Luca Spogli

Luca Spogli
National Institute of Geophysics and Volcanology | INGV · Section of Geomagnetism, Aeronomy and Environmental Geophysics

PhD

About

132
Publications
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6,958
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Publications

Publications (132)
Presentation
Full-text available
On the use of the IRI UP method to assimilate IONORING vTEC data to predict foF2 over Italy for Space Weather alert purposes
Presentation
Full-text available
Presentation on "Predicting the critical frequency foF2 over Europe through the assimilation of vTEC measurements from EUREF and RING networks" given at the URSI GASS 2021 in Rome.
Article
Full-text available
The geomagnetic storm that occurred on 25 August 25 2018, that is, during the minimum of solar cycle 24, is currently the strongest ever probed by the first China Seismo‐Electromagnetic Satellite (CSES‐01). By integrating the in situ measurements provided by CSES‐01 (orbiting at altitude of 507 km) and by Swarm A satellite (orbiting at ca., 460 km)...
Article
Full-text available
Equatorial plasma bubbles (EPBs) can cause rapid fluctuations in amplitude and phase of radio signals traversing the ionosphere and in turn produce serious ionospheric scintillations and disrupt satellite-based communication links. Whereas numerous studies on the generation and evolution of EPBs have been performed, the prediction of EPB and ionosp...
Article
Full-text available
A possible driver of precipitation of magnetospheric energetic electrons in the high-latitude atmosphere is represented by electromagnetic ion-cyclotron (EMIC) magnetospheric waves. The precipitating particles produce variations, by collision, in the ionized component of the atmosphere, altering its chemistry and electrical conductivity, with a sig...
Research Proposal
Full-text available
SCAR has provided a unique international platform to exchange data and knowledge in this area. Now, the main challenges are to better understand the coupling between the neutral and the ionized layers of our atmosphere, and to be able to test the accuracy of the atmospheric correction given to end-users. Another challenge is to provide accurate mon...
Article
Full-text available
Periods of accelerated seismicity have been observed during the preparation process of many large earthquakes. This accelerating seismicity can be detected by the Accelerated Moment Release (AMR) method and its recent Revised version (R-AMR) when the two techniques are applied to earthquake catalogues. The main aim of this study is to investigate t...
Article
Full-text available
The study of the preparation phase of large earthquakes is essential to understand the physical processes involved, and potentially useful also to develop a future reliable short-term warning system. Here we analyse electron density and magnetic field data measured by Swarm three-satellite constellation for 4.7 years, to look for possible in-situ i...
Article
Full-text available
We analyze the amplitude scintillation on L-band signals over San Miguel de Tucumán (Argentina), focusing on the multi-scale variability and speculating on the possible relationship between forcing factors from the geospace and the ionospheric response. The site is nominally located below the expected position of the southern crest of the Equatoria...
Article
Full-text available
This paper presents how the magnetosphere–plasmasphere–ionosphere system was affected as a whole during the geomagnetic storm peaking on 27 May 2017. The interplanetary conditions, the magnetospheric response in terms of the magnetopause motion, and the ionospheric current flow pattern were investigated using data, respectively, from the WIND space...
Article
Full-text available
In early September 2017, several space weather events triggered disturbed conditions of the near‐Earth space. The combination of two coronal mass ejection arrivals, associated with an X‐class flare, caused a strong geomagnetic storm on 7 and 8 September, thus inducing diffuse ionospheric phase scintillations on Global Navigation Satellite System (G...
Article
A new method for analyzing travelling ionospheric disturbances (TIDs) is developed by using two B-spline basis functions of degree 4 on the Total Electron Content (TEC) data from the ground-based Global Positioning System (GPS) receivers. This method enhances the spatial resolution to about 0.1° (geographic latitude) × 0.1° (geographic longitude),...
Conference Paper
Full-text available
The evaluation of the external origin contribution (BEXT and EEXT) in geomagnetic field satellite observations in the near Earth location (1.2 RE<R<1.5 RE; RE being the Earth radius) during active magnetic conditions is one of the key problem in the Space Weather context. We propose an innovative algorithm able to discriminate the external from the...
Poster
Full-text available
The deep knowledge about the electric fields ruling the ionospheric electrodynamics is of crucial importance to understand both the ionospheric physics and the lithosphere-atmosphere-ionosphere coupling (LAIC). In particular, the occurrence of electromagnetic anomalies possibly related to the preparatory phases of large earthquakes requires disenta...
Article
Biomass is a spaceborn polarimetric P-band (435 MHz) synthetic aperture radar (SAR) in a dawn-dusk low Earth orbit. Its principal objective is to measure biomass content and change in all the Earth's forests. The ionosphere introduces the Faraday rotation on every pulse emitted by low-frequency SAR and scintillations when the pulse traverses a regi...
Article
The storm onset of the so-called “St. Patrick's day geomagnetic storm”, on March 17th, 2015 triggered several fluctuations of the electron density in the ionosphere causing severe scintillations at high latitudes of both hemispheres. Leveraging on ground-based Global Navigation Satellite Systems (GNSS) receivers we investigate the ionospheric respo...
Article
The total electron content (TEC) measured from the interferometric synthetic aperture radar (InSAR) and from a dense network of global navigation satellite system (GNSS) receivers are used to assess the capability of InSAR to retrieve ionospheric information, when the tropospheric contribution to the interferometric phase is reasonably negligible....
Poster
Full-text available
Interplanetary analysis Introduction. The Solar Wind-Magnetosphere-Ionosphere coupling constitutes an important subject of scientific interest, in particular in the Space Weather context. Briefly, in this process, the energy is transferred from the solar wind to the magnetosphere by means of both the magnetic reconnection at the dayside magnetopaus...
Conference Paper
Full-text available
Many real life signals, and in particular in the space physics domain, exhibit variations across different temporal scales. Hence, their statistical momenta may depend on the time scale at which the signal is studied. To identify and quantify such variations, a time-frequency analysis has to be performed on these signals. The dependence of the stat...
Article
Full-text available
Ionosonde data and crustal earthquakes with magnitude M ≥ 6.0 observed in Greece during the 2003–2015 period were examined to check if the relationships obtained earlier between precursory ionospheric anomalies and earthquakes in Japan and central Italy are also valid for Greek earthquakes. The ionospheric anomalies are identified on the observed v...
Article
Full-text available
Geosystemics (De Santis 2009, 2014) studies the Earth system as a whole focusing on the possible coupling among the Earth layers (the so called geo-layers), and using universal tools to integrate different methods that can be applied to multi-parameter data, often taken on different platforms. Its main objective is to understand the particular phen...
Article
Many real life signals, and in particular in the space physics domain, exhibit variations across different temporal scales. Hence, their statistical momenta may depend on the time scale at which the signal is studied. To identify and quantify such variations, a time-frequency analysis has to be performed on these signals. The dependence of the stat...
Poster
Full-text available
Analysis of the radio scintillation and ionospheric fluctuation data at low latitude focusing on the time and space multi-scale variability and on the causal relationship between forcing factors from the SW environment and the ionospheric response.
Poster
Full-text available
Hemispheric asymmetry of ionospheric scintillations during the 2015 St. Patrick’s Day storm
Article
Full-text available
A full-halo coronal mass ejection (CME) left the Sun on 21 June 2015 from Active Region (AR) NOAA 12371. It encountered Earth on 22 June 2015 and generated a strong geomagnetic storm whose maximum Dst value was −204 nT. The CME was associated with an M2-class flare observed at 01:42 UT, located near disk center (N12 E16). Using satellite data from...
Article
Full-text available
The ionospheric response at middle and high latitudes in the Antarctica American and Australian sectors to the 26–27 September 2011 moderately intense geomagnetic storm was investigated using instruments including an ionosonde, riometer, and GNSS receivers. The multi-instrument observations permitted us to characterize the ionospheric storm-enhance...
Poster
The storm onset on March 17th, 2015 triggered several fluctuations of the electron density in the ionosphere causing severe scintillations at polar latitudes of both hemispheres. Thanks to the availability of data acquired by ground based GNSS receivers, we investigate the ionospheric response in terms of Global Positioning System (GPS) phase scint...
Article
The aim of the Ionosphere Prediction Service (IPS) project is to design and develop a prototype platform to translate the prediction and forecast of the ionosphere effects into a service customized for specific GNSS user communities. The project team is composed by Telespazio (coordinator), Nottingham Scientific Ltd, Telespazio Vega Deutschland, th...
Article
The ERICA study aims to find out signatures of the interplay between the magnetosphere-geomagnetic field and the ionosphere that degrade trans-ionospheric signals such as those transmitted by GNSS satellites. The project activity focuses on the characterization of the ionospheric variability of the Equatorial Ionospheric Anomaly in the South East A...
Conference Paper
The storm onset on March 17th, 2015 triggered several fluctuations of the electron density in the ionosphere causing severe scintillations at polar latitudes of both hemispheres. The GPS Scintillation and TEC Monitors located at Eureka (79.99°N, 274.10°E), Concordia (75.10°S, 123.35°E), Resolute Bay (74.75 °N, 265.00 °E) and Baia Terranova (74.41°S...
Article
WAM is realized making use of the plasma density data collected via the retarding potential analyser on board the Dynamics Explorer 2 spacecraft, capable to model the scintillation climatology over the northern hemisphere high latitude ionosphere. More recently, WAM has been tuned to model the ionospheric scintillations also over the equatorial lat...
Conference Paper
Full-text available
Radio power scintillation, namely highly irregular fluctuations of the power of trans-ionospheric GNSS signals, is the effect of ionospheric plasma turbulence. The scintillation patterns on radio signals crossing the medium inherit the ionospheric turbulence characteristics of inter-scale coupling, local randomness and large time variability. On th...
Conference Paper
Full-text available
Nonlinear and nonstationary signals are ubiquitous in real life. Their decomposition and analysis is of crucial importance in many research fields. Traditional techniques, like Fourier and wavelet Transform have been proved to be limited in this context. In the last two decades new kind of nonlinear methods have been developed which are able to unr...
Article
We provide insights about how the Total Electron Content (TEC), derived by a network of Global Navigation Satellite System (GNSS) receivers over the European longitudinal sector, reacts to a Sudden Impulse (SI). In particular, we investigate how the different components of the TEC variability relates with the ionospheric currents, derived by ground...
Article
Full-text available
The CSES satellite, developed by Chinese (CNSA) and Italian (ASI) space Agencies, will investigate iono-magnetospheric disturbances (induced by seismicity and electromagnetic emissions of tropospheric and anthropogenic origin); will monitor the temporal stability of the inner Van Allen radiation belts and will study the solar-terrestrial coupling b...
Article
Full-text available
The brokering approach can be successfully used to overcome the crucial question of searching among enormous amount of data (raw and/or processed) produced and stored in different information systems. In this paper, authors describe the Data Management System the DMS (Data Management System) developed by INGV (Istituto Nazionale di Geofisica e Vulc...
Article
Full-text available
We investigate the geospace response to the 2015 St. Patrick's Day storm leveraging on instruments spread over South East Asia (SEA), covering a wide longitudinal sector of the low latitude ionosphere. A regional characterization of the storm is provided, identifying the peculiarities of ionospheric irregularities formation. The novelties of this w...
Article
ESPAS, the “near-Earth space data infrastructure for e-science” is a data e-infrastructure facilitating discovery and access to observations, ground-based and space borne, and to model predictions of the near-Earth space environment, a region extending from the Earth’s atmosphere up to the outer radiation belts. ESPAS provides access to metadata an...
Book
Full-text available
The definite identification of the characteristics of the geomagnetic response to Solar Wind (SW) pressure changes represents an interesting element of the magnetospheric dynamics that is also important in the Space Weather context. In the present analysis, we discriminate between magnetospheric (DL) and ionospheric (DP) contributions in the ground...
Conference Paper
Full-text available
We assess the relationship between ionospheric currents derived by ground magnetometers and Total Electron Content (TEC) derived by GNSS receivers over the European longitudinal sector during the Sudden Impulse (SI) of the 2015 Saint Patrick's day Storm. Since changes in the ionospheric currents are expected to be related to the temporal variation...
Conference Paper
Full-text available
The storm onset on the St. Patrick day of March 2015 triggered several fluctuations of the electron density causing severe scintillations at polar latitudes of both hemispheres. L-band monitoring of the ionosphere can be accomplished by means of specially modified GNSS (Global Navigation Satellite Systems) receivers capable to sample the received s...
Conference Paper
INGV is operating a network of GNSS (GPS, GLONASS, Galileo) receivers, especially modified to monitor the perturbations of the high latitudes upper atmosphere. In particular, the first GPS receiver was installed in 2003 at Ny-Ålesund (Svalbard Island, 78°55′30″N 11°55′20″E). The combined analysis of the scintillations parameters (S4 and Sigma_phi)...
Article
Ionospheric scintillation is caused by irregularities in the ionospheric electron density. The characterization of ionospheric irregularities is important to further our understanding of the underlying physics. Our goal is to characterize the intermediate (0.1-10 km) to medium (10-100 km) scale high latitude irregularities which are likely to produ...
Article
Ionospheric scintillation occurs mainly at high and low latitude regions of the Earth and may impose serious degradation on GNSS (Global Navigation Satellite System) functionality. The Brazilian territory sits on one of the most affected areas of the globe, where the ionosphere behaves very unpredictably, with strong scintillation frequently occurr...
Conference Paper
Full-text available
The definite identification of the characteristics of the geomagnetic response to Solar Wind (SW) pressure changes represents an interesting element of the magnetospheric dynamics that is also important in the Space Weather context. In the present analysis, we discriminate between magnetospheric (DL) and ionospheric (DP) contributions in the ground...
Conference Paper
Full-text available
Highly irregular fluctuations of the power of trans-ionospheric GNSS signals, namely radio power scintillation, are, at least to a large extent, the effect of ionospheric plasma turbulence, a by-product of the non-linear and non-stationary evolution of the plasma fields defining the Earth’s upper atmosphere. One could expect the ionospheric turbule...
Conference Paper
Full-text available
Trans-ionospheric waves experience delay proportional to the Total Electron Content (TEC), being the number of free electrons present along a satellite-receiver ray path. TEC is a highly variable quantity, influenced by different helio-geophysical parameters, such as solar activity, season, time of the day, etc. Such large variability may lead to T...
Article
Full-text available
This work presents a contribution to the understanding of the ionospheric triggering of L-band scintillation in the region over Sao Paulo state in Brazil, under high solar activity. In particular, a climatological analysis of Global Navigation Satellite Systems (GNSS) data acquired in 2012 is presented to highlight the relationship between intensit...
Article
In the last years, the use of GNSS (Global Navigation Satellite Systems) data has been gradually increasing, for both scientific studies and technological applications. High-rate GNSS data, able to generate and output 50-Hz phase and amplitude samples, are commonly used to study electron density irregularities within the ionosphere. Ionospheric irr...
Presentation
Full-text available
The dispersive effect of the ionosphere on Synthetic Aperture Radar (SAR) images
Conference Paper
GINESTRA and ERICA are two projects funded in the framework of the ALCANTARA Initiative of the European Space Agency. GINESTRA is a survey aimed to explore the capabilities of ionosphere monitoring in South East Asia (SEA) and the Pacific region in order to identify institutions involved in this field and existing monitoring facilities which could...
Conference Paper
IDIPOS, that stands for Italian Database Infrastructure for Polar Observation Sciences, has been conceived to realize a feasibility study on infrastructure devoted to management of data coming from Polar areas. This framework adopted a modular approach identifying two main parts: the first one defines main components of infrastructure, and, the lat...