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View article: Unexpected STEVE Observations at High Latitude During Quiet Geomagnetic Conditions
Unexpected STEVE Observations at High Latitude During Quiet Geomagnetic Conditions Open
Strong Thermal Emission Velocity Enhancement (STEVE) is a fascinating optical phenomenon typically observed in the mid-latitude ionosphere. Recent observations reveal an exceptional STEVE event occurring at high latitudes, approximately 10…
View article: Investigating Low-latitude Ionospheric Variations During the 2024 "Mother's Day Storm": Combined Swarm and Ground-Based Observations
Investigating Low-latitude Ionospheric Variations During the 2024 "Mother's Day Storm": Combined Swarm and Ground-Based Observations Open
Geomagnetic storms significantly impact the morphology and dynamics of the Equatorial Ionization Anomaly (EIA). The geomagnetic storm of May 10, 2024, also known as the “Mother’s Day Storm”, was the most intense geomagnet…
View article: Intermittency in the integrated power of ionospheric density fluctuations
Intermittency in the integrated power of ionospheric density fluctuations Open
The occurrence of ionospheric irregularities poses a significant challenge to Global Navigation Satellite Systems (GNSS) by disrupting signal propagation and causing loss of lock (LOL) events. This study investigates the integrated power s…
View article: A Statistical Examination of the Spatial Correlations of HF Ionospheric Absorption Signatures Using the GO‐Canada Riometer Network
A Statistical Examination of the Spatial Correlations of HF Ionospheric Absorption Signatures Using the GO‐Canada Riometer Network Open
A network of 30‐MHz riometers distributed across Canada have been monitoring auroral absorption for decades. Electron precipitation can cause enhanced densities to develop below ∼100 km where the higher neutral density can cause absorption…
View article: Unexpected STEVE Observations at High Latitude During Quiet Geomagnetic Conditions
Unexpected STEVE Observations at High Latitude During Quiet Geomagnetic Conditions Open
Strong Thermal Emission Velocity Enhancement (STEVE), is a captivating optical phenomenon typically observed in the mid‐latitude ionosphere. This paper presents an intriguing observation of a STEVE event at high‐latitudes, approximately 10…
View article: Power Spectral Characteristics of In‐Situ Irregularities and Topside GPS Signal Intensity at Low Latitudes Using High‐Sample‐Rate Swarm Echo (e‐POP) Measurements
Power Spectral Characteristics of In‐Situ Irregularities and Topside GPS Signal Intensity at Low Latitudes Using High‐Sample‐Rate Swarm Echo (e‐POP) Measurements Open
Ionospheric density structures at low latitudes range in size from thousands of kilometers down to a few meters. Radio frequency (RF) signals, such as those from global navigation satellite systems, that propagate through irregularities su…
View article: Use of Terrestrial High Frequency Signals in Riometer Data to Explore the Size of D‐Region Electron Density Enhancements
Use of Terrestrial High Frequency Signals in Riometer Data to Explore the Size of D‐Region Electron Density Enhancements Open
This paper presents the first observations from the prototype Space Weather Adaptive Network (SWAN) riometers, which are capable of simultaneous measurements of narrow‐band terrestrial signal power and Cosmic Noise Absorption (CNA). We des…
View article: Post‐Sunset Field‐Line Resonances at Equatorial Latitudes Observed by Swarm
Post‐Sunset Field‐Line Resonances at Equatorial Latitudes Observed by Swarm Open
In this study employing data from the Swarm satellites at an altitude of ≈500 km, we present evidence of field‐line resonances (FLRs) in the Pc2‐3 (0.02–0.2 Hz) frequency band in the undisturbed post‐sunset region of the equatorial ionosph…
View article: Regional Mapping of Small‐Scale Equatorial Ionospheric Irregularities Using Swarm Echo Satellite Measurements
Regional Mapping of Small‐Scale Equatorial Ionospheric Irregularities Using Swarm Echo Satellite Measurements Open
We propose a novel approach to produce regional maps of small‐scale scintillation‐causing irregularities using a single satellite. To construct the maps, we employ several ionospheric GPS indices, including total electron content, high‐res…
View article: Probability distribution of integrated power of equatorial ionosphere plasma density fluctuations measured by the Swarm Langmuir probes
Probability distribution of integrated power of equatorial ionosphere plasma density fluctuations measured by the Swarm Langmuir probes Open
Ionospheric irregularities are structures or fluctuations of plasma density having different scale sizes. These irregularities can disrupt radio waves and produce errors in space-based or ground-based technologies, which depend on the GNSS…
View article: Altitude Distribution of Large and Small‐Scale Equatorial Ionospheric Irregularities Sampled From an Elliptical Low‐Earth Orbit
Altitude Distribution of Large and Small‐Scale Equatorial Ionospheric Irregularities Sampled From an Elliptical Low‐Earth Orbit Open
We provide insight into the vertical distribution of multi‐scale scintillation‐inducing irregularities in the low‐latitude ionosphere. In four sets of novel experiments, we sampled altitudes from 330 to 1,280 km in the 18–24 magnetic local…
View article: Altitude distribution of large and small-scale equatorial ionospheric irregularities sampled by the Swarm Echo satellite
Altitude distribution of large and small-scale equatorial ionospheric irregularities sampled by the Swarm Echo satellite Open
<p>Variations in ionospheric electron density, so-called irregularities, produce rapid fluctuations on propagating communication and navigation signals, which can be severe near the magnetic equator and in the polar regions. This may…
View article: Standing Alfvén Waves Within Equatorial Plasma Bubbles
Standing Alfvén Waves Within Equatorial Plasma Bubbles Open
Plasma depletions in the disturbed equatorial ionosphere are known to be associated with magnetic fluctuations and Alfvén waves. Here, using data from the Swarm B satellite's vector field magnetometer and electric fields instrument at an a…
View article: Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress)
Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress) Open
We advance the modeling capability of electron particle precipitation from the magnetosphere to the ionosphere through a new database and use of machine learning (ML) tools to gain utility from those data. We have compiled, curated, analyz…
View article: DMSP Particle Precipitation AI-ready Data
DMSP Particle Precipitation AI-ready Data Open
Description: The dataset ‘DMSP Particle Precipitation AI-ready Data’ accompanies the manuscript “Next generation particle precipitation: Mesoscale prediction through machine learning (a case study and framework for progress)” submitted to …
View article: DMSP Particle Precipitation AI-ready Data
DMSP Particle Precipitation AI-ready Data Open
Description: The dataset ‘DMSP Particle Precipitation AI-ready Data’ accompanies the manuscript “Next generation particle precipitation: Mesoscale prediction through machine learning (a case study and framework for progress)” submitted to …
View article: Characterizing Ionospheric Disturbances for Space Weather Hazard Mitigation
Characterizing Ionospheric Disturbances for Space Weather Hazard Mitigation Open
<p>The world relies increasingly on capabilities that are enabled or delivered by space-based systems, and there exists a need to continually refine our vulnerability assessment models and understanding of natural versus artificial t…
View article: Structure function analysis of plasma density fluctuations during total loss of lock of GPS signal events
Structure function analysis of plasma density fluctuations during total loss of lock of GPS signal events Open
<p>Ionospheric irregularities are fluctuations or structures of plasma density that affect the propagation of radio signals. Whenever large-scale irregularities break up into meso and small-scale irregularities, these processes becom…
View article: Characterization of Equatorial Low Latitude Ionospheric Scintillation of GPS Signals: An E-POP Experiment
Characterization of Equatorial Low Latitude Ionospheric Scintillation of GPS Signals: An E-POP Experiment Open
<p>Ionospheric irregularities are a major error source in GNSS positioning and navigation as they affect trans-ionospheric signal propagation. They cause random, rapid fluctuations in the intensity and phase of the received signal, r…
View article: Identification of scintillation signatures on GPS signals originating from plasma structures detected with EISCAT incoherent scatter radar along the same line of sight
Identification of scintillation signatures on GPS signals originating from plasma structures detected with EISCAT incoherent scatter radar along the same line of sight Open
Ionospheric scintillation originates from the scattering of electromagnetic waves through spatial gradients in the plasma density distribution, drifting across a given propagation direction. Ionospheric scintillation represents a disruptiv…