Results 41 to 50 of about 7,904 (219)

Identification of ionospheric scintillation in the low-latitude African sector using a commercial CubeSat constellation

Journal of Space Weather and Space Climate
Radio occultation (RO) measurements performed by Global Navigation Satellite System (GNSS) receivers onboard low-earth orbit (LEO) satellites are commonly used for a variety of atmospheric applications, including ionospheric and space weather studies. We
Mohanty Shradha, Hoque M. Mainul, Angling Matthew J.   +2 more
doaj   +1 more source

Ionospheric F‐Layer Scintillation Variabilities Over the American Sector During Sudden Stratospheric Warming Events

Space Weather, 2021
The present study investigates the ionospheric F‐layer scintillation responses in the American sector (90°W–0°, ±50° dip latitude) during the Northern Hemisphere winter sudden stratospheric warming events of 2007–2008, 2008–2009, 2009–2010, and 2012–2013.
Hailun Ye, Xianghui Xue, Tao Yu, Yang‐Yi Sun, Wen Yi, Chi Long, Weifan Zhang, Xiankang Dou   +7 more
doaj   +1 more source

Precision Southern Hemisphere pulsar VLBI astrometry: techniques and results for PSR J1559-4438

, 2008
We describe a data reduction pipeline for VLBI astrometric observations of pulsars, implemented using the ParselTongue AIPS interface. The pipeline performs calibration (including ionosphere modeling), phase referencing with proper accounting of ...
A. T. Deller, Bhat, Brisken, Brisken, Chatterjee, Chatterjee, Chatterjee, Coles, Cordes, Dodson, Fomalont, Kettenis, Kovalev, Kramer, Legge, Manchester, Migliazzo, Petrov, Press, S. J. Tingay, Shepherd, Shklovskii, Siegman, Titov, W. Brisken   +24 more
core   +1 more source

Wave‐Based Quantification of Ion Composition in the Earth's Magnetosphere‐Ionosphere‐Coupling Region

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Ion composition critically determines the basic kinetic characteristics of plasma and affects energy transmission of the magnetosphere. However, it exhibits significant variations with altitude, latitude, local time, longitude, and also with geomagnetic and solar activity.
Zhijie Qin, Hui Zhu, Zhihai Ouyang, Huicong Chen, Zhenghao She   +4 more
wiley   +1 more source

Amplitude scintillation detection with geodetic GNSS receivers leveraging machine learning decision tree

Satellite Navigation
The amplitude scintillation detection is typically achieved by using the scintillation index generated by dedicated and costly ionospheric scintillation monitoring receivers (ISMRs).
Wang Li, Yiping Jiang, Hongyuan Ji, Wenqiang Wei   +3 more
doaj   +1 more source

Dataset of Quiet Space Weather Periods for Ionospheric Studies

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak, Silvia Kostárová, Jaroslav Chum, Carsten Schmidt, Patrick Hannawald, Sabine Wüst, Lisa Küchelbacher, Vladimír Truhlík, Petra Koucká Knížová, Jaroslav Urbář, Lukáš Randuška, Filip Štempel, Ján Kubančák   +12 more
wiley   +1 more source

Magnetic Shear Damped Polar Convective Fluid Instabilities

, 2017
The influence of the magnetic field shear is studied on the $E\times B$ (and/or Gravitational) and the Current Convective Instabilities (CCI) occuring in the High latitude F-layer ionosphere.
Atul, Jyoti K, Chattopadhyaya, Prabal K, Kaw, Predhiman K, Kravchenko, Oleg V, Sarkar, Sanjib, Singh, Rameswar, Singh, Sushil K   +6 more
core   +1 more source

Pembangunan pembelajaran mobile dalam kejuruteraan [PDF]

, 2016
Perkembangan pembelajaran mobile hari ini memberi peluang untuk teknologi mobile dan teknologi Computer Aided Design (CAD) diintegrasikan dalam proses reka bentuk.
Ismail, Irwan Mahazir
core   +1 more source

Ionospheric Response to the 8 April 2024 Total Solar Eclipse: Plasma Depletion and Eclipse‐Driven MsTIDs

Space Weather, Volume 24, Issue 4, April 2026.
Abstract The total solar eclipse on 8 April 2024 provided a unique opportunity to investigate the three‐dimensional (3‐D) ionospheric response under enhanced solar activity over North America. In this study, we processed high‐density GNSS observations from ∼1,700 stations to derive vertical total electron content and applied a multi‐term sinusoidal ...
Wenbin Liang, Xiyan Sun, Yuanfa Ji, Xiaodong Ren   +3 more
wiley   +1 more source

Discovery of Regular Daily Ionospheric Scintillation

Atmosphere
The aim of this study was to find out whether, just like in March 2015, daily regular GPS positioning disturbances caused by ionospheric scintillations occurred in other months of the solar activity cycle 24.
Janis Balodis, Madara Normand, Ingus Mitrofanovs   +2 more
doaj   +1 more source