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Dissertations / Theses on the topic 'GNSS'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Jedlička, Petr. "Softwarový přijímač GNSS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413152.

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The thesis deals with the analysis and the reception of the freely available signals of the navigation satellites in the L1 and E1 bands of the GPS and Galileo systems. The described signal reception sections include the process of the acquisition, the carrier frequency and phase synchronization and tracking, the spreading code phase tracking, the signal demodulation and the channel decoding. The simulation of the entire receiver is performed in MATLAB. The deeply analyzed signal reception component is the one responsible for the carrier phase and frequency synchronization and tracking. In tha
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2

Marques, Heloísa Alves Silva [UNESP]. "Modelo estocástico para dados GNSS e séries temporais de coordenadas GNSS." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/108612.

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Made available in DSpace on 2014-08-13T14:50:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-12-13Bitstream added on 2014-08-13T18:00:33Z : No. of bitstreams: 1 000758352.pdf: 6791091 bytes, checksum: 54f40e4f8672f601934bd9bbf7eadbfe (MD5)<br>Os modelos funcionais relacionados com as observações GNSS são mais conhecidos do que os modelos estocásticos, visto que o desenvolvimento destes últimos é mais complexo. Normalmente, utilizam-se modelos estocásticos numa forma simplificada, como o modelo padrão, o qual assume que todas as medidas das observações GNSS têm a mesma variância e s
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Marques, Heloísa Alves Silva. "Modelo estocástico para dados GNSS e séries temporais de coordenadas GNSS /." Presidente Prudente, 2013. http://hdl.handle.net/11449/108612.

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Orientador: João Francisco Galera Monico<br>Coorientador: Manoel Ivanildo Silvestre Bezerra<br>Banca: Silvio Rogério Correia de Freitas<br>Banca: Eunice Menezes de Souza<br>Banca: Vilma Mayumi Tachibana<br>Banca: Daniele Barroca Marra Alves<br>Resumo: Os modelos funcionais relacionados com as observações GNSS são mais conhecidos do que os modelos estocásticos, visto que o desenvolvimento destes últimos é mais complexo. Normalmente, utilizam-se modelos estocásticos numa forma simplificada, como o modelo padrão, o qual assume que todas as medidas das observações GNSS têm a mesma variância e são
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Oliveira, Priscylla Angélica da Silva. "Fusão INS/GNSS com auxílio de medidas de baseline e ângulo GNSS." Instituto Tecnológico de Aeronáutica, 2014. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3171.

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Este trabalho investiga sistemas de navegação INS/GNSS auxiliado por medidas de baseline e ângulo GNSS. Os dados gerados para as simulações foram os dados IMU, dados GNSS e informações de baseline e ângulo GNSS. Estas informações, determinadas a partir de um sistema multiantenas para o posicionamento simples e relativo e no método direto, respectivamente, foram utilizadas como medidas auxiliares para a fusão INS/GNSS. Foi estudada a influência dessas medidas auxiliares nas estimativas de atitude do navegador, mais especificamente no ângulo de yaw, pois o acoplamento da dinâmica do sistema com
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Taha, Ahmad Adnan Mohammad. "Mapping the underworld : integrated GNSS based positioning and GIS based GNSS simulation." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/10607/.

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The United Kingdom utility services are facing the challenge of "mapping the underworld" over four million kilometres of buried pipes and cables (a combination of water, sewage, gas, electricity and drainage). Having accurately mapped pipes and cables increases the efficiency of street works projects, but many existing pipes and cables were only mapped relative to other topographic map features and to varying levels of accuracy. The aim of this thesis is to research various means of improving the positional accuracy of underground utilities in built-up areas through the use of Global Navigatio
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6

Beneš, Jiří. "Měření parametrů GNSS přijímačů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413203.

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Goal of this thesis is to propose and realize a viable method to determine static a dynamic parameters of GNSS receivers. Thesis begins with research of GNSS, foremostly determining position and associated uncertainties of measurement. Following chapter contains research of GNSS receivers, data flow and methods of evaluating parameters of such measurements. Summary of obtained information is then used to schedule measurements, assemble experiment and create evaluating metrics. Main selected evaluating metric is weighted histogram of deviations with extended information. Aplication of proposed
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Puchrik, Lukáš. "Aspekty vyhodnocení měření GNSS." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-392288.

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The thesis deals with processing of epoch-wise GNSS measurements from local geodynamic network Sněžník. Its aim is to evaluate the geodynamics in the area of Králický Sněžník Massif and to assess the capabilities of epoch-wise GNSS measurements to detect the geodynamic movements. Within the thesis the comprehensive processing of all the GNSS measurements observed between years 1997 and 2011 is realized using the reprocessed products of first IGS reprocessing Repro1. Bernese GPS software version 5.0 is used for all the processing.
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Elmas, Zeynep Günsu. "Exploiting new GNSS signals to monitor, model and mitigate the ionospheric effects in GNSS." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/28418/.

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Signals broadcast by the Global Navigation Satellite Systems (GNSS) enable global, autonomous, geo-spatial positioning exploited in the areas such as geodesy, surveying, transportation and agriculture. The propagation of these signals is affected as they propagate through the Earth's upper atmosphere, the ionosphere, due to the ionic and electronic structure of the ionosphere. The ionosphere, a highly dynamic and spatially and temporally variable medium, can be the largest error source in Global Navigation Satellite System (Klobuchar 1991) in the absence of the Selective Availability. Propagat
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Younes, Abdelrazak. "Théorie séquentielle appliquée au contrôle de l'intégrité du GNSS et à l'hybridation GNSS/INS." Toulouse, INPT, 2000. http://www.theses.fr/2000INPT044H.

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Un récepteur GPS (Système de Positionnement Global par satellite) permet à son utilisateur de connaître sa position et sa vitesse à tout moment et à tout endroit du globe. Malheureusement, le GPS ne peut satisfaire à lui seul les exigences de l'OACI (Organisation de l'Aviation Civile Internationale) pour devenir un moyen unique de navigation. Il doit être amélioré pour cela. Une des principales limitations du GPS est son intégrité. Celle-ci peut être améliorée grâce à une augmentation du GPS ou par son hybridation avec un autre système de navigation. Au niveau du récepteur GPS, un module RAIM
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10

Porter, Michael Howard. "A Performance Analysis of Two Civilian GNSS Receivers in a GNSS Contested Laboratory Environment." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1564433045685393.

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Wildt, Steffen. "Mehrwegeausbreitung bei GNSS-gestützter Positionsbestimmung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1184854117028-32899.

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GNSS-Messungen werden neben systembedingten Fehlereinflüssen vor allem von den Auswirkungen der Mehrwegeausbreitung und Signalbeugung insbesondere in der Empfangsumgebung dominiert. Verschiedene Dienste z.B. der Landesvermessungsämter haben deshalb ein primäres Interesse daran, die Auswirkungen der Effekte möglichst gering zu halten oder aber genau bestimmen zu können, um Korrekturwerte zu generieren. Mehrwege- und Beugungseffekte lassen sich besonders innerhalb von Netzstrukturen gut bestimmen. Liegen Sollkoordinaten aller Beobachtungsstationen vor gelingt dies auch in Echtzeit. In der vorlie
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Nicolaides, Dimitri P. "GNSS, legal and institutional issues." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ44069.pdf.

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Shokouh, Jalil. "Detecting GNSS Attacks on Smartphones." Thesis, KTH, Kommunikationsnät, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-137109.

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There has been a significant growth in Location-Based Services (LBS) on mobileapplications. These applications provide service to users based on theirgeographical locations. Emergency services, tracking, navigation, advertisingand social networking are examples of them. As the majority of today’s mobilephones are equipped with GPS receivers, GPS positioning has become one ofthe primary methods for obtaining users’ location. Moreover, GPS providesaccurate time service and many applications specially for time synchronizationare relying on GPS. Despite the good accuracy it provides, security is n
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14

Andreas, Svensson, and Robin Nabrink. "GNSS-Styrning : Information för platschefer." Thesis, Karlstads universitet, Avdelningen för energi-, miljö- och byggteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-30711.

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Nicolaïdès, Dimitri P. "GNSS-legal and institutional issues." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20224.

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Should civil aviation reach its promising full potential, it will inevitably be through the use and reliance upon Global Navigation Satellite Systems (GNSS) and its innovative technologies. At present only one option seems clearly and 'directly' operational for the civil aviation challenge, and that is a---USA owned and controlled---GPS based GNSS.<br>This thesis will critically discuss the legal and institutional issues of the GNSS. The issues considered will be based upon the discussions and conclusions recently reached within ICAO. The object of this thesis is to compare, contrast and criti
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Bensoussan, Denis. "GNSS and Galileo Liability Aspects." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=93845.

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In the next coming years global satellite navigation systems (GNSS) will make part of our daily life, as the world is becoming "GNSS-dependant in the same way that it has become Internet-dependant". Indeed, more than ten years folowing the opening up to civilians of satellite-based navigation systems initially designed for military purposes, civil satellite navigation applications are becoming more and more numerous. The potential benefits have proven enormous in terms of transport safety and efficiency as well as for non-transport-related industries.<br>Dans les toutes prochaines années, le
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Bock, Olivier. "GNSS: géodésie, météorologie et climat." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00851617.

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Les systèmes de positionnement et de navigation par satellite (GNSS) ont connu un formidable essor au cours des deux dernières décennies au point d'être aujourd'hui un élément technologique universel. Le recours au positionnement précis par satellite est intégré à notre vie quotidienne: puces GPS intégrées dans les téléphones portables, systèmes de radionavigation utilisés pour le guidage d'engins agricoles, l'approche aérienne et maritime. Les stations GNSS déployées dans les réseaux géodésiques permanents participent au maintien des références géodésiques nationales et internationales et à l
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Wildt, Steffen. "Mehrwegeausbreitung bei GNSS-gestützter Positionsbestimmung." Doctoral thesis, Technische Universität Dresden, 2003. https://tud.qucosa.de/id/qucosa%3A23925.

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GNSS-Messungen werden neben systembedingten Fehlereinflüssen vor allem von den Auswirkungen der Mehrwegeausbreitung und Signalbeugung insbesondere in der Empfangsumgebung dominiert. Verschiedene Dienste z.B. der Landesvermessungsämter haben deshalb ein primäres Interesse daran, die Auswirkungen der Effekte möglichst gering zu halten oder aber genau bestimmen zu können, um Korrekturwerte zu generieren. Mehrwege- und Beugungseffekte lassen sich besonders innerhalb von Netzstrukturen gut bestimmen. Liegen Sollkoordinaten aller Beobachtungsstationen vor gelingt dies auch in Echtzeit. In der vorlie
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Конин, Валерий Викторвич, Valeriy Konin, Алексей Сергеевич Погурельский та ін. "Компоненты GNSS в среде MаtLab". Thesis, Національний авіаційний університет, 2019. https://er.nau.edu.ua/handle/NAU/53562.

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Глобальные навигационные спутниковые системы все чаще используются для решения навигационной задачи в разных сферах экономики: картография, геодезия, управление наземным, воздушным, морським и космическим транспортом. Навигационные спутниковые системы предназначены для определения местоположения движущегося объекта в пространстве и его скорости в определенный момент времени, а также осуществляют координацию времени.<br>Національний авіаційний університет
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Offenbacher, Carolina, and Ellen Thornström. "Ionospheric Models for GNSS Measurements." Thesis, KTH, Fastigheter och byggande, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277711.

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There is an increasing demand for higher precision when using Global Navigation Satellite Systems, GNSS, for positioning. The measurement uncertainty depends on multiple factors and one of them is the ionosphere. Due to the ionosphere being ionized and contains free electrons, satellite signals that propagates the ionosphere will be affected by the total electron content, TEC. There is no way to reduce the errors caused by the ionosphere for single frequency measuring, but it can be done for dual frequencies. The objective for this study was to compare different websites modeling results for d
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Törnqvist, Jonas. "En osäkerhetsundersökning av GNSS-mottagare." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56723.

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Today, GNSS measurements play an important role in the surveying industry, and their use is ever increasing. Many different GNSS receivers and antenna manufacturers are on the market with new ones appearing. The purpose of this study is to investigate the level of measurement uncertainty of three different GNSS receivers: Leica GS15, Sokkia GCX2 and Satlab SL300. The method in this study is based mainly on the method proposed by HMK - Geodatakvalitet 2015 (Manual in measurement and map issues – Geographic data quality 2015 [author’s translation]) by Swedish Lantmäteriet for "Evaluation of meas
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Chmelař, Jakub. "Mobilní robot s GNSS navigací." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376999.

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The diploma thesis is focused on the topic of global satellite navigation of mobile robots. The paper describes the principle of currently available global satellite navigation systems. The main element of the thesis is the proposal of mobile robot navigation algorithm. An integral part is also the design of a mobile robot to verify the functionality of the navigation algorithm. The robot software program is described. At the end, everything is verified by real experiments.
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Strizic, Luka. "Crowdsourcing GNSS Jamming Detection and Localization." Thesis, Luleå tekniska universitet, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66839.

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Global Navigation Satellite Systems (GNSS) have found wide adoption in various applications, be they military, civilian or commercial. The susceptibility of GNSS to radio-frequency interference can, thus, be very disruptive, even for emergency services, therefore threatening people's lives. An early prototype of a system providing relatively cheap widescale GNSS jamming detection, called J911, is explored in this thesis. J911 is smartphone-based crowdsourcing of GNSS observations, most interesting of which are carrier-to-noise-density ratio (<img src="http://www.diva-portal.org/cgi-bin/mimetex
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Nyström, Max. "GNSS Interference Localization Through PDOA-Methods." Thesis, Luleå tekniska universitet, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66950.

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As GPS signals are of low power, the receiving end is always highly susceptible to interference, both unintentional and deliberate. As such there is a need to develop practical ways of detecting and localizing interference sources. This paper evaluates different methods of localization, and also demonstrates a novel method of both practical and cheap localization.
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Anyaegbu, Esther Olulu. "Frequency Domain Processing of GNSS Signals." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486155.

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Niemi, Magnus. "GNSS-mätning: idag och i framtiden." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73344.

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This report shows the difference between today's geodetic measurementsand the one that comes withGalileo and Beidou included. As new GNSSequipment supporting Galileo and Beidou begins to be used, what are the differences and what can be expected by users in the future?This report addresses current theory of sources of error and satellite geometry to highlight the problems associated with GNSS. Based on the sources of error and satellite geometry, the results will be presentedand discussed at the end of the report.
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Wang, Shinan. "Detection and Analysis of GNSS Multipath." Thesis, KTH, Geodesi och satellitpositionering, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188573.

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Multipath effect is generated when a signal arrives at the antenna by multiple paths instead of one direct path. It is, to a large extent, dependent on the surrounding environment of the antenna and the satellite geometry. Despite all the efforts put into the mitigation of multipath errors, it remains the dominant error source that cannot be ignored for GNSS precise positioning and other GNSS applications. In this thesis report, two methods have been developed with Trimble Business Center and MATLAB to study the presence and performance of multipath effect. The first method – Trimble baseline
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Ergun, Firat, and Trevor Schwartz. "NCC GNSS RTK Network Accuracy Analysis." Thesis, KTH, Geodesi och satellitpositionering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199667.

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The purpose of this report is to provide a detailed assessment and investigation into the performance of the Real-Time Kinematic (RTK) network Nordic Construction Company (NCC) established, as part of its aim to better leverage technology within its business, to ensure the high quality and efficiency its clients have come to expect of NCC. Within the course of this investigation, extended RTK and raw data survey sessions were undertaken at each of four baselines significant to NCC (5, 15, 25, and 35 kilometers) from three of NCC’s five RTK base stations. Subsequent analysis resulted in hard do
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Stephenson, Scott. "Automotive applications of high precision GNSS." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/38716/.

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This thesis aims to show that Global Navigation Satellite Systems (GNSS) positioning can play a significant role in the positioning systems of future automotive applications. This is through the adoption of state-of-the-art GNSS positioning technology and techniques, and the exploitation of the rapidly developing vehicle-to-vehicle concept. The merging together of these two developments creates greater performance than can be achieved separately. The original contribution of this thesis comes from this combination: Through the introduction of the Pseudo-VRS concept. Pseudo-VRS uses the princpl
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Collischonn, Carolina. "Estudos de confiabilidade de redes GNSS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/122667.

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O principal objetivo dessa dissertação foi estudar a confiabilidade de redes GNSS. Em termos metodológicos foram analisadas redes obtidas pelos seguintes métodos: redes com inclusão de linhas-base repetidas, por posicionamento relativo e pelo Posicionamento por Ponto Preciso (PPP). A rede GNSS utilizada possui seis estações pertencentes a Rede Brasileira de Monitoramento Continuo (RBMC) do Instituto Brasileiro de Geografia e Estatística (IBGE). As estações se localizam no oeste do estado de São Paulo. Para atingir o objetivo do trabalho foram estruturadas as seguintes hipóteses: a inserção de
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Couronneau, Nicolas. "Performance analysis of assisted-GNSS receivers." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/254273.

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The goal of this thesis is to improve the understanding of the performance of Global Navigation Satellite System (GNSS) receivers that use assistance data provided by cellular networks. A typical example of such a receiver is a mobile phone including a Global Positioning System (GPS) receiver. Using assistance data such as an accurate estimate of the GPS system time is known to improve the availability and the time-tofirst- fix performance of a GNSS receiver. However, the performance depends on the architecture of the cellular network and may vary significantly across networks. This thesis pre
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Kolker, Rachael E. "GNSS Receiver Testing and Algorithm Development." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1495063279434231.

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Chuang, Ying Chieh. "Blind Adaptive Beamforming for GNSS Receivers." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440141128.

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Pizur, Jaroslav. "Klasifikace linek MHD z GNSS dat." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442529.

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The subject of this thesis is digitalization of bus transportation. The input is represented by a sequence of GNSS data which are transformed to the OpenStreetMap format. Doing so, it is enriched by the information OpenStreetMap format provides and it gains its positional advantages as well. Then this thesis deals with ways by which one can detect bus lines from this general sequence of GNSS coordinates. A bus line is recognized as a repeating trajectory, which satisfies criteria derived from its expectable or defined characteristics. A few clustering solutions are proposed and tested for thei
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Raizner, Carina. "A regional analysis of GNSS-Levelling." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-34801.

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Peroutka, Ondřej. "Verifikace digitálního obvodu Microcore GNSS Baseband." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377086.

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The topic of the master´s thesis is to verify Acquisition Engine and Tracking Engine in the Microcore GNSS Baseband digital circuit from Honeywell. Theoretical part contains a brief introduction into the satellite position determination, basic principles of the verified blocks is given and UVM methodology is introduced. Practical part contains requirements, test cases and test procedures. The verification environment is also described. In the last part of the thesis is the verification process and it´s results.
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Stolárová, Ivana. "Testování přesnosti výšek měřených technologií GNSS." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-390175.

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The diploma thesis deals with a testing of the real coordinates accuracy measured in favorable and unfavorable conditions, which are determined by method GNSS RTK. The work explores the real accuracy and reliability of heights measurement with the signal noise and multipath interference occurring, caused by surrounding vegetation, buildings, power lines, and also the accuracy under optimal conditions while measuring in a meadow. Influence of day time, observation length, correction provider to internal and external precision is watched. It also examines the issues of initialization in these co
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Kordasová, Klára. "Testování přesnosti výšek určovaných technologií GNSS." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-390180.

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The aim of this thesis is to test the accuracy of the heights measured by GNSS RTK with service providers CZEPOS and Trimble VRS Now. The thesis deals with precise of height measurement with the influence of surrounded obstacles, such as multipath, fading with the tall buildings, presence of high-voltage lines, limited shadow horizons at the edge of the forest, and measurement under the ideal conditions. The work also deals with the comparison of the period initialization of these monitored conditions. In the locations mentioned a network of test points was built. For measuring GNSS Leica Syst
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Sládek, Miroslav. "Testování výškové přesnosti přijímačů GNSS RTK." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-390182.

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he main subject of this thesis is accuracy testing of three GNSS RTK receivers – Trimble R4, Leica 1200, Topcon GRS-1. It is an outdoor research using different correction types provided by CZEPOS and Trimble.
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40

Stenberg, Niklas. "Spoofing Mitigation Using Multiple GNSS-Receivers." Thesis, Linköpings universitet, Reglerteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158461.

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Global Navigation Satellite Systems (GNSS) are used in a multitude of civilian as well as security related applications. GNSS-receivers are vulnerable to different types of spoofing attacks where the receiver is ``tricked'' to provide false position and time estimates. These attacks could have serious implications; hence, it is important to develop GNSS-receivers that are robust against spoofing attacks. This thesis investigates the use of multiple GNSS-receivers that exchange information such as pseudorange or carrier phase measurements in order to perform spoofing mitigation. It has previous
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41

Sobek, Josef. "GNSS měření posunů v síti Sněžník." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226355.

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This thesis deals with a processing and evaluation of GNSS data measured during the years 2001 - 2012 in geodynamical network Sněžník. The aim of the thesis is a detection of possible horizontal and vertical displacements of points in this network. The thesis also deals with comparison of results determined by only GPS and both GPS and GLONASS measurements. Graphic interpretation of displacements’ evolution during the whole monitored period is one of the results of this thesis.
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42

Bittner, Jan. "Přesnost evropského GNSS pro civilní letectví." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230403.

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This diploma thesis deals with a positioning accuracy of global positioning system GPS and satellite augmentation system EGNOS. My thesis describes the procedure for investigation of the errors in previously mentioned global navigation satellite systems according to L10 regulation and further on an elaboration is worked out in more detail far beyond the requirements of this regulation. In the practical part, an assessment of errors on a real data sample is done, the errors are measured with using a static observation, and later a discussion is carried out on the achieved results.
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43

Homolka, Martin. "Grafická reprezentace navigačních zpráv GNSS prototypu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241959.

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The aim of this thesis is to graphically interpret navigation messages from a prototype of global navigation satellite system. The resulting application is implemented in Python programming language for Windows operating system and follows requests from researchers developing the prototype. Necessary terminology together with graphical user interface programming possibilities of object-oriented language Python is a base for theoretical background of this text. Practical part of this research describes a solution for receiving generated messages from the prototype as well as their storing and f
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44

Calderaro, Luca. "Experimental Quantum Communication with GNSS satellites." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3425763.

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Quantum Communication (QC) is referred as all those protocols that deal with the faithful transportation of quantum states. The huge technological progress in the manipulation of the single quantum particles has led to the experimental tests of some of the most intriguing features of Quantum Mechanics (QM). The gedankenexperiments that were formulated by the fathers of QM in the last century, have become real. In the words of Schrödinger: “... we never experiment with just one electron or atom or (small) molecule.” This is no longer true. We can do experiments involving single atoms or molecul
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45

Escher, Anne-Christine. "Étude de l'apport de l'hybridation GNSS/INS au contrôle de l'intégrité du GNSS pour des applications aviation civile." Toulouse, INPT, 2004. http://www.theses.fr/2004INPT005H.

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Le futur système de navigation par satellites GNSS devra satisfaire les exigences définies par l'OACI en termes de précision, d'intégrité, de disponibilité et de continuité de service. Le GPS ne permet pas de satisfaire pleinement ces exigences de manière autonome. En revanche son hybridation avec les systèmes de navigation inertielle tels que l'IRS est une solution candidate. Les mesures GPS sont utilisées comme observation pour l'estimation des erreurs inertielles, les données IRS corrigées forment la solution de navigation utilisée pour le positionnement. Lors de l'indisponibilité du signal
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46

Boer, Jean-Rémi de. "Capteurs MEMS : optimisation des méthodes de traitement capteurs, de navigation et d'hybridation." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0001/document.

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Les travaux menés durant cette thèse ont pour objectif d’améliorer les performances des systèmes hybrides GNSS/MEMS. Ils se décomposent en deux parties distinctes : d’une part, le développement d’un ensemble de traitement capteurs cherchant à améliorer la mesure elle-même et d’autre part, l’optimisation des algorithmes d’hybridation pour les capteurs MEMS de Thales. Le traitement capteur consiste en l’estimation de l’accélération vraie (resp. la vitesse angulaire vraie) à partir de la sortie du capteur accélérométrique (resp. gyrométrique). Ce traitement a été réalisé en deux sous-étapes : 1)
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47

Corelli, Loris. "Posizionamento GNSS di fotogrammi acquisiti da UAV." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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L’oggetto di studio di questa tesi consiste nel primo approccio di sperimentazione dell’utilizzo di tecnologia UAV (Unmanned aerial vehicle, cioè velivoli senza pilota), per fotogrammetria ai fini di una valutazione di eventuali danni ad edifici, a seguito di un evento straordinario o disastri naturali. Uno degli aspetti più onerosi in termini di tempo e costi di esecuzione, nel processamento di voli fotogrammetrici per usi cartografici è dovuto alla necessità di un appoggio topografico a terra. Nella presente tesi è stata valutata la possibilità di effettuare un posizionamento di precisione
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48

Egido, Egido Alejandro. "GNSS reflectometry for land remote sensing applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/129090.

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Soil moisture and vegetation biomass are two essential parameters from a scienti c and economical point of view. On one hand, they are key for the understanding of the hydrological and carbon cycle. On the other hand, soil moisture is essential for agricultural applications and water management, and vegetation biomass is crucial for regional development programs. Several remote sensing techniques have been used to measure these two parameters. However, retrieving soil moisture and vegetation biomass with the required accuracy, and the appropriate spatial and temporal resolutions still remains
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Arribas, Lázaro Javier. "GNSS array-based acquisition: theory and implementation." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/125031.

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This Dissertation addresses the signal acquisition problem using antenna arrays in the general framework of Global Navigation Satellite Systems (GNSS) receivers. The term GNSS classi es those navigation systems based on a constellation of satellites, which emit ranging signals useful for positioning. Although the American GPS is already available, which coexists with the renewed Russian Glonass, the forthcoming European contribution (Galileo) along with the Chinese Compass will be operative soon. Therefore, a variety of satellite constellations and signals will be available in the next years.
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García, Molina José Antonio. "GNSS Signal processing and spatial diversity exploitation." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/668852.

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Global Navigation Satellite Systems (GNSS) signals are broadly used for positioning, navigation and timing (PNT) in many different applications and use cases, Athough different PNT technologies are available, GNSS is expected to be a key player in the derivation of positioning and timing for many future applications, including those in the context of the Internet of Things (IOT) or autonomous vehicles, since it has the imponant advantage of being open access and worldwide available. Indeed, GNSS is performing very well in mild propagation conditions, achieving position and time synchronization
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