Results 51 to 60 of about 756,404 (200)

TID characterised using joint effort of incoherent scatter radar and GPS [PDF]

Annales Geophysicae, 2014
Travelling Ionospheric Disturbances (TIDs), which are caused by Atmospheric Gravity Waves (AGWs), are detected and characterised by a joint analysis of the results of two measurement techniques: incoherent scatter radar and multiple-receiver GPS ...
M. van de Kamp, D. Pokhotelov, D. Pokhotelov, K. Kauristie   +3 more
doaj   +1 more source

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 682-691, October/December 2026.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +1 more source

Simulation of interferometric imaging with EISCAT_3D for fine-scale in-beam incoherent scatter spectra measurements [PDF]

Annales Geophysicae
The 233 MHz EISCAT_3D radar system currently under construction in northern Fennoscandia will be able to resolve ionospheric structures smaller than the transmit beam dimensions through the use of interferometric imaging.
D. Huyghebaert, D. Huyghebaert, B. Gustavsson, J. Vierinen, A. Kvammen, M. Zettergren, J. Swoboda, I. Virtanen, S. M. Hatch, K. M. Laundal   +9 more
doaj   +1 more source

The Reliability of HF Propagation Links Over Canada During Absorption Events

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Natural Resources Canada monitors space weather impacts to high frequency radio wave propagation using several High Frequency transmitter/receiver links across Canada. HF data received in Alert from a transmitter in Ottawa are examined in this study.
R. G. Gillies, E. Spanswick, R. Fiori, F. Ghaly, T. Cameron, S. Skone   +5 more
wiley   +1 more source

Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements [PDF]

Atmospheric Measurement Techniques, 2016
We validate two-dimensional ionospheric tomography reconstructions against EISCAT incoherent scatter radar measurements. Our tomography method is based on Bayesian statistical inversion with prior distribution given by its mean and covariance. We employ
J. Norberg, I. I. Virtanen, L. Roininen, J. Vierinen, M. Orispää, K. Kauristie, M. S. Lehtinen   +6 more
doaj   +1 more source

Comment on Blagoveshchenskaya et al. Artificial Ducts Created via High-Power HF Radio Waves at EISCAT. Remote Sens. 2023, 15, 2300

Remote Sensing, 2023
The claim that incoherent scatter radar data show electron density enhancements of 50–80% during some ionospheric heating experiments in a recent paper is questioned.
Michael Rietveld, Andrew Senior
doaj   +1 more source

Construction of a Global Atmospheric Refractivity Model for Optical Wavelengths Based on Temporal Evolution Characteristics

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract Atmospheric refractivity model accuracy is important for refraction correction, starlight refraction navigation, and related optoelectronic applications. To address the insufficient understanding of refractivity temporal evolution and the lack of clear criteria for selecting model temporal resolution, this study constructs a global four ...
Zhiyan Ding, Pengfei Wu, Wenyue Zhu
wiley   +1 more source

The Comparison of Electron Density between CSES In Situ and Ground-Based Observations in China

Remote Sensing, 2022
As the observation accuracy of parameters in the ionosphere cannot be directly checked, the comparison with other observations is the main way to evaluate the data quality of satellite measurements.
Jing Liu, Tong Xu, Zonghua Ding, Xuemin Zhang   +3 more
doaj   +1 more source

Equatorial F‐Region Responses to the Main Phase of the 10 May 2024 Geomagnetic Storm Over the South American Sector: Observations and Model Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study examines the equatorial ionospheric response over the South American sector during the onset of the extreme 2024 Mother's Day geomagnetic storm, which began at ∼17 UT on 10 May and reached the G5 level. Pronounced disturbances in ionospheric electrodynamics were observed under both daytime and nighttime conditions. Variations in the
A. M. Santos, J. R. Souza, I. S. Batista, M. Bravo, C. G. M. Brum, J. H. A. Sobral, S. S. Chen, R. Sá, L. C. A. Resende, J. Moro, P. R. Jauer, L. da Silva, D. Medeiros, P. A. B. Nogueira, E. A. Kherani, V. F. Andrioli, M. A. Abdu, G. S. Adeniran, R. de Jesus, A. A. Pimenta, G. Yang, F. A. de Souza   +21 more
wiley   +1 more source

The Importance of Incoherent Scatter Radars in Substorm Studies.

Journal of geomagnetism and geoelectricity, 1995
Before data from incoherent scatter radars became available to the space physics community, the identification of substorms relied heavily on those from ground-based magnetometers. The construction of radars and their subsequent upgradings in operational techniques during the last two decades have made it possible to unveil the different roles that ...
Kamide, Y., Brekke, A.
openaire   +2 more sources