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    Wyświetlanie 1-3 z 3
    Tytuł:
    Polish DGPS System: 1995-2018 – studies of reference station operating zones
    Autorzy:
    Specht, C.
    Specht, M.
    Dąbrowski, P. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/117143.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Navigation Satellite System (GNSS)
    Polish DGPS System
    reference station operating zones
    history of navigation
    Differential GPS (DGPS)
    DGPS Reference Station
    positioning system
    Global Positioning System (GPS)
    Opis:
    The operating zone of a radio navigation system is one of its main operating features. It determines the size of a water body in which the system can be used, while guaranteeing vessels’ navigation safety. The DGPS system in the LF/MF range is now the basic positioning system in coastal waters around the world, which guarantees not only metre positioning accuracy, but it is also the only one to provide navigators with signals on positioning reliability. This paper describes and summarises over twenty years of studies dealing with the operating zone of the Polish DGPS reference station network. This paper is the fifth in a series of publications whose aim was to present in detail the process of installation, testing and long-term evaluation of the navigational parameters of the Polish DGPS system, launched in 1995. This paper includes the theoretical foundations of determination of the Dziwnów and Rozewie DGPS reference station operating zones in the years 1995-2018. Moreover, it presents the measurement results for the signal levels and the results of their analyses, which determine the station operating zones.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 581-586
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accuracy analysis of aircraft position at departure phase using dgps method
    Autorzy:
    Krasuski, Kamil
    Ćwiklak, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/386558.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    DGPS method
    accuracy
    GBAS
    reference station
    RTK
    Opis:
    The aim of this paper is to present the problem of implementation of the Differential Global Positioning System (DGPS) tech-nique in positioning of the aircraft in air navigation. The aircraft coordinates were obtained based on Global Positioning System (GPS) code observations for DGPS method. The DGPS differential corrections were transmitted from reference station REF1 to airborne receiver using Ultra High Frequency (UHF) radio modem. The airborne Thales Mobile Mapper receiver was mounted in the cabin in Cessna 172 aircraft. The research test was conducted around the military aerodrome EPDE in Dęblin in Poland. In paper, the accuracy of aircraft positioning using DGPS technique is better than 1.5 m in geocentric XYZ frame and ellipsoidal BLh frame, respectively. In addition, the obtained accu-racy of aircraft positioning is in agreement with International Civil Aviation Organization (ICAO) Required Navigation Performance (RNP) technical standards for departure phase of aircraft. The presented research method can be utilised in Ground-Based Augmentation System (GBAS) in air transport. In paper, also the accuracy results of DGPS method from flight test in Chełm are presented. The mean values of accuracy amount to ±1÷2 m for horizontal plane and ±4÷5 m for vertical plane.
    Źródło:
    Acta Mechanica et Automatica; 2020, 14, 1; 36-43
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Network static DGPS positioning for medium-long distances
    Autorzy:
    Bakuła, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/320434.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    DGPS
    sieć stacji odniesienia
    network of reference station
    Opis:
    The use of a network of reference stations instead of a single reference station allows to model some systematic errors in a region, and to increase the distance between the rover receiver and reference stations. GPS reference stations exist in some countries, and GPS observations are available for users in real-time mode and in post-processing. The paper presents DGPS post-processing positioning with the use of three reference stations at the same time. The traditional DGPS is based on one reference station. It has been shown that the accuracy of such positioning is about 1 - 2 meters, depending on the number of satellites and the value of PDOP (Position Dilution of Precision). The accuracy of DGPS positioning degrades when the distance between the rover and the receiver station is increased. The paper shows that when we use three reference stations simultaneously, we can create pseudorange corrections for a virtual reference station, located in the vicinity of an unknown station. Three reference stations give redundant observations and enable to reduce the values of some measurement errors and biases. Practical calculations and analysis of accuracy have been presented for medium-long distances between the rover station and references.
    Źródło:
    Annual of Navigation; 2007, 12; 5-14
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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