Ambrogio Manzino

Ambrogio Manzino
Politecnico di Torino | polito · DIATI - Department of Environment, Land and Infrastructure Engineering

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87
Publications
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456
Citations

Publications

Publications (87)
Article
Full-text available
Caves are one of the most important and well-known geological features in the world, an environmental and cultural heritage, as well as an important economic resource for many countries. Their scientific and aesthetic value is often threatened by tourism, which unfortunately exposes them to a series of risks of degradation and, sometimes, irreparab...
Article
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Leica Geosystems recently introduced a multi-constellation GNSS sensor named GS18i. It is capable to perform tilt compensation and has an integrated photogrammetric camera, allowing the users to measure inaccessible features: this is called visual positioning. The Laboratory of Geomatics, at the University of Pavia – Italy, performed a first evalua...
Article
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The use of a Remotely Piloted Aircraft System (RPAS) for the characterization and monitoring of landslides has been widely improved in the last decade. In particular, the use of this system is particularly effective for the study of areas prone to geohazards. Zones affected by landslides, such as rock slides and debris flows, are often quite critic...
Article
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Dense point clouds can be nowadays considered the main product of UAV (Unmanned Aerial Vehicle) photogrammetric processing and clouds registration is still a key aspect in case of blocks acquired apart. In the paper some overlapping datasets, acquired with a multispectral Parrot Sequoia camera above some rice fields, are analysed in a single block...
Chapter
The use of GNSS for landslide monitoring is not a novelty. In most cases, the GNSS receivers and antennas are only a subset of instruments usually considered and used in a complex monitoring network, where more often a continuous monitoring is required. In the present work, the proposed GNSS solution is composed by a dual frequency (L1 + L2) receiv...
Article
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Unmanned aerial vehicle (UAV) systems are heavily adopted nowadays to collect high-resolution imagery with the purpose of documenting and mapping environment and cultural heritage. Such data are currently processed by programs based on the Structure from Motion (SfM) concept, coming from the computer vision community, rather than from classical pho...
Article
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In recent years, the development of low-cost GNSS sensors allowed monitoring in a continuous way movement related to natural processes like landslides with increasing accuracy and limited efforts. In this work, we present the first results of an experimental low-cost GNSS continuous monitoring applied to an unstable slope affecting the Madonna del...
Article
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Observation and monitoring of landslides and infrastructure is a very important basis for land planning, human activities, and safety. Geomatic techniques for deformation monitoring have usually involved GNSS and total station measurements or, more generally, expensive geodetic instruments, but other techniques, such as SAR (Synthetic Aperture Rada...
Article
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Thermal perturbation produced in the subsurface by open-loop groundwater heat pumps (GWHPs) represents a complex transport phenomenon that is affected by several factors, including intrinsic characteristics of the exploited aquifer, abstraction and reinjection well features, and the temporal dynamics of the accessed groundwater. Post-GWHP water may...
Article
The use of multiple GNSS constellations has been beneficiary to positioning performances and reliability in recent times, especially in low cost mass-market setups. Along with GPS and GLONASS, GALILEO and BDS are the other two constellations aiming for global coverage. With ample research demonstrating the benefits of GALILEO in the European region...
Article
Global Navigation Satellite Systems (GNSS) technology has been a consistent alternative to monitor and detect structural deformation using geodetic receivers. The role of low cost GNSS receivers have been explored in recent years and this study proposes the use of two such receivers as master and rover respectively to detect fast deformations. Sing...
Conference Paper
Fast displacements detection in real-time is a very high challenge due to the necessity to preserve buildings, infrastructures and the human life. In this paper this problem is addressed using some statistical techniques and a GPS mass-market receiver in real-time. Very often, most of landslides monitoring and deformation analysis are carried out b...
Article
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One of the main challenges in global navigation satellite systems (GNSS) network real-time kinematic positioning is phase ambiguity estimation. We describe methods that predict false fixing (FF) of phase ambiguities in mass-market receivers. In this work, FF is defined to occur when the differences between 3D coordinates estimated in real-time diff...
Article
Kinematic satellite positioning consists in estimating the trajectory of a moving receiver, by processing observations from Global Navigation Satellite Systems (GNSS). This is a well-known technique if geodetic or GIS receivers are considered but nowadays it is also possible to make a precise positioning with other devices, such as smartphones and...
Conference Paper
In this paper the problem of landslide monitoring and deformation analysis using the Kalman filter and results obtained from a GPS mass-market receiver in real-time is addressed. Landslide monitoring and deformation analysis are relevant aspects about the safety of human life in any terrain where landslides can impact human activity. It is therefor...
Conference Paper
Virtual RINEX (VR) is a common product for Global Navigation Satellite System (GNSS) post-processing applications, useful if the distance between the rover and master is greater than 30 km. Many studies have been conducted in order to analyse the content of this kind of data, but few have proved the positioning performances obtainable in particular...
Article
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The aim of this study is to identify the most powerful motion model and filtering technique to represent an urban terrestrial mobile mapping (TMM) survey and ultimately to obtain the best representation of the car trajectory. The authors want to test how far a motion model and a more or less refined filtering technique could bring benefits in the d...
Article
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The aim of this study is to identify the most powerful motion model and filtering technique to represent an urban terrestrial mobile mapping (TMM) survey and ultimately to obtain the best representation of the car trajectory. The authors want to test how far a motion model and a more or less refined filtering technique could bring benefits in the d...
Article
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The main scope of the paper is performing appropriate kriging interpolation of the diabetes prevalence data coming from the Pavia (Italy) Local Health Care Agency (ASL). The original dataset is analyzed, the Bayesian regularization is evaluated, which is applied by other authors and finally prevalence data are simulated by means of random fields, i...
Article
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The purpose of this work is to propose a new redefinition of cadastral boundaries using GNSS equipment and cadastral maps. These maps are the 'original' maps of the Italian Land Cadastre, the first cartographic support built directly from measures carried out by technicians during implantation of the Italian land cadastre. They are called 'original...
Article
Natural hazard events are becoming more frequent, mainly due to human interventions, which take place without careful planning of the territory and without proper risk analysis. In order to accomplish these operations it is necessary to consider mapping tools that allow you to represent the territory: one of the main instruments are the DTM (Di...
Article
Natural hazard events are becoming more frequent, mainly due to human interventions, which take place without careful planning of the territory and without proper risk analysis. In order to accomplish these operations it is necessary to consider mapping tools that allow you to represent the territory: one of the main instruments are the DTM (Digita...
Conference Paper
Full-text available
Various types of technology are used for Terrestrial Mobile Mapping (TMM) such as IMU, cameras, odometers, laser scanner etc., which are integrated in order to determine the attitude and the position of the vehicle in use, especially in the absence of GNSS signal i.e. in an urban canyon. The aim of this study is to use only photogrammetric measure...
Chapter
Full-text available
The differential positioning has got a great development in recent years, thanks to the appearence of GNSS CORSs (Continuous Operating Reference Stations) networks. One of the main goals of these networks is to give the possibility to the users to extend the differential positioning (whether in real time or post-processing) up to 25-50 km, allowing...
Article
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Over the last twenty years, positioning with low cost Global Navigation Satellite System (GNSS) sensors have rapidly developed around the world at both a commercial and academic research level. For many years these instruments have only acquired the GPS constellation but are now able to track the Global’naja Navigacionnaja Sputnikovaja Sistema...
Article
Landslides are one of the major geo-hazards which have constantly affected Italy especially over the last few years. In fact 82% of the Italian territory is affected by this phenomenon which destroys the environment and often causes deaths: therefore it is necessary to monitor these effects in order to detect and prevent these risks. Nowadays, most...
Conference Paper
Full-text available
Nowadays many types of sensors are used for terrestrial mobile mapping (TMM): IMU, odometers, GNSS, cameras, etc., and it is essential to understand how these sensors can improve the solution in terms of precision, accuracy and reliability. TMM issues are characterized by many variables: vehicle trajectory, the height of the buildings and the dista...
Conference Paper
The use of Global Navigation Satellite Systems (GNSS) can help farmers become more efficient, reduce their use of chemicals, and increase crop yields. By increasing the accuracy, availability, reliability and continuity of satellite signals, the use of some augmentations systems (such as WAAS or EGNOS or other private systems) will remove some of t...
Conference Paper
Over the last twenty years, positioning with low cost GNSS sensors has become widespread worldwide at both commercial and academic level. The Geomatics Research Group of DIATI at the Politecnico di Torino has carried out several experiments in order to evaluate the precision achievable when using mass-market GNSS receivers with a network of permane...
Article
Currently, networks for real-time Global Navigation Satellite System positioning (Continuously Operating Reference Stations) are formed by stations with inter-station distances of about 50–60 km. In addition, their products are used for post-processing, particularly where there is no coverage, for the transmission of differential corrections in rea...
Article
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Network Real Time Kinematic (NRTK) positioning is nowadays a very common practice in many parts of the world. The benefits of NRTK positioning and the details of network products have been previously discussed in this column (see the contribution by Leila Kislig in the July/August 2011 issue of Inside GNSS), as has the positioning performance as fu...
Conference Paper
One of the most critical points during the GNSS NRTK (Network Real Time Kinematic) positioning is the correct fixing of the ambiguity phase. This work wants to try to focus attention on the quality control of the real-time GNSS positioning, both from the point of view of what the network provides, and from one of the network products is used by the...
Conference Paper
Today one of the open problems from the geodetic point of view is the determination of a geometric (and not physical) reference system that allow the harmonisation of the altimetric reference systems at continental scale. Trying to solve this problem at European level, one of the goal of the IAG Inter-Commission Project 1.2 is to provide the fundam...
Chapter
Full-text available
The differential positioning has got a great development in recent years, thanks to the appearence of some networks of GNSS permanent stations. One of the main goals of these networks is to extend the differential positioning (whether in real time or post-processing) beyond the limit of 10-15 km, allowing a positioning useful for applications such...
Chapter
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The employment of mass market receivers in a differential mode is not a standard procedure, especially into a network for NRTK positioning. This is because only few mass market receivers are able to yield raw data as output, almost no one accepts differential corrections, and for many applications is sufficient the WAAS augmentation. In actual fact...
Article
GNSS networks of reference stations have a key role for infomobility purposes, such as tracking vehicles with dangerous goods, emergency vehicles aiding, road and trekking paths surveying. The aim of this paper is to analyze the behavior that single frequency instruments (GPS-only, or GPS and GLONASS when it was available), made by the major compan...
Conference Paper
Over last twenty years, positioning with low cost sensors has developed rapidly in the U.S.A. and in Europe at both a commercial and academic research level. In this respect, the Geomatics Research Group of LEGEND at the Politecnico di Torino has also designed and developed a universal system for Mobile Mapping, called LCMMS (Low Cost Mobile Mappin...
Article
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The present paper discusses the advantages of the use of Doppler shift measurements in a Kalman filter estimator in order to improve the kinematic stand-alone global positioning system positioning performance. Tests conducted in an urban environment using a single-frequency receiver demonstrate the real advantages of the proposed real-time computa...
Article
The present work shows the results that have been obtained using a low-cost pedestrian system made up of a GPS receiver and an inertial platform. This positioning system could be used by rescue teams to locate hazard zones and escape routes. Our study shows how multiple sensors can be used in a non-traditional way: the inertial platform is used as...
Conference Paper
MEMS inertial sensors are widely used for navigation applications where size, weight, power and cost are key sides, such as autonomous vehicular control and pedestrian navigation. Otherwise, if there is no doubt that MEMS technologies represents an interesting turning point for low cost inertial-based sensors and applications, nevertheless it is ab...
Article
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Positioning services based on GNSS Permanent Networks (PNs) disseminate the reference frame to users; hence the networks must be adjusted by constraining the ITRF coordinates of some permanent stations (PS), with the satellite orbits and clocks constrained to the values published by the International GNSS Service (IGS). Furthermore, the positioning...
Article
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I ricevitori GNSS di solo codice o in singola frequenza sono strumenti di costo limitato e dunque di potenziale grande diffusione nel mondo delle applicazioni professionali. Se utilizzati in presenza di una rete che fornisce correzioni differenziali in tempo reale possono raggiungere precisioni metriche o submetriche in modalità differenziale e con...
Article
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SOMMARIO Un servizio di posizionamento basato su una rete di SP GNSS contribuisce a disseminare, sia in tempo reale sia per il post-processamento, un sistema di riferimento agli utenti. A tale scopo, in generale si può affermare che la rete dovrebbe essere inquadrata nel sistema di riferimento globale, materializzato dalla rete IGS; nell'operazione...
Article
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SOMMARIO Una rete di stazioni permanenti deve fornire servizi su tre diverse scale temporali: in tempo reale, il giorno successivo ed entro una settimana dall'acquisizione. L'elaborazione di dati in tempo reale prevede un'ottimizzazione tra tempo di latenza e precisione dei risultati; in questo caso il controllo di qualità può essere eseguito esclu...
Article
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Lo sviluppo di reti permanenti di ricevitori GNSS a scopi di servizio prosegue come previsto impetuoso e caotico in Italia. Non si può guardare al GNSS (oggi prevalentemente GPS) e alle sue reti permanenti senza avere chiari quali sono i termini della gestione di tutti i sistemi che lo compongono a livello globale. In tal senso distinguiamo fra: 1....
Article
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Le tecniche di posizionamento RTK di rete sono oggi impiegate nelle campagne di misura GPS in alternativa alle tradizionali tecniche RTK, garantendo risultati più affidabili e di maggior precisione anche a distanze elevate dalle stazioni di riferimento. L'architettura di rete, l'installazione e la gestione sono state studiate da due anni per mezzo...
Article
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The paper describes one of the first outcomes of an Italian national research Project on inertial positioning in photogrammetry. The focus of the paper is on the quality which is attainable from direct photogrammetry in an industrial production context. Even if GPS/IMU -aided photogrammetry is used rather widely, it is still useful to perform rigor...
Article
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Riassunto > La nota descrive i primi risultati di un Progetto di ricerca italiano sul posizionamento inerziale in fotogrammetria. L'articolo riguarda in particolare la qualità ottenibile nelle misure fotogrammetri-che con fotogrammi orientati direttamente e acquisiti in un contesto produttivo. Anche se la fotogrammetria supportata da GPS/IMU è abba...
Article
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Precise RTK positioning is usually performable only on short length bases, to limit distance correlated biases, as atmosphere and ephemerides. However, it is possible to recover some residual biases also over long distance using appropriate area models, improving the performances of long base RTK positioning up to 100 km base length. Permanent refe...
Article
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In cadastral GIS updating, quickness and economization of surveying are important but contrasting requirement. However high precision is usually not required. This paper present some results, obtained processing single and double frequency observations with ALARIS, a self made software based on dynamic Kalman filter, and with the commercial softwar...