Дисертації з теми "Navigation satellite system"
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Štefanisko, Ivan. "Integration of inertial navigation with global navigation satellite system." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221167.
Повний текст джерелаTetewsky, Avram Ross Jeff Soltz Arnold Vaughn Norman Anszperger Jan O'Brien Chris Graham Dave Craig Doug Lozow Jeff. "Making sense of inter-signal corrections : accounting for GPS satellite calibration parameters in legacy and modernized ionosphere correction algorithms /." [Eugene, Ore. : Gibbons Media & Research], 2009. http://www.insidegnss.com/auto/julyaug09-tetewsky-final.pdf.
Повний текст джерела"July/August 2009." Web site title: Making Sense of GPS Inter-Signal Corrections : Satellite Calibration Parameters in Legacy and Modernized Ionosphere Correction Algorithms.
Liu, Langtao. "An intelligent differential GPS navigation system." Thesis, Brunel University, 1997. http://bura.brunel.ac.uk/handle/2438/5219.
Повний текст джерелаBlunt, Paul. "Advanced global navigation satellite system receiver design." Thesis, University of Surrey, 2007. http://epubs.surrey.ac.uk/842714/.
Повний текст джерелаAndrade, Alessandra Arrojado Lisbôa de. "Navigating into the new millennium : the global navigation satellite system regulatory framework." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ64258.pdf.
Повний текст джерелаCheng, Chao-heh. "Calculations for positioning with the Global Navigation Satellite System." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176839268.
Повний текст джерелаPark, Jihye. "IONOSPHERIC MONITORING BY THE GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS)." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339715308.
Повний текст джерелаMacedo, Scavuzzi Dos Santos Juliana. "The liability of global navigation satellite system (GNSS) used for air navigation in Brazil." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119329.
Повний текст джерелаL'utilisation du Système de positionnement par satellites (GNSS) pour la navigation aérienne offre de nombreux avantages à l'aviation puisqu'il est en mesure de réduire les itinéraires, d'économiser de l'essence et de diminuer les émissions de gaz à effet de serre. Il constitue également une aide à la navigation plus flexible et plus précise qui améliore les opérations de vol à des moments critiques tels que l'approche, l'atterrissage, et le décollage. Cependant, le signal GNSS pourrait être défectueux. Dépendamment du moment de la défaillance du signal, celle-là pourrait causer un accident. Ainsi donc, la responsabilité des fournisseurs de services de navigation aérienne est sujette à préoccupation. Puisqu'aucun traité international ne se penche sur la question de la responsabilité du GNSS et des fournisseurs de services de navigation aérienne, des solutions nationales apparaissent comme des réponses pratiques et nécessaires aux revendications de responsabilité. Le Brésil a déjà commencé à utiliser la GNSS en navigation aérienne, et a un Ground Based Augmentation System (GBAS) qui est en train d'être testé à l'aéroport international de Rio de Janeiro. Ainsi donc, il est important d'étudier le régime de responsabilité brésilien pour déterminer si ses règles générales de responsabilité – et plus particulièrement son système de responsabilité gouvernemental – pourraient également s'appliquer à la responsabilité civile des fournisseurs de services de navigation aérienne utilisant le GNSS dans le cas d'un accident causé par une défaillance de signal. Ces revendications sont en grande partie gouvernées par la responsabilité gouvernementale au Brésil et le système légal en place pour y répondre. Cependant, puisqu'il y a beaucoup de controverse entourant la responsabilité du gouvernement sous la doctrine brésilienne, une législation spécifique qui serait en mesure d'équilibrer les différents intérêts en jeu semble être une alternative raisonnable.
Li, Jian. "Investigating the effect of the DGNSS SCAT-I data link on VOR signal reception." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178220159.
Повний текст джерелаBhanot, Sunil. "Implementation and optimization of a Global Navigation Satellite System software radio." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176840392.
Повний текст джерелаAndries, Stephanie. "The Global Navigation Satellite System (GNSS) and the European Galileo program /." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30283.
Повний текст джерелаThe US GPS and Russian GLONASS are the two existing systems. Both of them were created by the military.
Europe is currently developing a civil navigation satellite system: Galileo.
This thesis will present some legal issues of the GNSS discussed in the framework of ICAO: sovereignty of States, universal accessibility, continuity and quality of the service, cost recovery and financing, certification and liability.
It will also present some legal issues due to the creation of the European Galileo program. The financing, organizational framework, certification and liability will be examined. Finally, ICAO's Charter on the Rights and Obligations of States Relating to GNSS Services will be considered.
Kouris, Aristodimos. "An incoherent correlator-based star tracking system for satellite navigation." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271771.
Повний текст джерелаMukka, Nagaraju. "Simulink Based Modeling of a Multi Global Navigation Satellite System." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc955011/.
Повний текст джерелаChen, Luyi. "DUAL FREQUENCY PATCH ANTENNA DESIGN FOR GLOBAL NAVIGATION SATELLITE SYSTEM." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1178633247.
Повний текст джерелаLennen, G. R. "The application of digital techniques to Navstar GPS receiver design." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234682.
Повний текст джерелаAkos, Dennis M. "A software radio approach to Global Navigation Satellite System receiver design." Ohio University / OhioLINK, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1174615606.
Повний текст джерелаWeiss, Jan Peter. "Modeling and characterization of multipath in global navigation satellite system ranging signals." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284495.
Повний текст джерелаTurhan, Birol Erdem. "Optimisation of MF DGNSS, maritime and aeronautical radiobeacon coverage by frequency re-assignment." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298601.
Повний текст джерелаAquino, Marcio Henrique Oliveira de. "Regional approach to wide area DGPS." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287196.
Повний текст джерелаLiu, Fan. "Analysis of integrity monitoring for the local area augmentation system using the global navigation satellite system." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175192969.
Повний текст джерелаTabatabaei, Balaei Asghar Surveying & Spatial Information Systems Faculty of Engineering UNSW. "Detection, characterization and mitigation of interference in receivers for global navigation satellite systems." Publisher:University of New South Wales. Surveying & Spatial Information Systems, 2007. http://handle.unsw.edu.au/1959.4/40545.
Повний текст джерелаAndries, Stephanie. "The Global Navigation Satellite System (GNSS) and the European Galileo programme, legal issues." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ64259.pdf.
Повний текст джерелаBensoussan, Denis. "GNSS and Galileo Liability Aspects." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=93845.
Повний текст джерелаDans les toutes prochaines années, les systèmes globaux de navigation par satellite (GNSS) feront partie intégrante de notre vie quotidienne. En effet, un peu plus de dix ans après la libéralisation de l'accès des civils aux systèmes de navigation par satellite initialement conçus à des fins militaires, les applications civiles permises par la navigation par satellite sont de plus en plus nombreuses et les bénéfices potentiels sont énormes en matière de sécurité et d'efficacité des transports comme pour d'autres secteurs et industries. fr
Belanger, Joseph Franncois Maurice. "Studey into the use of the global navigation satellite system for maritime structure analysis." Thesis, University of Southampton, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500836.
Повний текст джерелаHabrich, Heinz. "Geodetic applications of the global navigation satellite system (GLONASS) and of GLONASS/GPS combinations /." [S.l.] : [s.n.], 1999. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Повний текст джерелаLazarevskiy, Alexander, and Олександр Андрійович Лазаревський. "Navigation dead reckoning system based on a mobile phone." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50760.
Повний текст джерелаThe problem of pedestrian dead reckoning (PDR) is referred to the class of individual navigation problems. The common solution in mobile phones is the use of satellite navigation (GPS, GLONASS, Galileo, etc.). But satellite signal sometimes can be jammed intentionally or lost due to obstacles in urban area. Also, the problem of PDR is interesting in the user localization in indoor environment such as large garages, city molls, etc. Instrumentation of smartphones is now based on Micro-Electro-Mechanical Sensors (MEMS) technology and includes standard set of Inertial Measurement Unit (IMU): accelerometers, gyroscopes, magnetometers and pressure sensor (optionally). Accelerometers can be used to detect step events and further to calculate lengths. But it is sensitive to walking speed, slope of the road, etc., which leads to inaccurate results of calculating the stride length. Also, as any dead reckoning technique PDR suffers from the cumulative error. Since the location estimate is always calculated based on the previous result, the error accumulates rapidly over time. This means that correction updates are necessary on regular basis.
Проблема обліку загибелі пішоходів (ОЗП) відноситься до класу індивідуальних проблем навігації. Загальним рішенням у мобільних телефонах є використання супутникової навігації (GPS, ГЛОНАСС, Galileo тощо). Але супутниковий сигнал іноді може бути заклинений навмисно або втрачений через перешкоди в міській місцевості. Крім того, проблема ОЗП цікава в локалізації користувачів у приміщенні, наприклад, у великих гаражах, міських торгових центрах тощо. Зараз прилади для смартфонів засновані на технології мікро-електромеханічні датчики (MEМД) і включають стандартний набір інерційних вимірювальних приладів (IВП): акселерометри, гіроскопи, магнітометри та датчик тиску (за бажанням). Акселерометри можна використовувати для виявлення крокових подій та подальшого обчислення довжин. Але він чутливий до швидкості ходьби, нахилу дороги тощо, що призводить до неточних результатів розрахунку довжини кроку. Крім того, як і будь-яка техніка розрахунок критичних випадків, ОЗП залежить від сукупної помилки. Оскільки оцінювання місця розташування завжди обчислюється на основі попереднього результату, помилка швидко накопичується з часом. Це означає, що необхідні регулярні оновлення виправлень.
Ritchie, Douglas Allen. "Factors That Affect the Global Positioning System and Global Navigation Satellite System in an Urban and Forested Environment." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etd/2089.
Повний текст джерелаViswanatha, Raghunath. "Design and Simulation of Multi-Frequency Global Navigation Satellite System Receiver Radio Frequency Front-End." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1227298677.
Повний текст джерелаSu, Hua. "Precise orbit determination of global navigation satellite system of second generation (GNSS-2) orbit determination of IGSO, GEO and MEO satellites /." [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962099635.
Повний текст джерелаUnwin, Martin. "The design and implementation of a small satellite navigation unit based on a global positioning system receiver." Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/844372/.
Повний текст джерелаTran, Khoa Anh. "Automatic Identification of Points of Interest in Global Navigation Satellite System Data: A Spatial Temporal Approach." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4595.
Повний текст джерелаMcCall, Daryl Lynn. "Investigation through simulation techniques of the application of differential GPS to civil aviation." Ohio : Ohio University, 1985. http://www.ohiolink.edu/etd/view.cgi?ohiou1184013759.
Повний текст джерелаBraasch, Michael S. "On the characterization of multipath errors in satellite-based precision approach and landing systems." Ohio : Ohio University, 1992. http://www.ohiolink.edu/etd/view.cgi?ohiou1173748635.
Повний текст джерелаCouronneau, Nicolas. "Performance analysis of assisted-GNSS receivers." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/254273.
Повний текст джерелаФролова, І. С. "Коли карта не в силах допомогти, є сигнал GPS". Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/14005.
Повний текст джерелаDainty, Benjamin G. "Use of two-way time transfer measurements to improve geostationary satellite navigation :." Ft. Belvoir Defense Technical Information Center, 2007. http://handle.dtic.mil/100.2/ADA472457.
Повний текст джерелаWellons, William Lee. "A shipboard global positioning system carrier phase interferometric aircraft flight reference system." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1179860957.
Повний текст джерелаHuang, Jidong. "A HIGH-INTEGRITY CARRIER PHASE BATCH PROCESSOR FOR DIFFERENTIAL SATELLITE POSITIONING." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1196143814.
Повний текст джерелаBedada, Tullu Besha. "Absolute geopotential height system for Ethiopia." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4726.
Повний текст джерелаCasadei, Alessandro. "An optical navigation filter simulator for a CubeSat mission to Didymos binary asteroid system." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17998/.
Повний текст джерелаKatragadda, Mahesh. "Design and Simulation of a Planar Crossed-Dipole Global Navigation Satellite System (GNSS) Antenna in the L1 Frequency Band." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1345227397.
Повний текст джерелаHavlík, Martin. "Využití satelitních navigačních systémů v dopravě." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-5049.
Повний текст джерелаSilva, Denis Vinicius Ricardo da. "Determinação de um modelo geoidal local para o Distrito Federal." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/30984.
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O modelo geoidal é parte fundamental na transformação entre as altitudes ortométricas e geométricas. Existem aspectos positivos na sua utilização quando comparados a métodos clássicos de levantamento. O surgimento das técnicas de posicionamento por GNSS (Global Navigation Satellite System) impulsionou de maneira significativa diversas linhas de pesquisa, na busca de um modelo geoidal cada vez mais preciso. A disponibilidade de dados altimétricos, gravimetria terrestre e orbital também contribuíram neste sentido. Deste então, várias abordagens para a obtenção de um modelo geoidal tem sido apresentadas. Atualmente a integração de diferentes métodos se mostra uma alternativa promissora para o cálculo do geoide. Neste contexto, o emprego da técnica Remove-Calcula-Restaura (RCR) tem demonstrado resultados importantes no Brasil e em outras partes do mundo. A base de todas as formulações da técnica RCR envolve métodos gravimétrico e orbital, por isto, utiliza Modelos Digitais de Terreno (MDT), dados gravimétricos terrestres, Modelos do Geopotencial Global (MGG) e valor de densidade para o cálculo de modelos geoidais. Neste trabalho é apresentado um levantamento das diferentes formulações utilizadas no processo de redução gravimétrica. Também uma análise das principais variáveis que possam influenciar no cálculo das anomalias gravimétricas e na elaboração de modelos geoidais, a partir da técnica RCR. Para o cálculo, utilizou-se um pacote denominado GRAVTool, baseado no software MATLAB®. No final da pesquisa, tem-se também, como marco, a determinação de um modelo geoidal local para o Distrito Federal.
The geoidal model is a fundamental part of the transformation between orthometric and geometric heights. There are positive aspects in its use when compared to classical survey methods. The emergence of GNSS (Global Navigation Satellite System) positioning techniques has significantly boosted several lines of research in the search for an increasingly accurate geoidal model. The availability of altimetric data, terrestrial and orbital gravimetry also contributed in this sense. From this, several approaches to obtaining a geoid model have been presented. Currently the integration of different methods shows a promising alternative for the calculation of the geoid. In this context, the use of the Remove-Compute-Restore technique (RCR) has shown important results in Brazil and in other parts of the world. The basis of all RCR technique formulations is derived from gravimetric and orbital methods, using Digital Terrain Models (DTM), terrestrial gravimetric data, Global Geopotential Models (GGM) and density value for the calculation of geoid models. This work presents a revision of the different formulations used in the gravimetric reduction process. Also an analysis of the main variables that can influence the calculation of the gravimetric anomalies and the elaboration of geoid models from the RCR technique. For the calculation, a package called GRAVTool, based on the MATLAB® software, is used. At the end of the research, we also have as a landmark, the determination of a local geoidal model for the Brazilian Federal District.
Bommakanti, Hemanth Ram Kartik. "Impact of Time Synchronization Accuracy in Integrated Navigation Systems." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260239.
Повний текст джерелаGNSS / IMU integrerade navigationssystem kombinerar de positiva egenskaperna hos GNSS och IMU för optimal prestanda i noggranna navigationssystem. Detta görs med hjälp av sensorfusion, till exempel EKF. Tidssynkronisering av IMU-data med exakt GNSS-baserad tid är nödvändigt för att noggrant synkronisera de två systemen. Detta måste göras i realtid för tidskänsliga navigationsapplikationer såsom autonoma fordon. Forskningen görs i två delar. Den första delen är simulering av icke-linjär rörelse i en axel med felaktig tidsstämpling hos ett gyroskop och en accelerometer. Detta görs för att erhålla det högsta tidsfel som är acceptabelt hos ett GNSS / INS-system med hög noggrannhet. Den andra delen är skapandet av en realtidsalgoritm med ett inbyggt STM32-system med FreeRTOS som realtidskärna för en GNSSmottagare och antenn, tillsammans med en IMU-sensor. En jämförande analys av det tidssynkroniserade systemet mot ett osynkroniserat system görs baserat på de positionsfel längs en axel som produceras av gyroskopoch accelerometermätningar. Detta görs genom att utföra statiska och roterande tester med hjälp av en roterande stol.Simuleringen visar att ett noggrant GNSS / INS-system tolererar ett tidsfel på upp till 1 millisekund. Realtidslösningen ger IMU-data med tidsstämplar synkroniserade med GNSS-tid var femte millisekund. Tidsjittret reduceras till ett intervall mellan ± 1 millisekund. Analysen av det slutliga vinkelrotationsfelet och positionsfelet från gyroskopoch accelerometermätningar indikerar att realtidsalgoritmen ger ett lägre fel när systemet är statiskt. Det finns dock inga statistiska bevis för förbättringen från resultaten av rotationstesterna.
Appleget, Andrew L. "A Consolidated Global Navigation Satellite System Multipath Analysis Considering Modern Signals, Antenna Installation, and Boundary Conditions for Ground-Based Applications." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1593112317616893.
Повний текст джерелаКуценко, Олександр Вікторович, та Oleksandr V. Kutsenko. "Методи диференційної навігації повітряних суден за сигналами глобальних навігаційних супутникових систем". Thesis, Національний авіаційний університет, 2021. https://er.nau.edu.ua/handle/NAU/52287.
Повний текст джерелаThe dissertation is devoted to the solution of the actual scientific and technical problem: aircraft differential navigation methods development with the use of global navigation satellite systems signals. That is important for increasing the safety of flights. The aim of the dissertation is the develop and experimentally study new and improved methods of aircraft differential navigation with the use multi-GNSS signals for performing operations: a maneuver in the aerodrome area, landing approach with vertical guidance and categorical. The dissertation analyzes the documents of leading organizations and scientific publications in the aviation and space industries. According to these data, it can be argued that air transport plays a leading role in ensuring the sustainability of economic and social development. A key element that ensures the efficiency and reliability of air transport operations is air navigation support, in particular its radio navigation component. Special attention is paid to the development of satellite landing systems. The ICAO classification of landing approaches is considered, and the analysis of existing categorical systems of instrumental landing is presented. A requirements description for the satellite landing system is provided. The analysis showed that the actual scientific task is aircraft differential navigation methods development with the use of global navigation satellite systems signals, which is important for improving flight safety. In the dissertation, the final approach segment and the local Cartesian coordinate system XYV connected with the runway are considered. The errors arising in the instrumental aircraft landing system with the use of several satellite systems signals are considered. Presented existing and developed models that reduce the impact of these errors. In particular, the developed model of residual tropospheric delay after the differential correction of the pseudorange. A key feature of which is the possibility of application in case of meteorological data absence. Given a model of pseudorange and pseudorate correction witch calculated from data obtained from several ground-based receivers, and transmit to the landing system onboard subsystem.The dissertation presents existing and developed methods for detecting failures in the landing system ground subsystem, determining the contribution of the ground subsystem to the error of the corrected pseudorange, estimating the accuracy and integrity of coordinate determination in a kinematic mode for different combinations of satellite systems. The dissertation describes the developed hardware and software complex that implements created methods and models and allows navigation solution accuracy and integrity hardware in the loop simulation research, for performing operations: a maneuver in the aerodrome area, landing approach with vertical guidance and categorical, using different signals combinations from satellite systems: GPS, GLONASS, GALILEO and BeiDou. Presented flight test results of the developed hardware and software complex. The experimental flight has a linear trajectory that simulates the landing final approach segment and the flight over the runway. According to the test results, the following data were obtained: ground subsystem contribution estimation to the pseudorange error during the experiment; for satellite navigation system during the planned operation: maneuver in the aerodrome area, landing approach with vertical guidance and categorical using different signals combinations from satellite systems: GPS, GLONASS, GALILEO and BeiDou, navigation system error ellipsoids and the percentage false system capacity and false system incapacity were obtained.
Smith, Andrew M. "Global navigation satellite system (GNSS) signal simulator : an analysis of the effects of the local environment and atmosphere on receiver positioning." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512261.
Повний текст джерелаDal, Poz William Rodrigo [UNESP]. "Investigações preliminares sobre a influência do clima espacial no posicionamento relativo com GNSS." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/100251.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O erro devido à ionosfera nas observáveis GNSS (Global Navigation Satellite System) é diretamente proporcional à densidade de elétrons presente na ionosfera e inversamente proporcional a frequência do sinal. Da mesma forma que no posicionamento por ponto, os resultados obtidos no posicionamento relativo são afetados pelo efeito sistemático da ionosfera, que é uma das maiores fontes de erro no posicionamento com GNSS. Mesmo considerando que parte dos erros devido à ionosfera é cancelada na dupla diferenciação, a ionosfera pode causar fortes impactos no posicionamento relativo. O problema principal neste método de posicionamento é a variação espacial na densidade de elétrons, que pode ocorrer em função de vários fatores, tais como hora local, variação sazonal, localização do usuário, ciclo solar e atividade geomagnética. Dependendo das condições do clima espacial, que é controlado pelo Sol, a atividade geomagnética pode ser alterada de forma significativa, dando origem a uma tempestade geomagnética. Nesta pesquisa foram avaliados os efeitos da ionosfera no posicionamento relativo, com observações GNSS da fase da onda portadora (L1), nas regiões ionosféricas de latitude média e alta e na região equatorial. Nas duas primeiras regiões foram analisados os efeitos da ionosfera em períodos de irregularidades, decorrentes de tempestades geomagnéticas. Na região equatorial, que engloba o Brasil, foram analisados os efeitos da ionosfera em função da variação diária e sazonal. No processamento dos dados GNSS foi utilizado o GPSeq, que processa os dados na forma recursiva e fornece os Resíduos Preditos da Dupla Diferença da Fase (RPDDF)...
The error caused by ionosphere on GNSS (Global Navigation Satellite System) is directly proportional to the density of electrons from ionosphere and inversely proportional to the frequency squared of the signal GNSS. As in the case of point positioning, results in relative positioning are affected by systematic effect from ionosphere, which is one of major error sources in the GNSS positioning. Although some errors caused by ionosphere are canceled in double difference, strong impacts may be caused by ionosphere on the relative positioning. In this positioning the main problem is the spatial variation in electron density that can occur due local time, seasonal variation, user location, solar cycle, geomagnetic activity, etc. Depending on the conditions of space weather, in which is controlled by the Sun, the geomagnetic activity can be changed inducing geomagnetic storms. In this research the effects from ionosphere has been evaluated in GNSS relative positioning using L1 carrier phase observations, at the three regions of the ionosphere: middle and high latitudes and equatorial region. In regions of middle and high latitudes have been analyzed the effects from ionosphere in irregularities periods, caused by geomagnetic storms. In the equatorial region, including Brazil, have been analyzed the effects from ionosphere according daily and seasonal variation. In the processing GNSS data has been used GPSeq software. This software processes the data in a recursive form and provides the Predicted Residual of Carrier Phase Double Difference (PRCPDD) ... (Complete abstract click electronic access below)
Antoš, Vladimír. "Využití satelitních navigačních systémů v železniční dopravě." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-71728.
Повний текст джерелаDarmovzal, Pavel. "Využití globálních družicových polohových systémů při mezinárodních přepravách nebezpečných věcí." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359331.
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