Use of CORS Time Series for Geodynamics Applications in Western Sicily (Italy)

Pipitone, C.; Dardanelli, Gino; Brutto, Mauro Lo; Bruno, Valentina; Mattia, M.; Guglielmino, Francesco; Rossi, M.; Barreca, Giovanni

doi:10.1007/978-3-030-62800-0_6

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…The last multidisciplinary research resulted in the integration of GNSS and InSAR (interferometric synthetic aperture radar) data [117]. Combined investigations discovered the potential seismogenic sources of destructive earthquakes documented in south-western Sicily.…”

Section: Monitoring and Displacementsmentioning

confidence: 99%

A Review of Selected Applications of GNSS CORS and Related Experiences at the University of Palermo (Italy)

Pipitone,

Maltese,

Lo Brutto

et al. 2023

Remote Sensing

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Services from the Continuously Operating Reference Stations (CORS) of the Global Navigation Satellite System (GNSS) provide data and insights to a range of research areas such as physical sciences, engineering, earth and planetary sciences, computer science, and environmental science. Even though these fields are varied, they are all linked through the GNSS operational application. GNSS CORS have historically been deployed for three-dimensional positioning but also for the establishment of local and global reference systems and the measurement of ionospheric and tropospheric errors. In addition to these studies, CORS is uncovering new, emerging scientific applications. These include real-time monitoring of land subsidence via network real-time kinematics (NRTK) or precise point positioning (PPP), structural health monitoring (SHM), earthquake and volcanology monitoring, GNSS reflectometry (GNSS-R) for mapping soil moisture content, precision farming with affordable receivers, and zenith total delay to aid hydrology and meteorology. The flexibility of CORS infrastructure and services has paved the way for new research areas. The aim of this study is to present a curated selection of scientific papers on prevalent topics such as network monitoring, reference frames, and structure monitoring (like dams), along with an evaluation of CORS performance. Concurrently, it reports on the scientific endeavours undertaken by the Geomatics Research Group at the University of Palermo in the realm of GNSS CORS over the past 15 years.

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Section: Monitoring and Displacementsmentioning

confidence: 99%

A Review of Selected Applications of GNSS CORS and Related Experiences at the University of Palermo (Italy)

Pipitone,

Maltese,

Lo Brutto

et al. 2023

Remote Sensing

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“…In the last few years, the UNIPA GNSS CORS network has been involved for scientific applications in different fields, including the electromagnetic pollution monitoring via a GPS-GIS integrated system [36], the trajectories calculation of Mobile Mapping System (MMS) [37,38], the dams monitoring with integrated InSAR and GNSS techniques [39,40], the geodetic measurements of the stalactite elevation in geological analyses [41], the use of unmanned aerial vehicles for soil moisture characterization [42], the positioning and guidance of agricultural machines via GNSS [43], the monitoring of active faulting, with integrated geodetic and InSAR techniques [44,45].…”

Section: Unipa Gnss Cors Networkmentioning

confidence: 99%

NRTK, PPP or Static, That Is the Question. Testing Different Positioning Solutions for GNSS Survey

et al. 2021

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Worldwide, the determination of the coordinates from a Global Navigation Satellite System (GNSS) survey (in Network Real Time Kinematic, Precise Point Positioning, or static mode) has been analysed in several scientific and technical applications. Many of those have been carried out to compare Precise Point Positioning (PPP), Network Real Time Kinematic (NRTK), and static modes’ solutions, usually, using the latter as the true or the most plausible solution. This approach is not always possible as the static mode solution depends on several parameters (baseline length, acquisition time, ionospheric, and tropospheric models, etc.) that must be considered to evaluate the accuracy of the method. This work aims to show the comparison among the GNSS survey methods mentioned above, using some benchmark points. The tests were carried out by comparing the survey methods in pairs to check their solutions congruence. The NRTK and the static solutions refer to a local GNSS CORS network’s analysis. The NRTK positioning has been obtained with different methods (VRS, FKP, NEA) and the PPP solution has been calculated with two different software (RTKLIB and CSRS-PPP). A statistical approach has been performed to check if the distribution frequencies of the coordinate’s residual belong to the normal distribution, for all pairs analysed. The results show that the hypothesis of a normal distribution is confirmed in most of the pairs and, specifically, the Static vs. NRTK pair seems to achieve the best congruence, while involving the PPP approach, pairs obtained with CSRS software achieve better congruence than those involving RTKLIB software.

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Deformed archaeological remains at Lilybaeum in Western Sicily (southern Italy): possible ground signatures of a missed large earthquake

Barreca,

Pepe,

Sulli

et al. 2024

Nat Hazards

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Archaeoseismic analysis performed in Western Sicily points to deformed archeological remains at Lilybaeum, a Punic coastal city founded in 397 B.C. at the Island’s westernmost edge. Starting from the direct observation of deformed ruins, an interdisciplinary work strategy, which included field-structural analysis, drone-shot high-resolution aerial photogrammetry, and geophysical prospecting, was employed to investigate whether the identified deformations may represent the ground effects of a previously unknown large earthquake in the area. Among the unearthed remains, some mosaics and a stone-paved monumental avenue show evidence of tectonic deformation, being fractured, folded, and uplifted. The trend of folding and fracturing is consistent with the NNW–SSE oriented tectonic max stress axis to which Western Sicily is currently subjected. Displacement along a fracture deforming the Decumanus Maximus together with the finding of a domino-type directional collapse, enable us to interpret the observed deformation as the ground signature of a coseismic slip. The seismic rupture occurred along a previously unmapped deformation front that fits well within the seismotectonic context of Western Sicily. Measured offset, geophysical prospecting, and age-constraints all suggest the possibility that a highly-energetic earthquake nucleated in the area following a coseismic rupture along a NE–SW trending back-verging reverse fault towards the end of the fourth century CE. Since seismic catalogs do not provide evidence of such a large earthquake, this event might represent a missed entry in the historical seismic record. This finding provides constraints to redefine the seismic hazard of Western Sicily, a region where recurrence-time intervals for large earthquakes are still unknown.

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Use of CORS Time Series for Geodynamics Applications in Western Sicily (Italy)

Cited by 4 publications

References 16 publications

A Review of Selected Applications of GNSS CORS and Related Experiences at the University of Palermo (Italy)

A Review of Selected Applications of GNSS CORS and Related Experiences at the University of Palermo (Italy)

NRTK, PPP or Static, That Is the Question. Testing Different Positioning Solutions for GNSS Survey

Deformed archaeological remains at Lilybaeum in Western Sicily (southern Italy): possible ground signatures of a missed large earthquake

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