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    Wyświetlanie 1-9 z 9
    Tytuł:
    Satellite and Terrestrial Radionavigation Systems on European Inland Waterways
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/116145.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Inland Waterways
    Inland Navigation
    Satellite Radionavigation System
    Terrestrial Radionavigation system
    satellite navigation system
    Radionavigation
    satellite based augmentation system (SBAS)
    EGNOS
    Opis:
    The usefulness for all sea users of Satellite Navigation Systems (SNS), Satellite Based Augmentation Systems (SBAS) and Automatic Identification System (AIS) is well known. The possibility, actual and future, of the utilization of all these systems on European inland waterways, GPS augmented by IALA DGPS reference stations, GPS augmented by European SBAS – EGNOS from direct Signal–in–Space (SIS) and GPS augmented by EGNOS from re–transmission over AIS, is presented in this paper. The operational systems, such as the German network IALA DGPS and DoRIS, and planned system such as GALEWAT, MARGAL, MUTIS and MARUSE are described also.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 2; 121-126
    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 assessment of the character and usefulness of the information available on the internet about state-owned satellite navigation and satellite-based augmentation systems
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/135444.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    satellite navigation system
    satellite based augmentation system (SBAS)
    internet
    availability
    character of information
    usefulness of information
    Opis:
    To date, a ship’s position can generally be obtained from functional satellite navigation systems (SNS), such as Global Position Systems (GPS and GLONASS), and Satellite-Based Augmentation Systems (SBAS), such as (European Geostationary Navigation Overlay Service (EGNOS), GPS-Aided Geo Augmented Navigation system (GAGAN), MTSAT Satellite Augmentation System (MSAS) and Wide Area Augmentation System (WAAS). Sometimes these systems are collectively called Global Navigation Satellite Systems (GNSS). Two more SNS, Galileo and BeiDou, one more SBAS, System for Differential Corrections and Monitoring (SDCM), and new regional systems, such as Quasi-Zenith Satellite System (QZSS) in Japan and Indian Regional Navigation Satellite System (IRNSS) in India, are also under construction. Information about all of these 11 systems is available on the internet. The number of links and the type of the information obtained from two search engines, Google and Bing, for the different keywords concerning each system are shown in the paper. Additionally, the analysis of the character and usefulness of the information placed on the pages of governmental organizations and institutions administering the above-mentioned systems, manufacturers of the satellites, receivers and different kinds of the institutional users is also provided.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 123-127
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    Nominal and Real Accuracy of the GPS Position Indicated by Different Maritime Receivers in Different Modes
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/117133.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Navigation Satellite System (GNSS)
    Global Positioning System GPS
    Navigational System
    Navigational System Receiver
    Accuracy of Position
    GPS Receiver
    GPS Position Accuracy
    Dilution of Precision (DOP)
    Opis:
    Nowadays on the ship’s bridge two or even more GPS receivers are installed. As in the major cases the coordinates of the position obtained from these receivers differ the following questions can be posed – what is the cause of this divergence, which receiver in the first must be taken into account etc. Based on information published in annual GPS and GNSS receiver survey it was estimated the percentage of GPS receivers designed for marine and/or navigation users. The measurements of GPS position based on the four different stationary GPS receivers were realized in the laboratory of Gdynia Maritime University in Poland in the summer 2012. The coordinates of the position of all these receivers were registered at the same time. The measurements in mode 3D were made for different input data, the same for all receivers. The distances between the individual unit’s antenna were considered also. Next measurements in mode 3D also were realized on two ships in different European ports. Additional measurements were made in mode 2D with three receivers for different their’s antenna heights. The results showed that the GPS position accuracy depends on the type of the receiver and its technical parameters particularly.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 11-19
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Installed base of GNSS devices and total revenue of GNSS device sales in different modes of transport
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/393834.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    satellite navigation system
    GNSS
    GNSS devices
    mode of transport
    system nawigacji satelitarnej
    urządzenia GNSS
    rodzaj transportu
    Opis:
    Since many years the most frequently method used for position fix in transport are global satellite navigation systems (SNS) as GPS and GLONASS and Satellite Based Augmentation System as EGNOS, GAGAN, MSAS and WAAS. Next global SNS (Galileo and BeiDou) and SBAS (SDCM) and KAAS) are under construction. The generic name given to all these mentioned above systems is Global Navigation Satellite System (GNSS). Since 2010 GNSS Market Report, edited by the European GNSS Agency (GSA), takes a comprehensive look at the global GNSS market providing detailed analysis per market segment (currently 9 segments) and application type (currently depending on segment 4, 8, 11 or 13). In order to show the different distributions of these two parameters in different continents the world was divided into six regions (European Union, Russia and Europe without European Union, North America, Asia‒Pacific, Middle East and Africa, South America and Caribbean). The distributions of installed base of GNSS device and total revenue of GNSS devices sales by region and application in selected years for all four modes of transport (area, maritime, rail and road) are presented. In these analysis new and emerging GNSS trends by all these modes and the population numbers in each region was taken into account also.
    Źródło:
    Archives of Transport System Telematics; 2018, 11, 3; 19-23
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New satellite navigation systems and moderenization of current systems, why and for whom?
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359026.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    GPS system
    GLONASS system
    Galileo system
    satellite block
    satellite signals
    Opis:
    Information about user’s position can be obtained from specialized electronic position-fixing systems, in particular, Satellite Navigation Systems (SNS) as GPS and GLONASS, and Satellite Based Augmentation Systems (SBAS) as EGNOS, WAAS, MSAS. All these systems are known also as GNSS (Global Satellite Navigation System). As the number of GPS and GLONASS satellites visible by the user is sometimes in restricted area not sufficient, and these SNS cannot provide information about integrity, there is one service for civil users only etc., new systems, global as well as regional, must be constructed. The last years gave a rise to many important changes in the operational status and practical exploitation of all these systems. New SNS as Galileo in Europe and Compass (Beidou) in China, new SBAS as GAGAN in India and SDCM in Russia, new regional SNS as IRNSS in India and QZSS in Japan are actually under construction. Additionally the new satellite blocks as GPS IIF and III, and GLONASS K1 and K2, the new signals as GPS L5 and L1C, and GLONASS LC3OC and L1OC, the new services and possible applications of the future system Galileo are presented in this paper.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 58-64
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of geometry of Galileo and GPS in maritime and urban restricted area
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/320605.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    satelitarne systemy nawigacyjne
    GPS
    Galileo
    satellite navigation systems
    Galileo system
    Opis:
    In open area the accuracy of the observer’s position obtained from the satellite navigation systems depends on a number of satellites (ls) visible above masking elevation angle (Hmin) and the geometry of systems – GDOP coefficient. In restricted area (coastal navigation, urban area) system accuracy depends on the parameters mentioned for open area and the dimensions and situated area of the obstacles additionally. The calculations were made for the observer situated on the ship sailing along the coast and in the middle of the street for different obstacles heights for Galileo system and for GPS system. Street parameters were: the street axis azimuth and latitude phi.
    Źródło:
    Annual of Navigation; 2003, 6; 37-48
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geometry of GPS and GLONASS for different number of operational satellites
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/320847.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    nawigacja
    nawigacja satelitarna
    radionawigacja
    GPS
    navigation
    satellite navigation systems
    radionavigation system
    Opis:
    Nowadays there are two world wide satellite navigation systems - American GPS and Russian GLONASS. Distribution (in per cent) and comparison (in per cent) of GDOP (Geometric Dilution Of Precision) coefficient values for different number of operational satellites for the observer at different latitude for different masking elevation angle for both systems are demonstrated in this paper.
    Źródło:
    Annual of Navigation; 2000, 2; 47-56
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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