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Wyświetlanie 1-35 z 35
Tytuł:
Global satellite navigation systems at high latitudes, visibility and geometry
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/320934.pdf
Data publikacji:
2016
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
satellite navigation system
visibility of satellites
geometry of the system
Opis:
Since few years the significance of the navigation at high latitudes (60° and more), increases incessantly, e.g. northern passages between Atlantic and Pacific Waters. In these regions the user’s position can be obtained mainly from global satellite navigation systems (SNS). Nowadays (September 2016) two systems, American GPS and Russian GLONASS, are fully operational, two next, Galileo in Europe and BeiDou in China, are under construction. As the error of user’s position obtained from these systems depends on geometry factor DOP (Dilution Of Precision) among other things the knowledge of the number of satellites visible by this user above given masking elevation angle Hmin and the distributions of DOP coefficient values, GDOP in particular, is very important. The lowest and the greatest number of satellites visible in open area by the user at high latitudes for different Hmin, the percentage of satellites visible above angle H, distributions of satellites azimuths and GDOP coefficient values for different Hmin for all these four SNSs at different user’s latitudes (beginning from 60°) and other distributions are presented in the paper. All calculations were made for constellation of BeiDou 27 MEO satellites, Galileo 24 satellites, GLONASS 24 and GPS 31 satellites.
Od kilku lat znaczenie nawigacji na dużych szerokościach geograficznych (60° i wyższych) wzrasta nieprzerwanie, np. przejście północne łączące Atlantyk i Ocean Spokojny. W tych rejonach współrzędne użytkownika mogą zostać określone głównie za pomocą globalnych nawigacyjnych systemów satelitarnych (NSS). Obecnie (sierpień 2016) w pełni operacyjne są dwa systemy — amerykański GPS i rosyjski GLONASS, dwa kolejne są w budowie — Galileo w Europie i BeiDou w Chinach. Z uwagi na to, że błąd pozycji użytkownika określonej za pomocą tych systemów zależy również od współczynnika geometrycznego DOP, bardzo istotna jest znajomość liczby satelitów widocznych przez użytkownika powyżej przyjętej wysokości Hmin oraz rozkładu współczynnika DOP, w szczególności GDOP. W artykule omówiono najmniejszą i największą liczbę satelitów widocznych powyżej danej Hmin, procent satelitów widocznych powyżej danej H, procentowy rozkład azymutów satelitów oraz współczynnika GDOP na różnych szerokościach dla wszystkich czterech globalnych NSS. Obliczenia zostały zrealizowane przy założeniu, że system BeiDou liczy 27 satelitów, system Galileo 24 satelity, GLONASS 24 satelity, GPS zaś 31 satelitów.
Źródło:
Annual of Navigation; 2016, 23; 89-102
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BeiDou and Galileo, Two Global Satellite Navigation Systems in Final Phase of the Construction, Visibility and Geometry
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/117164.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
BeiDou
Galileo
GNSS construction
GNSS geometry
GNSS visibility
Global Positioning System (GPS)
Dilution of Precision (DOP)
Opis:
Spatial segment is one of three segments of each satellite navigation systems (SNS). Nowadays two SNSs, GPS and GLONASS, are fully operational, two next SNSs, BeiDou in China and Galileo in Europe, are in final phase of the construction. In the case of China system this segment will consist of 35 satellites with three types of orbits ? medium (MEO), geostationary (GEO) and inclined geosynchronous (IGSO). As GEO and IGSO satellites can be used in China and Asia-Pacific region only, BeiDou MEO constellation with 27 fully operational satellites will be taken into account in this paper. The orbital planes of the Galileo constellation will be divided in “slots” that contains at least one operational satellite. The Galileo reference constellation has 24 nominal orbital positions or operational slots in MEO homogeneously distributed in 3 orbital planes; i.e. 8 slots equally spaced per plane. As the error of user’s position obtained from both systems depends on geometry factor DOP (Dilution Of Precision) among other things the knowledge of the number of satellites visible by the user above given masking elevation angle Hmin and the distributions of DOP coefficient values, GDOP in particular, is very important. The lowest and the greatest number of satellites visible in open area by the observer at different latitudes for different Hmin, the percentage of satellites visible above angle H, distributions (in per cent) of satellites azimuths and GDOP coefficient values for different Hmin for BeiDou and Galileo systems at different latitudes are presented in the paper.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 381-387
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of global navigation satellite systems in maritime navigation
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/135402.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
GPS system
GNSS receiver
shipborne GPS and GNSS receiver
type of GPS and GNSS receivers
maritime navigation
Opis:
Currently (April 2016) uninterrupted information about a ship’s position can be obtained from specialized electronic position-fixing systems, in particular, Satellite Navigation Systems (SNSs) such as GPS and GLONASS and Satellite Based Augmentation Systems (SBASs) such as EGNOS or WAAS. The generic name given to all the above mentioned systems is Global Navigation Satellite Systems (GNSS). Many models, designed for the ship’s bridge and provided by about a dozen manufacturers, are available on the world market. In Europe, one of the most comprehensive sources of knowledge on the global GNSS market is a report published, on average, every 15 months by the European GNSS Agency GSA. Another receiver survey is published each year in the January number of the magazine “GPS World”. The detailed analysis of market report and receiver survey, possible use of EGNOS and Galileo in the maritime market, and different maritime applications of GNSS equipment are described in this paper.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 74-79
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global Navigation Satellite Systems Applications in Different Modes of Transport
Wykorzystanie globalnych nawigacyjnych systemów satelitarnych w różnych gałęziach transportu
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/134596.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
global satellite navigation systems
GNSS
mode of transport
GNSS market and applications
globalne nawigacyjne systemy satelitarne
gałęzie transportu
rynek i zastosowania GNSS
Opis:
Nowadays (July 2016) we can distinguish four modes of transport – air, maritime, rail and road. In each mode the continuous knowledge of the current user’s position is one of the most important parameters of safety and economy of the transport. The information about position can be obtained from satellite navigation systems SNS (GPS, GLONASS) and based augmentation systems SBAS (WAAS, EGNOS, MSAS, GAGAN). Two next global SNSs and one SBAS are under construction. This paper gives the reply to some questions: in which mode these systems are the most frequently used and why, which system is preferred in separate mode and individual region of the world, which kind of the receiver, one or more systems, are most popular. The comparison of SNSs applications, the capability of SNS receivers and supported constellations by theses receivers and additionally the detailed analysis of SNS receiver survey designed for each mode of transport are presented in this paper also.
Obecnie (lipiec 2016) można wyróżnić cztery gałęzie transportu – drogowy, kolejowy, morski i lotniczy. W każdej z nich nieprzerwana znajomość bieżącej pozycji użytkownika jest jednym z najważniejszych czynników decydujących o bezpieczeństwie i ekonomii transportu. Informację o pozycji mogą zapewnić satelitarne systemy nawigacyjne SSN (GPS, GLONASS) i systemy wspomagające SBAS (WAAS, EGNOS, MSAS, GAGAN). Dwa kolejne globalne SSN i jeden SBAS są w trakcie budowy. W artykule udzielono odpowiedzi na kilka pytań: w jakiej gałęzi transportu w/w systemy są najczęściej stosowane i dlaczego oraz który system jest preferowany w poszczególnych gałęziach i rejonach świata. Dla każdej z czterech gałęzi porównano także zastosowania GNSS, możliwości odbiorników GNSS i wykorzystywanie przez nich satelitów różnych systemów, a dodatkowo przedstawiono wyniki analizy porównawczej odbiorników GNSS przeznaczonych dla poszczególnych gałęzi transportu.
Źródło:
Problemy Transportu i Logistyki; 2016, 34, 2; 117-125
1644-275X
2353-3005
Pojawia się w:
Problemy Transportu i Logistyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global Navigation Satellite Systems – Perspectives on Development and Threats to System Operation
Autorzy:
Czaplewski, K.
Goward, D.
Powiązania:
https://bibliotekanauki.pl/articles/117128.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Global Positioning System (GPS)
satellite navigation
satellite navigation and timing technology
e-Loran
GLONASS
BeiDo
EGNOS
Opis:
The rapid development of satellite navigation and timing technologies and the broad availability of user equipment and applications has dramatically changed the world over the last 20 years. It took 38 years from the launch of the world’s first artificial satellite, Sputnik 1, (October 4, 1957) to the day NAVSTAR GPS became fully operational (July 17, 1995). In the next 20 years user equipment became widely available at the consumer level, and 10 global and regional satellite systems were partially or fully deployed. These highly precise signals provided free to the user have been incorporated by clever engineers into virtually every technology. At the same time interference with these signals (spoofing and jamming) have become a significant day to day problem in many societies and pose a significant threat to critical infrastructure. This paper provides information on the current status and development of navigation satellite systems based on data provided by the systems' administrators. It also provides information on Loran/eLoran, a system which many nations have selected as a complement and backup for satellite navigation systems.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 183-192
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usage of the global navigation satellite systems in safety and protection issues
Autorzy:
Maciuk, Kamil
Rudyk, Yuriy
Powiązania:
https://bibliotekanauki.pl/articles/2091151.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
GNSS
GPS
protection
safety
satellite systems
ochrona
bezpieczeństwo
systemy satelitarne
Opis:
Currently, global navigation satellite systems (GNSS) play a key role in the broad field of security and human life. In principle, almost every area of human activity (for example, mining, energy or construction) systems related to saving human life are introduced. Generally, satellite navigation is an indispensable element of this type of systems. In this paper, authors present basic principles of the GNSS operation and the current state of knowledge about usage of the global navigation satellite systems in the area of safety, protection and rescue issues.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2020, 109; 93--102
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usage of the global navigation satellite systems in safety and protection issues
Autorzy:
Maciuk, Kamil
Rudyk, Yuriy
Powiązania:
https://bibliotekanauki.pl/articles/2091212.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
GNSS
GPS
protection
safety
satellite system
ochrona
bezpieczeństwo
systemy satelitarne
Opis:
Currently, global navigation satellite systems (GNSS) play a key role in the broad field of security and human life. In principle, almost every area of human activity (for example, mining, energy or construction) systems related to saving human life are introduced. Generally, satellite navigation is an indispensable element of this type of systems. In this paper, authors present basic principles of the GNSS operation and the current state of knowledge about usage of the global navigation satellite systems in the area of safety, protection and rescue issues.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2020, 109; 93--102
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Określanie lokalizacji pociągu za pomocą systemów radionawigacyjnych
Localisation of a train using GNSS systems
Autorzy:
Iwański, R.
Toruń, A.
Powiązania:
https://bibliotekanauki.pl/articles/253939.pdf
Data publikacji:
2006
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
Global navigation Satellite Systems
GNSS
pociąg
radionawigacja
transport kolejowy
Opis:
Rozwój usług systemów nawigacji satelitarnej - GNSS (Global Navigation Satellite Systems), zwłaszcza przyszłościowego europejskiego systemu galileo może znacznie przyczynić się do poprawy konkurencyjności i wydajności na wielu liniach kolejowych, zmniejszając koszty utrzymania oraz zachowujęa wymagany poziom bezpieczeństwa. W materiale przedstawiono nowe, obecnie stosowane przez firme Bombardier, koncepcje lokalizacji pociągu w oparciu o GNSS. jako przykład projektu wykorzystującego GNSS do pozycjonowania pociągu został przytoczony projekt INTEGRAIL.
Źródło:
TTS Technika Transportu Szynowego; 2006, 9; 37-42
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of positioning methods using Global Navigation Satellite Systems (GNSS) in Polish State Railways (PKP)
Autorzy:
Specht, Mariusz
Szmagliński, Jacek
Specht, Cezary
Koc, Władysław
Wilk, Andrzej
Czaplewski, Krzysztof
Karwowski, Krzysztof
Dąbrowski, Paweł S.
Chrostowski, Piotr
Grulkowski, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/906101.pdf
Data publikacji:
2020
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
rail transport
global navigation satellite system (GNSS)
satellite receiver
European Train Control System (ETCS)
train positioning system
Polish State Railways (PKP)
Opis:
Each year, global navigation satellite systems (GNSS) improve their accuracy, availability, continuity, integrity, and reliability. Due to these continual improvements, the systems are increasingly used in various modes of transport, including rail transport, the subject of this publication. GNSS are used for rail passenger information, rail traffic management, and rail traffic control. These applications differ in the positioning requirements that satellite navigation systems must meet. This article presents the methods and systems of rolling stock location and tracking using the Polish State Railways (PKP) as an example. The information on the equipment used for train positioning is not specified anywhere, hence they may differ, even for the same multiple units travelling in different parts of the country. In addition, the publication presents the progress of the European Train Control System (ETCS) implementation by the PKP.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 62 (134); 26-35
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odbiorniki GNSS w praktyce inżynierskiej
GNSS receivers in engineering practice Introduction to Global Navigation Satellite Systems
Autorzy:
Perski, A.
Wieczyński, A.
Bożek, K.
Kapelko, S.
Pawłowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/276249.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
GPS
GLONASS
Galileo
EGNOS
nawigacja
błędy pomiarowe
measuring errors
low-cost GNSS receivers
Opis:
W pierwszym z serii artykułów przedstawiono zarys zasady działania oraz wybrane pojęcia związane z tematyką Globalnych Systemów Nawigacji Satelitarnej (ang. Global Navigation Satellite System - GNSS) a następnie krótkie zestawienie podstawowych parametrów w kontekście tanich odbiorników przeznaczonych do integracji we własnych aplikacjach. Przedstawiono przegląd istotnych parametrów i funkcjonalności dostępnych na rynku odbiorników ze wskazaniem potencjalnych "pułapek", jakie mogą czyhać na projektanta. Autorzy w kolejnych artykułach dokonają przeglądu dostępnych na rynku odbiorników typu "OEM low-cost" oraz przedstawią wyniki przeprowadzonych badań stacjonarnych oraz mobilnych dla różnych aplikacji.
In this article, the first of a series, we have outlined the principles of operation and selected concepts related to the theme of Global Navigation Satellite Systems (GNSS) and a brief compendium of the basic parameters of low-cost GNSS receivers available for integration into typical applications. The article begins with an easy-to-read and non-technical description of the most basic principles of operation and limitations of GNSS systems so that the reader can familiarise themselves with these concepts. This is followed by a brief overview of the relevant parameters and functionality of GNSS receivers currently available on the market along with some of the potential 'pitfalls' which might be waiting for application designers. The authors in subsequent articles in this series will review 'low-cost OEM' receivers currently available on the market and will present the results of both stationary and mobile testing for different applications.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 3; 103-111
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of a novel Receiver Autonomous Integrity Monitoring procedure consistent with IMO requirements
Autorzy:
Mink, M.
Heck, B.
Powiązania:
https://bibliotekanauki.pl/articles/134914.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Global Navigation Satellite Systems
integrity
Receiver Autonomous Integrity Monitoring
maritime
International Maritime Organization
protection level
Opis:
Although integrity concepts for Global Navigation Satellite Systems (GNSS) are ubiquitous in the aviation community, integrity algorithms of comparable maturity have not yet been developed for maritime users. The International Maritime Organization (IMO) specifies requirements different from those specified by the International Civil Aviation Organization (ICAO). These different requirements affect the design of the integrity algorithms with respect to integrity risk allocation and threat space. This paper describes a novel integrity algorithm based on conditions valid for maritime users. The performance of the novel integrity algorithm has been assessed and compared to a conventional Receiver Autonomous Integrity Monitoring (RAIM) approach consistent with IMO requirements.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 155-161
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Positioning Functionality in ASG EUPOS for Hydrography and Off-Shore Navigation
Autorzy:
Rogowski, J.
Specht, C.
Weintrit, A.
Leszczyński, W.
Powiązania:
https://bibliotekanauki.pl/articles/116967.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite Systems (GNSS)
geodesy
ASG-EUPOS
Gulf of Gdansk
hydrography
offshore navigation
Positioning Functionality
Opis:
The paper discusses the ASG EUPOS services. There is presented an assessment of the possibility of using this system selected sites in hydrography and off-shore navigation tasks. Presented and analyzed the experiments were carried out in the port of Gdynia and on the Gulf of Gda?sk. The results obtaining in the work confirm the possibility of the position accuracy guaranteed by ASG EUPOS services. The obtained accuracy greatly exceeds the needs and requirements of coastal navigation and underwater mining and exploration of sea bottom.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 221-227
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Attempt to Use Google Earth Pro Images for Selected Geodetic Works − for Example of Wolności Square in Poznań (Poland)
Autorzy:
Kubiak, Jarosław
Magda, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/43347428.pdf
Data publikacji:
2020-12-15
Wydawca:
Poznańskie Towarzystwo Przyjaciół Nauk
Tematy:
Global Navigation Satellite Systems
Google Earth Pro maps
Topographic Objects Database
topographic descriptions
satellite measurement
Opis:
The article concerns issues pertaining to satellite geodesy and the possibilities of using the available source materials such as high-resolution satellite maps for selected works which require a high degree of accuracy in determining the location of topographic objects. The purpose of the work was to indicate the potential use of Google Earth maps for selected geodetic works (preparing topographic descriptions, sketch maps) in order to facilitate and accelerate the process. Works were carried out in an urban area, Wolności Square in Poznań (Poland) where 58 checkpoints were located. In order to design them, maps from the Google system from four periods were used. The research used the Global Navigation Satellite Systems set consisting of a Leica GS08 + satellite receiver and a Leica CS15 controller, geodetic software for work design (Trimble GNSS Planning Online) and calculations (C-Geo 8) as well as cartographic materials and data obtained from the Municipal Center of Geodetic and Cartographic Documentation in Poznań: the master map, catalog data and topographic descriptions of the reference points. The results show that the accuracy of the location of points offered by Google is greater than declared by the system operators. However, it is not sufficient for applications in the assumed geodetic works.
Źródło:
Badania Fizjograficzne Seria A - Geografia Fizyczna; 2020, 11 (71); 65-74
2081-6014
Pojawia się w:
Badania Fizjograficzne Seria A - Geografia Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
R-Mode receiver development for medium frequency signals
Autorzy:
Grundhöfer, L.
Gewies, S.
Powiązania:
https://bibliotekanauki.pl/articles/134934.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Global Navigation Satellite Systems
GNSS
GPS
R-mode technology
R-mode receiver
LORAN-C
maritime radio beacons
Opis:
Signals from Global Navigation Satellite Systems are the primary source for Position, Navigation and Time (PNT) information onboard any vessel today. As these signals are prone to interference, a maritime backup system is needed to provide reliable PNT data, R(anging)-Mode is such a system. It utilizes existing maritime radio beacons or base stations of the Automatic Identification System (AIS) by adding ranging components to the legacy signals. The first modified radio beacons transmit medium frequency (MF) R-Mode signals in northern Germany. This paper has described the current state of the authors’ research and development activities at the receiver level for MF R-Mode signals. The receiver platform has been introduced, which was based on off-theshelf components and the implemented algorithms for distance estimation have been explained. Furthermore, the results of the first ranging measurements have been presented, which have shown the general suitability of the R-Mode technology as a source for maritime positioning and timing data.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 56 (128); 57-62
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of Slant Tropospheric Delays from GNSS Observations with Using Precise Point Positioning Method
Autorzy:
Savchuk, S.
Khoptar, A.
Powiązania:
https://bibliotekanauki.pl/articles/320603.pdf
Data publikacji:
2018
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
Global Navigation Satellite Systems (GNSS)
atmosphere monitoring
precise point positioning method (PPP)
zenith tropospheric delay
slant tropospheric delay
Opis:
Global Navigation Satellite Systems give opportunities for atmospheric parameters analysis in behalf of solving many atmosphere monitoring tasks. The authors of this article demonstrated possibility of slant tropospheric delays determination with using precise point positioning method – PPP. The atmospheric parameters, retrieved from GNSS observations, including zenith tropospheric delays, horizontal gradients, and slant tropospheric delays, are analyzed and evaluated. It was obtained slant tropospheric delays, along the satellite path, for each satellite, at a certain elevation angle and azimuth, at each time, instead of obtaining a single zenith tropospheric delay composed of all visible satellites at one time. The results obtained proved that suggested method was correct.
Globalne systemy nawigacji satelitarnej ‒ GNSS ‒ dają możliwości analizy parametrów atmosferycznych do rozwiązywania wielu zadań związanych z monitorowaniem atmosfery. Autorzy tego artykułu zademonstrowali możliwość estymacji opóźnienia troposferycznego w kierunku do satelity za pomocą metody absolutnego precyzyjnego pozycjonowania ‒ PPP. Parametry atmosferyczne, uzyskane z obserwacji GNSS, w tym opóźnienie troposferyczne w kierunku zenitu, gradienty poziomy i opóźnienie troposferyczne w kierunku do satelity są analizowane i oceniane. Otrzymaliśmy opóźnienia troposferyczne w kierunku do satelity dla każdego satelity pod pewnymi kątami wzniesienia i azymutu w każdej chwili, zamiast uzyskać pojedyncze opóźnienie troposferyczne w kierunku zenitu złożone z wszystkich widzialnych satelitów naraz. Uzyskane wyniki wykazały, że sugerowana metoda była prawidłowa.
Źródło:
Annual of Navigation; 2018, 25; 253-266
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of SBAS/EGNOS enabled devices in maritime
Autorzy:
López, M.
Antón, V.
Powiązania:
https://bibliotekanauki.pl/articles/2063971.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
EGNOS
navigation and timing
Global Navigation Satellite Systems
satellite-based augmentation systems
dynamic positioning
Portable Pilot Unit
Automatic Identification System
advanced maritime technologies
Opis:
The maritime sector was one of the first communities that recognized and exploited the opportunities and advantages provided by Global Navigation Satellite Systems (GNSS). In fact, GNSS have become the primary means of obtaining Position, Navigation and Timing (PNT) information at sea. Most of the ships in the world are equipped with GNSS receivers. GPS provides the fastest and most accurate method for mariners to navigate, measure speed, and determine location. However, its performance can be enhanced by taking advantage of augmentation systems such as differential GNSS or Satellite-Based Augmentation Systems (SBAS/EGNOS), especially in terms of accuracy. Direct access to EGNOS in vessels can be achieved through EGNOS-enabled navigation receivers and EGNOS-enabled AIS transponders. This paper provides an analysis of the number of onboard devices, mainly devoted to navigation purposes, and AIS transponders which are SBAS compatible. In addition, other equipment using GNSS positioning in the maritime and inland waterways domains are also considered for the analysis of SBAS compatibility, including inland AIS, Portable Pilot Units (PPUs) and Dynamic Positioning (DP) equipment. A first survey was done in 2017 to have an overview of the percentage of SBAS enabled devices available in the maritime market [8]. Since then, the analysis has been yearly updated to understand the market evolution in terms of SBAS compatibility and its main results are summarised in this paper.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 543--549
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inventory taking of the upper water reservoir in pumped-storage power station in Żydowo using classical land survey methods and integrated hydroacoustic and global navigation satellite systems (GNSS)
Autorzy:
Popielarczyk, D.
Templin, T.
Powiązania:
https://bibliotekanauki.pl/articles/225382.pdf
Data publikacji:
2009
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
hydrografia
elektrownia
Jezioro Kamienne
Jezioro Kwiecko
hydrography
power station
Lake Kamienne
Lake Kwiecko
Opis:
The article presents the results of land survey and hydrographical works completed on Lake Kamienne - the upper water reservoir of the Pumped-Storage Power Station in Żydowo. The power plant with the capacity of 150 MW built in 1960 uses the difference in water level between Lake Kamienne and Lake Kwiecko of ca. 80 m. The detailed inventory of a part of the coastline was taken using the classical land survey techniques (Total Station), while for the remaining part it was taken using the GPS/EGNOS Thales Mobile Mapper satellite navigation receiver. The bathymetric measurements of the lake were carried out on the bases of GPS/RTK satellite positioning using the Ashtech X-Treme receiver while hydroacoustic sounding was conducted using the Simrad EA501P hydroacoustic system. The article describes the individual stages of the work and methods for raw land survey and hydrographical data processing. Development of the digital bathymetric chart, digital elevation model of the battom and the visualization of Lake Kamienne were the final effects of the work.
Źródło:
Reports on Geodesy; 2009, z. 2/87; 325-335
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Teaching Celestial Navigation in the Age of GNSS
Autorzy:
Ibáñez, I.
Powiązania:
https://bibliotekanauki.pl/articles/117421.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
celestial navigation
age of GNSS
astronavigation
teaching celestial navigation
Maritime Education and Training (MET)
MET System in Spain
STCW
Global Navigation Satellite Systems (GNSS)
Opis:
Over the past two decades, we have witnessed the astounding development of Global Navigation Satellite Systems (GNSS). Celestial navigation has gradually been declining, displaced by the availability of these new, accurate, and easy-to-use electronic systems. Nonetheless, according to the International Convention on Standards of Training, Certification and Watchkeeping (STCW), deck officers onboard merchant ships must have been trained in the observance of celestial bodies to plot the ship’s position and to calibrate compass error. It is a real challenge in the current context to which lecturers in nautical astronomy can respond through innovation in their teaching methods. A new approach to training students in celestial navigation at the Nautical College of the University of the Basque Country is discussed in this paper. It has already achieved promising results in comparison with the traditional teaching methodology, and is both efficient and effective. The adoption of institutional measures is also proposed to ensure that the competence acquired in the training phase is at all times present throughout professional practice.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 573-584
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global Positioning System: Political Support, Directions of Development, and Expectations
Autorzy:
Czaplewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/116087.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite Systems (GNSS)
Selective Availability
Global Positioning System GPS
Political Support
Positioning
Navigation and Timing (PNT)
GPS management
GPS modernization
PNT Advisory Board
Opis:
Over the last decade the Global Positioning System has become a global, multifunctional tool which provides services that are an integral part of U.S. national security as well as the security of other highly developed countries. Economic development, transport security as well as homeland security are important elements of the global economic infrastructure. In 2000 the United States acknowledged the growing significance of GPS for civilian users and stopped intentionally degrading accuracy for non-military signals that are known as “Selective Availability”. Since then, commercial applications of satellite systems have been proliferating even more rapidly, and therefore, their importance in everyday life has greatly increased. Currently, services that depend on information obtained from the Global Positioning System are the driving force behind economic growth, economic development and the improvement in life safety. This economic development would not be possible without the financial and political support of the US government to maintain the operation of the GPS system. Therefore it is important to have knowledge about the intentions of the US government how system GPS will be developed in the future. Decisions taken in the last 3 months are the subject of this article.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 229-232
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation Analysis of the Network Structure Measured by Global Navigation Satellite Systems with a Selection of Cofactors
Analiza zniekształceń struktury sieci mierzona za pomocą nawigacji satelitarnej z wyborem kofaktorów
Autorzy:
Weiss, G.
Labant, S.
Weiss, E.
Powiązania:
https://bibliotekanauki.pl/articles/317812.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
3D local geodetic net
GNSS surveying
LMS
deformation analysis
errors ellipsoid
MINQUE
lokalna geodezyjna sieć 3D
miernictwo GNSS
analiza zniekształceń
elipsoida błędów
Opis:
Global Navigation Satellite Systems technology in the years 2004 and 2008. The aim of the work is to evaluate the influence of parameters entering the model, estimate parameters of the first and second grades of the network structures and present the results of the deformation analysis with graphic visualisation of individual processes and analyses. Four types of cofactors or weights were used to process and adjust the observations as recommended by the manufacturer of the GNSS receiver by way of substitution of a covariance matrix from the Spectrum Survey using RMS and constant 1 as an a priori nominal variance factor. The MINQUE method was also used to estimate cofactors of the observation components. The greatest weights were estimated by the application of the MINQUE method and assigned to their vectors. Based on the coordinate estimates of the determined points, a solution with cofactors using the covariance matrix proved to be the one that has the least deviations. From the viewpoint of standard deviations, the solution using the covariance matrixes from the Spectrum Survey achieved the highest degree of accuracy. Numerical results from processing showed the use of the MINQUE method as a suitable alternative to laborious input of covariance matrixes into the Spectrum Survey software environment.
Niniejsza praca dotyczy analizy deformacji geodezyjnych sieci 3D w elektrowni wodnej Cierny Vah zaobserwowanych za pomocą technologii nawigacji satelitarnej w latach 2004 i 2008. Celem pracy jest ocena wpływu parametrów wprowadzanych do modelu, oszacowanie parametrów pierwszego i drugiego stopnia struktury sieci oraz przedstawienie wyników analizy zniekształceń za pomocą graficznej wizualizacji poszczególnych procesów i analiz. Cztery typy kofaktorów zostały użyte do przetworzenia i dostosowania obserwacji zgodnie ze wskazówkami producenta odbiornika GNSS (Global Navigation Satellite Systems) poprzez zastąpienie macierzy kowariancji z pomiaru widma przy użyciu RMS oraz stałej 1 jako wariancji nominalnej. Metoda MINQUE została również zastosowana w celu określenia kofaktorów komponentów obserwacyjnych. Największe wagi zostały oszacowane przez zastosowanie metody MINQUE i przypisanie im wektorów. Bazując na szacunkowych współrzędnych określonych punktów, rozwiązaniem okazał się być wybór kofaktorów z użyciem macierzy kowariancji ze względu na najmniejsze odchylenia. Z punktu widzenia odchyleń standardowych, wybór macierzy kowariancji z badania widm osiągnął najwyższy stopień dokładności. Wyniki liczbowe otrzymane z przetworzenia danych pokazały, że użycie metody MINQUE jest odpowiednią alternatywą dla żmudnego wprowadzania macierzy kowariancji do środowiska programistycznego.
Źródło:
Inżynieria Mineralna; 2014, R. 15, nr 1, 1; 55-68
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of precise point positioning algorithm to support advanced driver assistant functions for inland vessel navigation
Autorzy:
Lass, C.
Ziebold, R.
Powiązania:
https://bibliotekanauki.pl/articles/2063986.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
real tme kinematic
Global Navigation Satellite Systems
state space representation
VHF Data Exchange System
precise point positioning
navigation and timing
Automatic Identification System
inland navigation
Opis:
Bridge passing and passing waterway locks are two of the most challenging phases for inland vessel navigation. In order to be able to automate these critical phases very precise and reliable position, navigation and timing (PNT) information are required. Here, the application of code-based positioning using signals of Global Navigation Satellite Systems (GNSS) is not sufficient anymore and phase-based positioning needs to be applied. Due to the larger coverage area and the reduction of the amount of correction data Precise Point Positioning (PPP) has significant advantages compared to the established Real Time Kinematic (RTK) positioning. PPP is seen as the key enabler for highly automatic driving for both road and inland waterway transport. This paper gives an overview of the current status of the developments of the PPP algorithm, which should finally be applied in advanced driver assistant functions. For the final application State Space Representation (SSR) correction data from SAPOS (Satellitenpositionierungsdienst der deutschen Landesvermessung) will be used, which will be transmitted over VDES (VHF Data Exchange System), the next generation AIS.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 781--789
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sources of error in satellite navigation positioning
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/116711.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite Systems (GNSS)
satellite navigation positioning
source of errors
satellite navigation
Dilution of Precision (DOP)
User Equivalent Range Error (UERE)
User Range Error (URE)
User Equipment Error (UEE)
Opis:
An uninterrupted information about the user’s position can be obtained generally from satellite navigation system (SNS). At the time of this writing (January 2017) currently two global SNSs, GPS and GLONASS, are fully operational, two next, also global, Galileo and BeiDou are under construction. In each SNS the accuracy of the user’s position is affected by the three main factors: accuracy of each satellite position, accuracy of pseudorange measurement and satellite geometry. The user’s position error is a function of both the pseudorange error called UERE (User Equivalent Range Error) and user/satellite geometry expressed by right Dilution Of Precision (DOP) coefficient. This error is decomposed into two types of errors: the signal in space ranging error called URE (User Range Error) and the user equipment error UEE. The detailed analyses of URE, UEE, UERE and DOP coefficients, and the changes of DOP coefficients in different days are presented in this paper.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 419-423
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
G4 Multi-constellation Precise Point Positioning service for high accuracy offshore navigation
Autorzy:
Tegedor, J.
Ørpen, O.
Melgård, T.
Łapucha, D.
Visser, H.
Powiązania:
https://bibliotekanauki.pl/articles/115985.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite Systems (GNSS)
high accuracy offshore navigation
Precise Point Positioning (PPP)
Integer-Ambiguity Resolution (IAR)
G4 system architecture
Multi-constellation Precise Point Positioning Service
offshore navigation
positioning accuracy
Opis:
Fugro is operating a global GNSS infrastructure for the delivery of high-accuracy multi-constellation Precise Point Positioning (PPP) service, named G4. Precise orbit and clock for all global satellite navigation systems are estimated in real-time and broadcast to the users using geostationary satellites. End-users with a G4-enabled receiver are able to obtain sub-decimeter positioning accuracy in real-time. The system has been tailored for offshore applications where a nearby GNSS station is not always readily available. G4 offers seamless integration of GPS, GLONASS, Galileo and BeiDou in the navigation solution, therefore allowing the user to obtain a reliable and accurate position even in challenging environments, especially in presence of interference, scintillation or partial sky visibility. In addition, carrier-phase integer-ambiguity resolution (IAR) is supported, for those users requiring the highest possible navigation accuracy. This paper presents the G4 system architecture and current performance. The benefits of multi-constellation Precise Point Positioning (PPP) are shown in terms of increased availability, robustness and accuracy.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 425-429
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Signal Research for Alternative Baltic Navigation System
Autorzy:
Dziewicki, M.
Młotkowski, J.
Stupak, T.
Powiązania:
https://bibliotekanauki.pl/articles/1841574.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
navigation systems
Baltic Navigation System
Global Navigation Satellite System (GNSS)
IALA recommendations
Horizontal Dilution of Precision
Real Time Kinematic (RTK)
Opis:
In the project R-Mode a navigation system for Baltic Sea is designed. In the range of these actions in summer of 2020 the signal for DGPS base station Rozewie were adopted and measurements on the sea were performer. This experiment is shown in the article.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 4; 799-802
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Effect of Time Delay on the Integrated GNSS/INS Navigation Systems
Autorzy:
Yang, C.K.
Shim, D.S.
Powiązania:
https://bibliotekanauki.pl/articles/115995.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
time delay
inertial navigation system (INS)
Global Navigation Satellite System (GNSS)
computer simulation
Opis:
The performance of tightly coupled GNSS/INS integration is known to be better than that of loosely coupled GNSS/INS integration. However, if the time synchronization error occurs between the GNSS receiver and INS(Inertial Navigation System), the situation reverses. The performance of loosely coupled GNSS/INS integration and tightly coupled GNSS/INS integration is analyzed and compared due to time synchronization error by computer simulation.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 2; 199-204
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
VR teleoperation to support a GPS-free positioning system in a marine environment
Autorzy:
Lager, M.
Topp, E. A.
Malec, J.
Powiązania:
https://bibliotekanauki.pl/articles/1841575.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
navigation systems
autonomous surface vehicle
graphical user interface
Global Positioning System
Global Navigation Satellite System
unmanned ground vehicles
terrain-aided navigation
VR teleoperation
Opis:
Small autonomous surface vehicles (ASV) will need both teleoperation support and redundant positioning technology to comply with expected future regulations. When at sea, they are limited by a satellite communication link with low throughput. We have designed and implemented a graphical user interface (GUI) for teleoperation using a communication link with low throughput, and one positioning system, independent of the Global Positioning System (GPS), supported by the teleoperation tool. We conducted a user study (N=16), using real-world data from a field trial, to validate our approach, and to compare two variants of the graphical user interface (GUI). The users experienced that the tool gives a good overview, and despite the connection with the low throughput, they managed through the GUI to significantly improve the positioning accuracy.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 4; 789-798
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The geometrical factors of a navigational systems
Autorzy:
Banachowicz, A.
Banachowicz, G.
Wolski, A.
Powiązania:
https://bibliotekanauki.pl/articles/224416.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
systemy nawigacyjne
pozycjonowanie satelitarne
GPS
system pozycjonowania obiektów
DGPS
nawigajca morska
navigational systems
satellite positioning
Global Positioning System
maritime navigation
Opis:
Vessels engaged in coastal navigation must have their position determined with high accuracy. This can be ensured only by satellite systems such as GPS and GLONASS. The paper presents generalized concepts of geometrical factors of a navigational system. Such factors are used in the analysis of the accuracy of various radionavigational systems aimed at selecting the best system for a given area. The modern process of navigation is described in a four-dimensional space - three geometric dimensions and time. For this reason both the description and analysis of navigational systems should be performed in the same space. The traditional geometric factor of the land-based radionavigational system was generalised to include the factors GDOP, PDOP, HDOP, VDOP and TDOP for the needs of the accuracy analysis of a GPS system. These terms are related to the so-called geometry of navigational system - through mutually related positions of gradients of navigational functions determining position Iines (hyperplanes). They are connected with non-Iinear regression through a probabilistic relation between the measured navigational parameters. Consequently, the concept of geometric factors in the process of navigational parameters estimation can be also extended to include a larger number of dimensions appropriate for the state vector.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 261-267
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodical fundamentals of creation of permanent GPS networks
Autorzy:
Uchytel, I. L.
Jaroshenko, V. N.
Kapochkin, B. B.
Powiązania:
https://bibliotekanauki.pl/articles/224403.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
systemy nawigacyjne
geodezja satelitarna
nawigacja satelitarna
GPS
system pozycjonowania obiektów
pozycjonowanie satelitarne
sieć geodezyjna
navigational systems
satellite geodesy
satellite navigation
Global Positioning System
satellite positioning
geodetic network
Źródło:
Reports on Geodesy; 2006, z. 1/76; 293-300
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positioning Using GPS and GLONASS Systems
Autorzy:
Kujawa, L.
Rogowski, J. B.
Kopańska, K.
Powiązania:
https://bibliotekanauki.pl/articles/116742.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Global Positioning System GPS
GLONASS
Precise Positioning
Positioning Accuracy
Geometric Dilution of Precision (GDOP)
Horizontal Dilution of Precision (HDOP)
DOP Analysis
Opis:
This paper presents an experiment involving the processing of observations using the GPS and GPS/GLONASS systems performed at the BOGO, BOGI, and JOZ2 IGS stations. Due to the small number of GLONASS satellites, the authors failed to receive any significant improvement in positioning accuracy using GPS and GLONASS observations jointly.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 283-286
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Russian ALFA System in the Context of the Development of Radionavigation in the 21st Century
Autorzy:
Felski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2063950.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
navigational systems
radionavigation
ALFA system
marine navigation
ground-based radionavigation system
ground-based augmentation system
Global Navigation Satellite System
21st century challenges
Opis:
For nearly the entire post-World War II period, naval and air navigation relied primarily on ground-based radionavigation systems. However, the spontaneous development of satellite systems gradually led to their disappearance. They are currently used partly in air operations and marginally in maritime navigation in some areas around Asia, in Russia and in the Middle East. However, at the beginning of the 21st century, the threat of effective interference with satellite systems began to be raised, which led to an increased interest in restoring or upgrading ground-based systems as backup systems in the Western world. In this context, the approach of Russia is interesting, as it is associated with the vast majority of deliberate GPS interference. There are reports in the world literature that various ground-based radionavigation systems operating in Russia are still observed. The article analyses, on the basis of the few available sources, information on the ALFA system, about which the least is known, and there are many indications that it is ready for use.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 723--728
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of flying objects position
Autorzy:
Dzunda, M.
Dzurovcin, P.
Melniková, L.
Powiązania:
https://bibliotekanauki.pl/articles/116434.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Electronic Chart Systems
flying objects (FO)
flying objects position
Matlab
non-flying objects
positioning
Global Navigation Satellite System (GNSS)
dilution of precision (DOP)
Opis:
This paper describes various methods of flying object positioning with the emphasis on their accuracy. Based on the accomplished analysis, we will select the most appropriate method to determine the position of a flying object for relative navigation purposes. The primary criterion for choosing a positioning method is the accuracy of distance measurement within users working in the aviation communications network. The results presented in the paper have been based on mathematical modelling and computer simulation performed in the Matlab programming environment. The results obtained can be used to navigate flying or non-flying objects that work in the air communications network.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 2; 423-428
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemy lokalizacji satelitarnej w analizie zachowań przestrzennych użytkowników miasta
Global Sattelite Navigation Systems in the analysis of spatial behaviours of city users
Autorzy:
Rzeszewski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1023285.pdf
Data publikacji:
2015-12-20
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
GPS
satellite localisation
human spatial behaviour
city users
lokalizacja satelitarna
zachowania przestrzenne
użytkownicy miasta
Opis:
W artykule omówiono aspekty metodyczne oraz etyczne wykorzystania technologii lokalizacji satelitarnej w badaniach nad zachowaniami przestrzennymi człowieka. Na przykładzie badań przeprowadzonych w trakcie projektu EBEH przedstawiono typowe problemy występujące podczas analizy danych pochodzących z pasywnych odbiorników GPS. Omówione zostały potencjalne błędy i niedostatki wynikające z zastosowania tej metody oraz możliwe działania zaradcze. Zaproponowano również wizje przyszłego wykorzystania satelitarnych systemów lokalizacji w geografii człowieka i łączenia ich z technikami badań społecznych na zasadzie triangulacji metodologicznej.
Paper discuss methodical and ethical aspects of using satellite localisation systems in human spatial behaviour research. Real-life examples from EBEH project are given that show typical issues of analysing data from passive GPS receivers. Potential mistakes and failures are of this method are described as well as possible solutions. Author discuss possible future development of GNSS methods in human geography with the adoption of methodological triangulation.
Źródło:
Rozwój Regionalny i Polityka Regionalna; 2015, 31; 111-121
2353-1428
Pojawia się w:
Rozwój Regionalny i Polityka Regionalna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conception of EGNOS Integrity Data Utilization in ENC Systems
Autorzy:
Bilewski, M.
Zalewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/117265.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
EGNOS
Electronic Chart Display and Information System (ECDIS)
Marine Vessel Protection Area (MVPA)
Electronic Navigational Charts (ENC)
Full Mission Bridge Simulator (FMBS)
integrity
Opis:
The paper presents the processing of EGNOS integrity data received either directly from the satellite network or the Sisnet internet relay. Relationship between the individual frames in EGNOS messages has been described. Usefulness of these data was indicated by the three examples. In the first example data form EGNOS was used to compare integrity parameters and the calculated position error. In further examples the simulated position with error and calculated integrity parameters were implemented together. The results were presented in two ways: with use of dedicated program which presents only ship contours (the one not covering GNSS uncertainty and the one covering this uncertainty called Marine Vessel Protection Area) and as a layer in existing ECDIS.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 389-393
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of an autonomous Global Navigation Satellite System ground station and its calibration for monitoring of local ionospheric perturbations
Autorzy:
Galas, R.
Čokrlić, M.
Powiązania:
https://bibliotekanauki.pl/articles/135456.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
local ionospheric perturbations
scintillations
single autonomous GNSS monitoring station
continuously monitoring GNSS ground systems
autonomous power management
real-time processing
hardware calibration
Opis:
A state-of-the-art monitoring global navigation satellite system (GNSS) system has been originally designed and developed for various positioning and atmosphere-sensing purposes by the authors and updated to fulfil the challenging requirements for monitoring of ionospheric perturbations. The paper discusses various scientific and technically challenging issues, such as the requirement for an autonomous operating ground GNSS station and how this can be fulfilled. Basic algorithms for monitoring of local ionospheric perturbations with GNSS receivers are described. The algorithms require that inter-frequency hardware biases be known. Although the satellite transmitter biases can be obtain from the IGS services, the user takes responsibility for the estimation of frequency dependent receiver hardware biases and for the control of their variations. The instrumental signal delays are important for timing applications and GNSS monitoring of the ionosphere and are also required for recovering of the integer carrier-phase ambiguities. The paper presents an algorithm for calibration of inter-frequency biases of global positioning system (GPS) receivers and validates the first set of results.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 54-59
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy Evaluation of Real-Time GNSS Precision Positioning with RTX Trimble Technology
Ocena dokładności precyzyjnego pozycjonowania GNSS w czasie rzeczywistym z wykorzystaniem technologii RTX Trimble
Autorzy:
Ochałek, A.
Niewiem, W.
Puniach, E.
Ćwiąkała, P.
Powiązania:
https://bibliotekanauki.pl/articles/395769.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Global Navigation Satellite System
data processing
statistical analysis
real-time systems
GNSS
przetwarzanie danych
analiza statystyczna
systemy czasu rzeczywistego
Opis:
In this paper, authors present results of accuracy verification of the Trimble RTX technology. The GNSS receiver Spectra Precision SP60 was used in Cyprus (Kato Paphos Archaeological Park). To evaluate the accuracy of the receiver, two measuring test networks (consisting of 30 and 55 control points) were established. All points were determined in four measuring cycles. Additionally, in order to make more advanced analysis of the data, the bases were also measured by using another GNSS receiver - Geomax-Zenith 25. The point positions, in this case, were conducted in the local coordinate system of Kato Paphos Archaeological Park by using RTK positioning technology. To make a comparison, it was necessary to transform the coordinates based on different groups of fitting points. Analysis allowed to conclude that the Spectra Precision SP60 receiver and the RTX Trimble technology guarantee repeatable results (on the level of 4 cm) of point positioning measurements.
W artykule autorzy przedstawiają wyniki analizy dokładności technologii Trimble RTX. Odbiornik GNSS Spectra Precision SP60 wykorzystano podczas badań na Cyprze (Park Archeologiczny Kato Pafos). Aby ocenić dokładność odbiornika, ustalono dwie bazy testowe (składające się z 30 i 55 punktów kontrolnych). Wszystkie punkty zostały określone w czterech cyklach pomiarowych. Dodatkowo, w celu bardziej zaawansowanej analizy danych, pomiary zostały również wykonane przy użyciu innego odbiornika GNSS - Geomax-Zenith 25. Pozycjonowanie w tym przypadku, zostało przeprowadzone w lokalnym układzie współrzędnych parku archeologicznego Kato Pafos z wykorzystaniem technologii pozycjonowania RTK. W celu porównania wyników badań konieczne było przetransformowanie współrzędnych do jednego układu. Transformację wykonano na podstawie różnych grup punktów dostosowania. Analiza otrzymanych wyników pozwoliła stwierdzić, że odbiornik Spectra Precision SP60 i technologia RTX Trimble gwarantują porównywalne wyniki pozycjonowania (na poziomie 4 cm).
Źródło:
Civil and Environmental Engineering Reports; 2018, No. 28(4); 49-61
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
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