Eugenio Realini

Eugenio Realini
Geomatics Research & Development s.r.l. | GReD · GNSS R&D

Ph.D.
Managing GNSS-related R&D projects

About

92
Publications
38,777
Reads
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879
Citations
Introduction
Research topics: - Troposphere analysis and precipitable water vapor retrieval by GNSS measurements - Positioning accuracy enhancement of low-cost GNSS receivers - Development of open source GNSS positioning software (http://www.gogps-project.org)
Additional affiliations
April 2014 - present
Geomatics Research & Development (GReD) srl
Position
  • Senior Researcher
Description
  • High-precision GNSS positioning by low-cost receivers and GNSS meteorology
May 2011 - March 2014
Kyoto University
Position
  • PostDoc Position
Description
  • GNSS Meteorology by using GPS and QZSS positioning signals
September 2009 - April 2011
Osaka City University
Position
  • Postdoctoral Researcher (JSPS)
Description
  • Postdoctoral Fellowship by JSPS (Japan Society for the Promotion of Science). The research topic involved developing software for GPS positioning with low-cost receivers and implementing it as web processing service.
Education
January 2005 - December 2009
Politecnico di Milano
Field of study
  • Geodesy and Geomatics
October 2003 - October 2005
Politecnico di Milano
Field of study
  • Environmental Engineering
October 2000 - September 2003
Politecnico di Milano
Field of study
  • Environmental Engineering

Publications

Publications (92)
Article
Full-text available
This work describes a system aimed at the near realtimemonitoring of precipitable water vapor (PWV) by means of a dense network of Global Navigation Satellite System (GNSS) receivers. These receivers are deployed with a horizontal spacing of 1-2 km around the Uji campus of Kyoto University, Japan. The PWV observed using a standard GPS meteorology t...
Article
Full-text available
goGPS is a free and open source satellite positioning software package aiming to provide a collaborative platform for research and teaching purposes. It was first published in 2009 and since then several related projects are on-going. Its objective is the investigation of strategies for enhancing the accuracy of low-cost single-frequency GPS receiv...
Article
Full-text available
The recent access to GNSS (Global Navigation Satellite System) phase observations on smart devices, enabled by Google through its Android operating system, opens the possibility to apply precise positioning techniques using off-the-shelf, mass-market devices. The target of this work is to evaluate whether this is feasible, and which positioning acc...
Article
Full-text available
This paper presents the first experimental results of a study on the ingestion in the Weather Research and Forecasting (WRF) model, of Sentinel satellites and Global Navigation Satellite Systems (GNSS) derived products. The experiments concern a flash-floodevent occurred in Tuscany (Central Italy) in September 2017. The rationale is that numerical...
Article
Full-text available
The Mediterranean region is frequently struck by severe rainfall events causing numerous casualties and several million euros of damages every year. Thus, improving the forecast accuracy is a fundamental goal to limit social and economic damages. Numerical Weather Prediction (NWP) models are currently able to produce forecasts at the km scale grid...
Article
Full-text available
One of the challenges for meteorologists is to forecast severe weather events developing at small spatial and temporal scales. The H2020 SESAR project "Satellite-borne and IN-situ Observations to Predict The Initiation of Convection for ATM" (SINOPTICA) aims at improving the performances of the numerical weather prediction model to nowcast severe w...
Conference Paper
One of the challenges for meteorologists is to forecast severe weather events developing at small spatial and temporal scales. The H2020 SESAR project "Satellite-borne and IN-situ Observations to Predict The Initiation of Convection for ATM" (SINOPTICA) aims at improving the performances of the numerical weather prediction model to nowcast severe w...
Conference Paper
The prediction of rapidly developing thunderstorms in small and localized areas is a challenge for the scientific community. Quickly developing but intense thunderstorms are usually characterized by large hail size, huge amount of rain in a short period, high lightning frequency and strong winds thus potentially capable to affect people and socio-e...
Article
Full-text available
In this article, we report the first investigation over time of the atmospheric conditions around terrestrial gamma-ray flash (TGF) occurrences, using GPS sensors in combination with geostationary satellite observations and ERA5 reanalysis data. The goal is to understand which characteristics are favorable to the development of these events and to...
Preprint
In this article we report the first investigation over time of the atmospheric conditions around TGFs occurrence, using GPS sensors in combination with geostationary satellite observations and ERA5 reanalyses data. The goal is to understand which characteristics are favourable to the development of these events and to investigate if any precursor s...
Chapter
In the last decades, the great availability of data and computing power drove the development of powerful machine learning techniques in many research areas, including the ones, as the meteorology, where traditional conceptual models were usually adopted. In this work, we analyze the performance obtained by different techniques in the forecasting o...
Conference Paper
Full-text available
Severe weather events locally developing in a short time range are one of the major risks for aviation safety. Nowcasting and understanding the initiation of storm cells is still a challenging topic for meteorology and atmospheric physics. We combined the use of weather radar, weather stations and ground-based GNSS receivers to characterize the sev...
Chapter
The availability of atmospheric water vapor content observations, with high temporal and spatial resolution, proved to have a high impact in the prediction of heavy rain events obtained from numerical weather prediction models. Several techniques can be applied to derive such observations. Some of them are well consolidated, some others are still u...
Chapter
The use of low-cost GNSS stations for meteorological applications requires the modeling of ionospheric errors. Although low-cost dual-frequency receivers are now available, current ones are still missing the L2 frequency and this prevents the availability of iono-free observations. This second frequency can be predicted by exploiting dual-frequency...
Article
Full-text available
A prototype of a low-cost GNSS (Global Navigation Satellite System) monitoring system was installed on a deep-seated landslide in northwestern Slovenia to test its performance under field conditions. The system consists of newly developed GNSS stations based on low-cost, dual-frequency receivers and open-source GNSS processing software. It automati...
Article
Full-text available
Atmospheric Phase Screens (APSs) derived from Interferometric Synthetic Aperture Radar (InSAR) observations contain the difference between the tropospheric water vapor induced delay of two acquisition epochs, i.e. the slave and the master (or reference) epochs. Using estimates of the atmospheric state coming from independent sources, for example nu...
Article
Full-text available
A Synthetic Aperture Radar can offer not only an accurate monitoring of the earth surface deformation, but also information on the troposphere, such as the total path delay or the columnar water vapor at high horizontal resolution. This can be achieved by a proper interferometric processing and post-processing of the radar interferograms. The fine...
Conference Paper
Full-text available
Monitoring and predicting extreme atmospheric events, such as deep convective systems, is very challenging especially when they develop locally in a short time range. Despite the great improvement in model parametrization and the use of satellite measurements, there are still large uncertainties on the knowledge of the dynamical processes of deep c...
Presentation
Full-text available
Multipath mitigation approach implemented in goGPS. This presentation is a modified version of the previous presented in Luxembourg, here with improved descriptions and new figures for the EGU2020 General Assembly. The strategy uses Zernike polynomials interpolation and high-resolution gridding to compute multipath maps from the residuals of the G...
Presentation
Full-text available
Receiver antenna calibration plays an important role in precise point positioning (PPP). Correct management of multipath effects can improve the estimation of tropospheric parameters and the stability of the coordinates over short measurement sessions. In the years, many techniques have been developed to mitigate multipath effects, among them multi...
Article
Full-text available
This paper proposes a simple and fast method to estimate Atmospheric Phase Screens (APSs) by jointly exploit a stack of Synthetic Aperture Radar (SAR) images and a dataset of GNSS-derived atmospheric product. The output of this processing is conceived to be ingested by Numerical Weather Prediction Models (NWPMs) to improve weather forecasts. In ord...
Article
Full-text available
The accuracy of surface meteorological measurements is vital to derive accurate Global Positioning System (GPS) Precipitable Water Vapour (PWV) data. However, in absence of surface meteorological data, data from Numerical Weather Prediction Models (NWP) are used. The accuracy of these models varies depending on the model, region, season and other c...
Conference Paper
Full-text available
Global Navigation Satellite System (GNSS) have been routinely used in the last decades to estimate water vapor content in the lower part of the atmosphere. Water vapor measurements have been successfully integrated in Numerical Weather Prediction (NWP) models, showing a positive impact on the forecast of rain events. Since few years, it is possible...
Conference Paper
Full-text available
In the last few years, many studies claimed that machine learning tools would soon overperform the classical conceptual models in extreme rainfall events forecasting. In order to better investigate this statement, we implement advanced deep learning predictors, such as the deep neural nets, for the forecasting of the occurrence of extreme rainfalls...
Poster
Full-text available
Goal of the project was to investigate whether the assimilation of high resolution Earth Observation variables improve the forecast of heavy rain events. Several experiments were conducted assimilating soil moisture, surface wind, sea surface temperature, land surface temperature and zenith total delay. The assimilation of wind and water vapor cont...
Article
The Global Navigation Satellite System (GNSS) can be used to derive accurately the Zenith Tropospheric Delay (ZTD) under all-weather conditions. The derived ZTDs play a vital role in climate studies, weather forecasting and are operationally assimilated into numerical weather prediction models. In this study, variations and statistical analysis of...
Presentation
Full-text available
The new version of the open-source goGPS MATLAB software has been written to be a simple tool to perform efficient analysis of GNSS data from both geodetic and low-cost receivers. With its capability to download automatically all the resources needed by the selected algorithms, the relative easiness of use, and its flexibility with the possibility...
Poster
Full-text available
The activities carried out within the WP2 of the TWIGA-H2020 project are described. In particular, the following topics are covered: the definition of a new low-cost GNSS receiver network to be soon installed in Uganda, a new algorithm for the retrieval of water vapor maps from Sentinel-1 data and the ongoing numerical weather prediction experiment...
Article
Full-text available
A new low-cost L1/L2c receiver board is presented in this short letter, along with its first tests. The main strength of the board is its low price tag (around 200 EUR, in quantities of hundreds) as an effective dual-frequency receiver. The effectiveness of the receiver was at first proven by a pedestrian walk experiment on a closed loop, allowing...
Article
Full-text available
GNSS atmospheric water vapor monitoring is not yet routinely performed in Italy, particularly at the regional scale. However, in order to support the activities of regional environmental protection agencies, there is a widespread need to improve forecasting of heavy rainfall events. Localized convective rain forecasts are often misplaced in space a...
Article
Full-text available
We studied the assimilation of high-resolution precipitable water vapor (PWV) data derived from a hyper-dense global navigation satellite system network around Uji city, Kyoto, Japan, which had a mean inter-station distance of about 1.7 km. We focused on a heavy rainfall event that occurred on August 13–14, 2012, around Uji city. We employed a loca...
Article
Full-text available
Recent advances in the field of atmospheric and ionospheric sensing by GNSS and SAR technologies were discussed during two workshops held in February 2016 and October 2016 in Italy, hosted by GEOlab of Politecnico di Milano under partial support of the JSPS Bilateral Open Partnership Joint Research Projects. Another symposium was held in March 2017...
Conference Paper
The STEAM (SaTellite Earth observation for Atmospheric Modelling) project, funded by the European Space Agency, aims at investigating new areas of synergy between high-resolution numerical weather prediction (NWP) models and data from spaceborne remote sensing sensors. An example of synergy is the incorporation of high-resolution remote sensing dat...
Article
Full-text available
Dual-frequency Global Navigation Satellite Systems (GNSSs) enable the estimation of Zenith Tropospheric Delay (ZTD) which can be converted to Precipitable Water Vapor (PWV). The density of existing GNSS monitoring networks is insufficient to capture small-scale water vapor variations that are especially important for extreme weather forecasting. A...
Article
Since many years, the GNSS has been regarded by the meteorological community as one of the systems for atmospheric water vapour remote sensing. Time series of wet delays, estimated as by-products of accurate positioning, have been assimilated into numerical weather prediction models. However, a dedicated use the system for water vapour monitoring i...
Conference Paper
The European Space Agency (ESA) STEAM (SaTellite Earth observation for Atmospheric Modelling) project aims at investigating new areas of synergy between high-resolution numerical atmosphere models and data from spaceborne remote sensing sensors, with focus on Copernicus Sentinels 1, 2 and 3 satellites. An example of synergy is the ingestion of surf...
Article
Full-text available
A pure GNSS navigation is often unreliable in urban areas because of the presence of obstructions, thus preventing a correct reception of the satellite signal. The bridging between GNSS outages, as well as the vehicle attitude reconstruction, can be recovered by using complementary information, such as visual data acquired by RGB-D or RGB cameras....
Article
Full-text available
We studied the assimilation of high-resolution precipitable water vapor (PWV) data derived from a hyper-dense global navigation satellite system network around Uji city, Kyoto, Japan, which had a mean inter-station distance of about 1.7 km. We focused on a heavy rainfall event that occurred on August 13–14, 2012, around Uji city. We employed a loca...
Poster
Full-text available
goGPS is a GNSS processing software written in MATLAB, that was originally developed for precise positioning purposes, mainly based on the double-difference relative approach. To broaden its use by including also tropospheric delay estimation, all the algorithms and procedures needed to apply PPP (Precise Point Positioning) were implemented. In add...
Conference Paper
Full-text available
Geological, hydrological, geotechnical, and environmental phenomena causing deformation of the Earth surface (subsidence, landslides, floods, sinking, tectonic activity) are happening at an increasing rate, also due to extreme events likely to be driven by climate change. These phenomena govern negative and sometimes destructive impacts on land, st...
Chapter
In the last decades, low-cost GNSS receivers have been widely used for navigation purposes. Some of them deliver also raw data, allowing for a more sophisticated processing, such as the double-difference approach, and therefore a more accurate positioning, typically at the decimeter level. However, these accuracies can be generally achieved only wi...
Article
Full-text available
The estimation of the precipitable water vapour content (W) with high temporal and spatial resolution is of great interest to both meteorological and climatological studies. Several methodologies based on remote sensing techniques have been recently developed in order to obtain accurate and frequent measurements of this atmospheric parameter. Among...
Article
Full-text available
The estimation of the precipitable water vapor content (W) with high temporal and spatial resolution is of great interest in both meteorological and climatological studies. Several methodologies based on remote sensing techniques have been recently developed, in order to obtain accurate and frequent measurements of this atmospheric parameter. Among...
Article
Full-text available
Flight height is a fundamental parameter for correcting the gamma signal produced by terrestrial radionuclides measured during airborne surveys. The frontiers of radiometric measurements with UAV require light and accurate altimeters flying at some 10 m from the ground. We equipped an aircraft with seven altimetric sensors (three low-cost GNSS rece...
Article
Full-text available
The San Bernardino-Guvano landslide is one of the wider slope mass movements located along the eastern Ligurian coast between Vernazza and Corniglia, Cinque Terre National Park. It is an ancient and complex landslide that has been studied since 1853, when a catastrophic event occurred. This paper aims to describe the geomorphological evolution and...
Conference Paper
The study of reservoir behaviour is an important topic when dealing with the removal or the injection of fluids into the underground (e.g. hydrocarbon production or natural gas storage). The monitoring of surface deformations provides a valid contribution to the analysis of the reservoir. Nowadays the InSar technique is one of the most commonly use...
Article
Full-text available
The San Bernardino-Guvano landslide is one of the wider slope mass movements located along the eastern Ligurian coast between Vernazza and Corniglia, Cinque Terre National Park. It is an ancient and complex landslide that has been studied since 1853, when a catastrophic event occurred. This paper aims to describe the geomorphological evolution and...
Article
The use of geodetic techniques and in particular of the Global Positioning System (GPS), or other Global Navigation Satellite Systems (GNSS), to monitor different kinds of deformations is a common practice. This is typically performed by setting a network of geodetic GPS/GNSS receivers, allowing accuracies in the order of millimeters. The use of lo...
Poster
This paper describes an experiment of GNSS-based monitoring by means of different models and brands of low-cost receivers. Single-frequency observations were processed by goGPS software, in relative positioning mode with respect to a virtual reference station and three permanent stations. The experiment was carried out in Osaka, Japan; the results...
Conference Paper
Full-text available
In order to estimate the coordinates of a GNSS device, navigation satellites transmit a precise reference clock and their orbit parameters. However, if the received signal is very weak or too short, traditional positioning algorithms cannot be applied. A technique known as Coarse Time Navigation or Snapshot Positioning addresses this problem by pro...
Conference Paper
Full-text available
This paper describes an experiment of GNSS-based monitoring by means of different models and brands of low-cost receivers. Single-frequency observations were processed by goGPS software, in relative positioning mode with respect to a virtual reference station and three permanent stations. The experiment was carried out in Osaka, Japan; the results...
Article
Full-text available
goGPS is a positioning software application designed to process single-frequency code and phase observations for absolute or relative positioning. Published under a free and open-source license, goGPS can process data collected by any receiver, but focuses on the treatment of observations by low-cost receivers. goGPS algorithms can produce epoch-by...
Article
Full-text available
goGPS is a positioning software application designed to process single-frequency code and phase observations for absolute or relative positioning. Published under a free and open-source license, goGPS can process data collected by any receiver, but focuses on the treatment of observations by low-cost receivers. goGPS algorithms can produce epoch-by...
Article
Full-text available
Water vapor variations associated with a meso-γ scale convection were investigated using GNSS (Global Navigation Satellite System) derived PWV (precipitable water vapor) and high resolution numerical model data with a 250 m horizontal grid interval. A rapid increase of GNSS-derived PWV that occurred prior to the initiation of surface rainfall was w...