A5078999975- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- GNSS positioning and interference
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- earthquake and tectonic studies
- Oceanographic and Atmospheric Processes
- Planetary Science and Exploration
- Atmospheric Ozone and Climate
- Mass Spectrometry Techniques and Applications
- Spacecraft Design and Technology
- Geophysics and Sensor Technology
- Ocean Waves and Remote Sensing
- Geophysical and Geoelectrical Methods
- AI and HR Technologies
- Seismic Waves and Analysis
- Statistical and numerical algorithms
- Education, Management, Technology, Human Resources
- Advanced Chemical Sensor Technologies
- Magnetic confinement fusion research
- Magnetic Field Sensors Techniques
- Analytical Chemistry and Sensors
- Meteorological Phenomena and Simulations
- Astro and Planetary Science
Istituto Nazionale di Geofisica e Vulcanologia
2019-2025
Radiotelevisione Italiana (Italy)
2021-2024
University of Bologna
2015-2018
Sapienza University of Rome
2014-2015
Institute of Atmospheric Sciences and Climate
2015
On 8 May 2024, the solar active region AR13664 started releasing a series of intense flares. Those class X released between 9 and 11 2024 gave rise to chain fast Coronal Mass Ejections (CMEs) that proved be geoeffective. The Storm Sudden Commencement (SSC) resulting geomagnetic storm was registered on 10 it is, date, strongest event since November 2003. storm, named hereafter Mother’s Day peaked with Dst –412 nT stands out as “standard candle” affecting modern era technologies prone Space...
Abstract. On 25 August 2018 the interplanetary counterpart of 20 coronal mass ejection (CME) hit Earth, giving rise to a strong G3 geomagnetic storm. We present description whole sequence events from Sun ground as well detailed analysis observed effects on Earth's environment by using multi-instrumental approach. studied ICME (interplanetary-CME) propagation in space up its magnetosphere, ionosphere and at level. To accomplish this task, we used ground- space-collected data, including data...
The analytical description of the topside ionosphere included in NeQuick model is studied detail. First, modeled scale height behavior analyzed at infinity and for lowest part region; latter case, analysis done through an expansion Taylor series near F2-layer peak. Moreover, significant influence three parameters modeling profile investigated detail and, particular, it shown that assumes a linearly increasing trend height. Second, formulation inverted to derive fully expression as function...
Abstract Electron density ( N e ) and electron temperature T observations collected by Langmuir Probes on board the European Space Agency (ESA) Swarm B satellite are used to characterize their correlation in topside ionosphere at an altitude of about 500 km. Spearman coefficient values R calculated joint probability distributions between for selected conditions. The large data set 2‐Hz rate, covering years 2014–2022, allowed investigating properties ionospheric plasma a global scale,...
This study focuses on the open question of electron temperature (Te) variation with solar activity in topside ionosphere at mid- and high latitudes. It takes advantage situ observations taken over a decade (2014–2023) from Langmuir probes board low-Earth-orbit Swarm B satellite spanning an altitude range 500–530 km. The also includes comparison Te values modeled using International Reference Ionosphere (IRI) model Millstone Hill (42.6° N. 71.5° W) incoherent scatter radar observations....
We investigate the response of plasmasphere-ionosphere dynamic system over Europe during Mother’s Day super intense geomagnetic storm that occurred in May 2024 (Sym-H: −518 nT). Specifically, we reconstruct equatorial plasma mass densities derived from field line resonance observations at European quasi-Meridional Magnetometer Array (EMMA). The ionospheric is investigated by analysing vertical total electron content (vTEC), and its topside (tTEC) bottomside (bTEC)...
Preliminary Swarm Langmuir probe measurements recorded during March 2015, a period of time including the St. Patrick storm, are considered. Specifically, six periods identified: two quiet before onset main phase and recovery storm. electron density values then compared with corresponding output given by International Reference Ionosphere (IRI) model, according to its three different options for modelling topside ionosphere. Since still undergoing thorough validation, comparison IRI in terms...
Abstract The ionospheric topside representation made by the NeQuick model is improved correcting H 0 parameter used to calculate scale height. task accomplished fitting analytical function through two anchor points: F2-layer absolute electron density maximum; value as measured Swarm satellites from December 2013 September 2018. Specifically, two-dimensional grids of a fo F2 and hm are obtained, one employing data A C, both flying at about 460 km altitude, other B, 520 altitude. These...
The topside ionosphere extends from the F2-layer peak, where electron density reaches its absolute maximum in ionosphere, to overlying plasmasphere and magnetosphere. In decreases with height a vertical variation rate strongly dependent on itself. last version of International Reference Ionosphere (IRI) model, i.e., IRI-2020, describes this complex behavior through four options based different sub-models (i.e., options) developed 1970s present. All these have common peak as an anchor point,...
Abstract An intense surge in the equatorial electron temperature (T e ) at sunrise, known as morning T overshoot, has been one of defining ionospheric features since its discovery early Space Age. Despite decades study, behavior overshoot during geomagnetic storms remains poorly understood. We report a two-stage response to activity, uncovered by neural network model. Electron temperatures show an initial enhancement storm’s main phase, followed drastic depletion exceeding 1000 K and...
On 8 May 2024, the solar active region AR13664 started releasing a series of intense flares. Those class X released between 9 and 11 2024 gave rise to chain fast Coronal Mass Ejections (CMEs) that proved be geoeffective. The Storm Sudden Commencement (SSC) resulting geomagnetic storm was registered on 10 it is, date, strongest event since November 2003. storm, named hereafter Mother’s Day peaked with Dst -412 nT exhibited almost no substorm signatures in recovery phase.This study...
NeQuick is a global empirical model describing the median climatological behavior of electron density in ionosphere–plasmasphere system. allows fast calculation total content (TEC) values up to GNSS heights by numerical integration modeled profile, making valuable for use many geodetic and space weather applications. To ensure highest reliability TEC predictions, an accurate description topside ionosphere region overlying plasmasphere fundamental since they contain largest fraction...
An intense surge in equatorial electron temperature (Te) at sunrise, known as the morning Te overshoot, has been one of most widely studied ionospheric features since its discovery early Space Age. Despite extensive research, behavior during geomagnetic storms remains poorly understood. Using global observations by CHAllenging Minisatellite Payload (CHAMP) mission 2002-2010, we develop a neural network model, which helped us uncover two-stage response overshoot to activity. During...
Abstract In this paper, a procedure for updating the International Reference Ionosphere (IRI) model by means of assimilated vertical total electron content (vTEC) measurements from Global Navigational Satellite Systems (GNSS) receiver network is presented. This stands as an additional implementation IRI UPdate (IRI UP) method, which based on assimilation ionosonde derived F2 layer ionospheric characteristics. According to this, mathematical obtaining fo and M (3000)F2 values vTEC here...
Abstract. This paper describes a study of the daily variability shown by main characteristics sporadic E (Es) layer, that is top frequency (ftEs) and lowest virtual height (h'Es). The based on ionograms recorded Advanced Ionospheric Sounder Istituto Nazionale di Geofisica e Vulcanologia (AIS-INGV) ionosondes installed in ionospheric stations at Rome (41.8° N, 12.5° E) Gibilmanna (37.9° 14.0° E), Italy, during summer (June, July, August September) 2013, year falling ascending phase solar...
Abstract An empirical method to model the lower part of ionospheric topside region from F 2 layer peak height about 500–600 km altitude over European is proposed. The based on electron density values recorded December 2013 June 2016 by Swarm satellites and foF hmF provided IRI UP (International Reference Ionosphere UPdate), which a developed update relying assimilation M (3000) data routinely network ionosonde stations. Topside effective scale heights are calculated fitting some definite...
Abstract The scaling features of electron density fluctuations during the St. Patrick's magnetic storm (17 March 2015) are analyzed to try characterize possible turbulent nature ionosphere development geomagnetic storm. values recorded by two three satellites Swarm constellation a period 7 days (16–22 around peak at middle‐ and high‐latitude regions in both hemispheres. analysis reveals interesting patterns properties explanation for occurrence high Rate change Of Density Index (RODI)....
Abstract The present work focuses on the analysis of scaling features electron density fluctuations in mid- and high-latitude topside ionosphere under different conditions geomagnetic activity. aim is to understand whether it possible identify a proxy that may provide information properties physical mechanisms at their origin, as for instance, turbulence phenomena. So, we selected about 4 years (April 2014–February 2018) 1 Hz measurements recorded on-board ESA Swarm A satellite. Using...
The ionospheric equivalent slab thickness (τ), defined as the ratio of vertical total electron content (vTEC) to F2-layer density maximum (NmF2), is a parameter providing useful information on shape profile. However, use this difficult practical application in empirical ionosphere models, such NeQuick model, because by design they do not explicitly include τ modelling parameter. In work, we investigated opportunity using measured values improve profile NeQuick. Measured were obtained through...
Abstract An accurate modeling of the ionosphere electron density is pivotal to guarantee effective operation communication and navigation systems, particularly during Space Weather events. Despite crucial contribution empirical models like International Reference Ionosphere (IRI), their limitations in predicting ionospheric variability, especially under geomagnetically disturbed conditions, are acknowledged. The solution proposed this work involves integrating real‐time, spatially...