Roberta Tozzi
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View article: Power Density Dissipated by Field‐Aligned Currents in the Topside Ionosphere Derived From Swarm‐A Observations
Power Density Dissipated by Field‐Aligned Currents in the Topside Ionosphere Derived From Swarm‐A Observations Open
Magnetosphere‐ionosphere (MI) coupling is mainly achieved by field‐aligned currents (FACs) that inject energy and momentum into the high‐latitude ionosphere. A fraction of this energy is locally dissipated and converted into kinetic energy…
View article: Italian research and development in space weather and space climate: a state-of-the-art overview
Italian research and development in space weather and space climate: a state-of-the-art overview Open
This article presents a concise overview of research developments and advancements in space weather and space climate, with a specific focus on the significant contributions made by members of the Italian Space Weather Community (SWICo). W…
View article: Perpendicular Electrical Conductivity in the Topside Ionosphere Derived from Swarm Measurements
Perpendicular Electrical Conductivity in the Topside Ionosphere Derived from Swarm Measurements Open
The study of the physical properties of the topside ionosphere is fundamental to investigating the energy balance of the ionosphere and developing accurate models to predict relevant phenomena, which are often at the root of Space Weather …
View article: Investigating Equatorial Plasma Depletions through CSES-01 Satellite Data
Investigating Equatorial Plasma Depletions through CSES-01 Satellite Data Open
Ionospheric plasma density irregularities, which are one of the primary sources of disturbance for the Global Navigation Satellite System, significantly impact the propagation of electromagnetic signals, leading to signal degradation and p…
View article: The effects of the May 2024 Mother’s Day superstorm over the Mediterranean sector: from data to public communication
The effects of the May 2024 Mother’s Day superstorm over the Mediterranean sector: from data to public communication Open
On 8 May 2024, the solar active region AR13664 started releasing a series of intense solar flares. Those of class X released between 9 and 11 May 2024 gave rise to a chain of fast Coronal Mass Ejections (CMEs) that proved to be geoeffectiv…
View article: Mapping Subsurface Conductivity: Challenges and Progress in Italy's MARGE Project
Mapping Subsurface Conductivity: Challenges and Progress in Italy's MARGE Project Open
In Italy, the MARGE initiative, an abbreviation for Geoelectromagnetic Risk Map for Central Italy, strives to create an extensive map of subsurface electrical conductivity by analyzing natural electric and magnetic fields.Led by the Nation…
View article: TROPOMAG - Influence of geomagnetic storms on the TROPOsphere dynamics: Can the Earth’s MAGnetic field be considered a proxy of climate changes? Some results
TROPOMAG - Influence of geomagnetic storms on the TROPOsphere dynamics: Can the Earth’s MAGnetic field be considered a proxy of climate changes? Some results Open
The TROPOMAG project investigates the possible effects of changes of the Earth’s magnetic field on the atmosphere and weather conditions with the aim to better quantify the natural sources of the atmospheric variability. This need ra…
View article: Polar Cap Patches Scaling Properties: Insights from Swarm Data
Polar Cap Patches Scaling Properties: Insights from Swarm Data Open
Among the effects of space weather, the degradation of air traffic communications and satellite-based navigation systems are the most notable. For this reason, it is of uttermost importance to understand the nature and origin of ionospheri…
View article: Modeling the Topside Ionosphere Effective Scale Height through In Situ Electron Density Observations by Low-Earth-Orbit Satellites
Modeling the Topside Ionosphere Effective Scale Height through In Situ Electron Density Observations by Low-Earth-Orbit Satellites Open
In this work, we aim to characterize the effective scale height at the ionosphere F2-layer peak (H0) by using in situ electron density (Ne) observations by Langmuir Probes (LPs) onboard the China Seismo-Electromagnetic Satellite (CSES—01).…
View article: Using nine years of Swarm magnetic field observations to estimate ionospheric electric current density through the curl-B technique
Using nine years of Swarm magnetic field observations to estimate ionospheric electric current density through the curl-B technique Open
Besides the high resolution of measurements, one feature that distinguishes ESA Swarm mission from previous ones, also aimed at monitoring the Earth's magnetic field at Low Earth Orbit altitudes, is its configuration. We here take advantag…
View article: Topside ionosphere effective plasma scale height characterization through CSES-01 satellite Langmuir Probes observations
Topside ionosphere effective plasma scale height characterization through CSES-01 satellite Langmuir Probes observations Open
The topside ionosphere embraces the region extending from the F2-layer electron density peak to the overlying plasmasphere. In this region the electron density monotonically decreases at a vertical rate driven by the plasma scale height, w…
View article: Investigation of the Physical Processes Involved in GNSS Amplitude Scintillations at High Latitude: A Case Study
Investigation of the Physical Processes Involved in GNSS Amplitude Scintillations at High Latitude: A Case Study Open
The storm onset on 7 September 2017, triggered several variations in the ionospheric electron density, causing severe phase fluctuations at polar latitudes in both hemispheres. In addition, although quite rare at high latitudes, clear ampl…
View article: The CAESAR Project for the ASI Space Weather Infrastructure
The CAESAR Project for the ASI Space Weather Infrastructure Open
This paper presents the project Comprehensive spAce wEather Studies for the ASPIS prototype Realization (CAESAR), which aims to tackle the relevant aspects of Space Weather (SWE) science and develop a prototype of the scientific data centr…
View article: Multiscale Features of Magnetic Field Fluctuations and Field-Aligned Currents in the Polar Ionosphere: A Case Study
Multiscale Features of Magnetic Field Fluctuations and Field-Aligned Currents in the Polar Ionosphere: A Case Study Open
Complexity is a typical feature of space plasmas that may involve the formation of multiscale coherent magnetic and plasma structures. The winding features (pseudo-polarization) of magnetic field fluctuations at different spatial scales ar…
View article: Dissipation of field-aligned currents in the topside ionosphere
Dissipation of field-aligned currents in the topside ionosphere Open
View article: Parallel Electrical Conductivity at Low and Middle Latitudes in the Topside Ionosphere Derived from CSES-01 Measurements
Parallel Electrical Conductivity at Low and Middle Latitudes in the Topside Ionosphere Derived from CSES-01 Measurements Open
The study of electrical currents in the topside ionosphere is of great importance, as it may allow a better understanding of the processes involved in the Sun–Earth interaction and magnetosphere–ionosphere–thermosphere coupling, two crucia…
View article: Inter-Calibration and Statistical Validation of Topside Ionosphere Electron Density Observations Made by CSES-01 Mission
Inter-Calibration and Statistical Validation of Topside Ionosphere Electron Density Observations Made by CSES-01 Mission Open
The China Seismo-Electromagnetic Satellite (CSES-01) provides in situ electron density (Ne) observations through Langmuir probes (LPs) in the topside ionosphere since February 2018. CSES-01 is a sun-synchronous satellite probing the ionosp…
View article: Ionospheric Turbulence: A Challenge for GPS Loss of Lock Understanding
Ionospheric Turbulence: A Challenge for GPS Loss of Lock Understanding Open
Ionospheric irregularities may affect electromagnetic signals propagating through the ionosphere and consequently contribute to the malfunctioning of the Global Navigation Satellite Systems hindering their accuracy and reliability. In this…
View article: Ionospheric Turbulence and the Equatorial Plasma Density Irregularities: Scaling Features and RODI
Ionospheric Turbulence and the Equatorial Plasma Density Irregularities: Scaling Features and RODI Open
<p>In the framework of space weather, the understanding of the physical mechanisms responsible for the generation of ionospheric irregularities is particularly relevant for their effects on global positioning and communication system…
View article: Magnetic Field and Electron Density Scaling Properties in the Equatorial Plasma Bubbles
Magnetic Field and Electron Density Scaling Properties in the Equatorial Plasma Bubbles Open
The ionospheric plasma density irregularities are known to play a role in the propagation of electromagnetic signals and to be one of the most important sources of disturbance for the Global Navigation Satellite System, being responsible f…
View article: On the Best Settings to Calculate Ionospheric Irregularity Indices From the <i>In Situ</i> Plasma Parameters of CSES-01
On the Best Settings to Calculate Ionospheric Irregularity Indices From the <i>In Situ</i> Plasma Parameters of CSES-01 Open
Electron density (Ne) and temperature (Te) values recorded by the Langmuir probe onboard the first satellite of the China Seismo-Electromagnetic Satellite (CSES-01) mission allow calculating quantities such as the rate of change of electro…
View article: On the Electron Temperature in the Topside Ionosphere as Seen by Swarm Satellites, Incoherent Scatter Radars, and the International Reference Ionosphere Model
On the Electron Temperature in the Topside Ionosphere as Seen by Swarm Satellites, Incoherent Scatter Radars, and the International Reference Ionosphere Model Open
The global statistical median behavior of the electron temperature (Te) in the topside ionosphere was investigated through in-situ data collected by Langmuir Probes on-board the European Space Agency Swarm satellites constellation from the…
View article: A New Ionospheric Index to Investigate Electron Temperature Small-Scale Variations in the Topside Ionosphere
A New Ionospheric Index to Investigate Electron Temperature Small-Scale Variations in the Topside Ionosphere Open
The electron temperature (Te) behavior at small scales (both spatial and temporal) in the topside ionosphere is investigated through in situ observations collected by Langmuir Probes on-board the European Space Agency Swarm satellites from…
View article: Investigation of the Physical Processes Involved in GNSS Amplitude Scintillations at High Latitude: A Case Study
Investigation of the Physical Processes Involved in GNSS Amplitude Scintillations at High Latitude: A Case Study Open
The storm onset on 7 September 2017, triggered several variations in the ionospheric electron density, causing severe phase fluctuations at polar latitudes in both hemispheres. In addition, although quite rare at high latitudes, clear ampl…
View article: Occurrence of GPS Loss of Lock Based on a Swarm Half-Solar Cycle Dataset and Its Relation to the Background Ionosphere
Occurrence of GPS Loss of Lock Based on a Swarm Half-Solar Cycle Dataset and Its Relation to the Background Ionosphere Open
This paper discusses the occurrence of Global Positioning System (GPS) loss of lock events obtained by considering total electron content (TEC) measurements carried out by the three satellites of the European Space Agency Swarm constellati…
View article: Sign-Singularity Analysis of Field-Aligned Currents in the Ionosphere
Sign-Singularity Analysis of Field-Aligned Currents in the Ionosphere Open
Field-aligned currents (FACs) flowing in the auroral ionosphere are a complex system of upward and downward currents, which play a fundamental role in the magnetosphere–ionosphere coupling and in the ionospheric heating. Here, using data f…
View article: Dependence of Parallel Electrical Conductivity in the Topside Ionosphere on Solar and Geomagnetic Activity
Dependence of Parallel Electrical Conductivity in the Topside Ionosphere on Solar and Geomagnetic Activity Open
The spatial and temporal dynamics of ionospheric currents are among the most evident manifestations of the interaction between the magnetized plasma of solar origin and the magnetosphere‐ionosphere system. In this context, a special role i…
View article: Looking for a proxy of the ionospheric turbulence with Swarm data
Looking for a proxy of the ionospheric turbulence with Swarm data Open
The present work focuses on the analysis of the scaling features of electron density fluctuations in the mid- and high-latitude topside ionosphere under different conditions of geomagnetic activity. The aim is to understand whether it is p…
View article: On Magnetic Helicity and Field-Aligned Currents in the Polar Ionosphere
On Magnetic Helicity and Field-Aligned Currents in the Polar Ionosphere Open
<p>Magnetic helicity, which is a measure of twist and linkage of magnetic field lines, is a useful quantity to investigate some processes occurring in space plasmas. In particular, there is a strong link between magnetic helicity, ma…
View article: Climatology of very high ionospheric electron temperature occurrences as observed by Swarm constellation
Climatology of very high ionospheric electron temperature occurrences as observed by Swarm constellation Open
<p>After more than seven years in orbit, the ESA Swarm satellites have provided an already large statistics of measurements of several important physical parameters of the ionosphere. In particular, electron density and temperature a…