Results 51 to 60 of about 3,502 (180)

TGO Ramfjordmoen Ionosonde Data September 2021

, 2021
About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from September 01-30, 2021.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core   +1 more source

D- and F-Region Ionospheric Response to the Severe Geomagnetic Storm of April 2023

Atmosphere
This study investigates the impact on the Earth’s ionosphere of a severe geomagnetic storm (Dst ∼ −212 nT) that began on 23 April 2023 at around 17:37 UT according to very low-frequency (VLF, 3–30 kHz) or low-frequency (LF, 30–300 kHz) radio signals and ...
Arnab Sen, Sujay Pal, Bakul Das, Sushanta K. Mondal   +3 more
doaj   +1 more source

OI 630 nm Airglow Observed From Space as a Diagnostic of Nighttime Low‐Latitude Ionospheric Dynamics

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study investigates the nighttime morphology of the bottomside F region (∼250 km) at low latitudes using 630 nm airglow measurements from the Visible and Infrared Spectral Imager (VISI) aboard the Ionosphere, Mesosphere, Upper Atmosphere, and Plasmasphere (IMAP) mission on the International Space Station. For this purpose, we analyzed IMAP/
Hyosub Kil, Se‐Heon Jeong, Jeong‐Heon Kim, Woo Kyoung Lee, Young‐Sil Kwak, Akinori Saito, Takeshi Sakanoi   +6 more
wiley   +1 more source

TGO Ramfjordmoen Ionosonde Data February 1996

, 2019
About this dataset: This dataset contains ionosonde data in SAO format, and covers data from February 01-29, 1996.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at Ramfjordmoen near Tromsø ...
Tromsø Geophysical Observatory
core   +1 more source

Implementation of an Electronic Ionosonde to Monitor the Earth’s Ionosphere via a Projected Column through USRP

Sensors, 2017
This document illustrates the processes carried out for the construction of an ionospheric sensor or ionosonde, from a universal software radio peripheral (USRP), and its programming using GNU-Radio and MATLAB. The development involved the in-depth study
Jhon Jairo Barona Mendoza, Carlos Fernando Quiroga Ruiz, Carlos Rafael Pinedo Jaramillo   +2 more
doaj   +1 more source

Optimization Algorithms for Retrieving the Bottomside Ionospheric B0 and B1 Parameters

Radio Science, Volume 61, Issue 10, October 2026.
Abstract The bottomside morphological parameters of the ionospheric F2 layer, the thickness parameter B0 and the shape parameter B1, are crucial for describing electron density profiles and monitoring space weather. However, existing climatological models and indirect ionosonde approaches have limitations in real‐time applicability and direct ...
Cheng Wang, Xiaoyu Zhu, Zhen Li
wiley   +1 more source

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

TGO Ramfjordmoen Ionosonde Data April 2005

, 2019
About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from April 01-30, 2005.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core   +1 more source

Observation of Shortwave Fadeout Events Using Chinese Dual Auroral Radar Network (CN‐DARN) During the Severe Solar Storm in May 2024

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Shortwave fadeout (SWF) is a typical dayside high‐frequency radio disturbance caused by solar flare‐induced ionospheric ionization enhancement. Using newly built Chinese Dual Auroral Radar Network (CN‐DARN) observations, we investigate two X‐flare‐driven SWFs during the May 2024 geomagnetic superstorm (SYM‐H = −518 nT), on 10 May (pre‐storm ...
Junjie Tong, Jiaojiao Zhang, Hang Li, Wei Wang, Bianlong Zhao, Wenqian Chen, Xiang Deng, Ailan Lan, Jingye Yan, Chi Wang   +9 more
wiley   +1 more source

On the Propagation of Traveling Ionospheric Disturbances From the Hunga Tonga‐Hunga Ha'apai Volcano Eruption and Their Possible Connection With Tsunami Waves

Geophysical Research Letters, 2023
We report our analysis of ionospheric disturbances from the 15 January 2022 Tonga volcano eruption, using GPS data from the International GNSS Service network and ionosonde data in the Australian sector.
Rezy Pradipta, Brett A. Carter, Julie L. Currie, Suelynn Choy, Phil Wilkinson, Phillip Maher, Richard Marshall   +6 more
doaj   +1 more source