Results 31 to 40 of about 5,760 (194)

Impact of sudden stratospheric warmings on equatorial ionization anomaly [PDF]

Journal of Geophysical Research: Space Physics, 2010
We investigate the ionospheric response to several stratospheric sudden warming events which occurred in Northern Hemisphere winters of 2008 and 2009 during solar minimum conditions. We use GPS total electron content data in a broad latitudinal region at ±40° geographic latitude and a single longitude, 75°W.
L. P. Goncharenko, A. J. Coster, J. L. Chau, C. E. Valladares   +3 more
openaire   +1 more source

Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity period of 2004?2005 [PDF]

, 2006
International audienceWith the recent increase in the satellite-based navigation applications, the ionospheric total electron content (TEC) and the L-band scintillation measurements have gained significant importance.
Gopi Krishna, S., Niranjan, K., Prasad, D. S. V. V. D., Rama Rao, P. V. S.   +3 more
core   +8 more sources

Ionospheric irregularities: The role of the equatorial ionization anomaly [PDF]

Radio Science, 1997
The availability of similar ionosondes at four locations in India covering the regions from the equator to the northern crest of the equatorial ionization anomaly (EIA) has provided a unique opportunity to study the role of the EIA and related processes in the occurrence of spread F.
P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram   +2 more
openaire   +1 more source

Analysis of Ionospheric Anomalies before the Tonga Volcanic Eruption on 15 January 2022

Remote Sensing, 2023
In this paper, GNSS stations’ observational data, global ionospheric maps (GIM) and the electron density of FORMOSAT-7/COSMIC-2 occultation are used to study ionospheric anomalies before the submarine volcanic eruption of Hunga Tonga–Hunga Ha’apai on 15 ...
Jiandi Feng, Yunbin Yuan, Ting Zhang, Zhihao Zhang, Di Meng   +4 more
doaj   +1 more source

Ionospheric response to the 2009 sudden stratospheric warming over the equatorial, low, and middle latitudes in the South American sector [PDF]

, 2015
The present study investigates the ionospheric total electron content (TEC) and F-layer response in the Southern Hemisphere equatorial, low, and middle latitudes due to major sudden stratospheric warming (SSW) event, which took place during January ...
Coster, A. J., De Abreu, A. J., De Jesus, R., Fagundes, P. R., Gende, Mauricio Alfredo, Goncharenko, L. P., Pezzopane, M., Pillat, V. G., Venkatesh, K.   +8 more
core   +2 more sources

On the relationship between the postmidnight thermospheric equatorial mass anomaly and equatorial ionization anomaly under geomagnetic quiet conditions [PDF]

Journal of Geophysical Research: Space Physics, 2011
The equatorial mass anomaly (EMA) in the thermosphere and equatorial ionization anomaly (EIA) in the ionosphere are two interesting phenomena in low-equatorial latitude regions. Previous studies have shown that the EMA appears between 1000 and 2000 local time (LT) and its location of trough is aligned with dip equator, indicating the plausible role of ...
Jing Liu, Libo Liu, Biqiang Zhao, Jiuhou Lei, Weixing Wan   +4 more
openaire   +1 more source

Equatorial westward electrojet impacting equatorial ionization anomaly development during the 6 April 2000 superstorm [PDF]

Journal of Geophysical Research: Space Physics, 2013
AbstractWe investigate the forward plasma fountain and the equatorial ionosphere in the topside region during the 6 April 2000 superstorm in the Australian sector at ~0900 LT. Space‐ and ground‐based multi‐instrument measurements, Coupled Thermosphere‐Ionosphere‐Plasmasphere Electrodynamics (CTIPe) simulations, and field‐aligned observations comprise ...
Horvath, Ildiko, Lovell, Brian C.
openaire   +2 more sources

Determining the Day-to-Day Occurrence of Low-Latitude Scintillation in Equinoxes at Sanya during High Solar Activities (2012–2013)

Atmosphere, 2023
Plasma irregularity in the equatorial and low-latitude ionosphere, which leads to ionospheric scintillation, can threaten the operation of radio-based communication and navigation systems. A method for forecasting scintillation activity is still pending.
Guodong Jia, Weihua Luo, Xiao Yu, Zhengping Zhu, Shanshan Chang   +4 more
doaj   +1 more source

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

Study of the Spatiotemporal Characteristics of the Equatorial Ionization Anomaly Using Shipborne Multi-GNSS Data: A Case Analysis (120–150°E, Western Pacific Ocean, 2014–2015)

Remote Sensing, 2021
Ground-based GNSS (Global Navigation Satellite System) reference stations lack the capacity to provide data for ocean regions with sufficient spatial-temporal resolution, limiting the detailed study of the equatorial ionization anomaly (EIA).
Xiaowen Luo, Di Wang, Jinling Wang, Ziyin Wu, Jinyao Gao, Tao Zhang, Chunguo Yang, Xiaoming Qin, Xiaolun Chen   +8 more
doaj   +1 more source