2021
Automatic ionogram interpretation methods developed for real-time ionospheric monitoring can be applied in retrospective studies to analyze large quantities of data. The Autoscala software, implemented for such a purpose, includes a routine for automatic
Carlo Scotto, Dario Sabbagh
doaj   +1 more source