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Wyświetlanie 1-10 z 17
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
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:
Detection of Spoofing using Differential GNSS
Autorzy:
Ochin, E.
Powiązania:
https://bibliotekanauki.pl/articles/135172.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
DGNSS
LADGNSS
RADGNSS
WADGNSS
GPS
Differential Station
reference station
Radio Beacon
antiterrorism
antispoofing
transport safety
Opis:
One of the main problems in modern navigation of both manned and unmanned transport systems is that of transport safety. Differential GNSS technology has been used to improve the accuracy of transport positioning, in which position is calculated relative to a fixed reference station with a known position XYZ. Unfortunately, GNSS is vulnerable to malicious intrusion. GNSS signals and/or correction signals from the reference station can be spoofed by false signals, and special receivers have been used to provide defenses against such attacks. But how can the roving receiver (i.e. the user) be sure that the information they receive is authentic? Spoofing is the transmission of a matched-GNSS-signal-structure and/or signals to a reference station in order to cause interference and attempt to commandeer the tracking loops of a victim receiver, thereby allowing manipulation of the receiver’s timing or navigation solution. A spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters, or it can be co-located with its victim. In this article we consider the principles of spoofing detection using Differential GNSS, in which a correction signal from the reference station is used for the detection of spoofing.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 50 (122); 59-67
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ten years of establishment of the satellite reference station system EUPOS in Central and Eastern Europe
Autorzy:
Graszka, W.
Rosenthal, G.
Śledziński, J.
Powiązania:
https://bibliotekanauki.pl/articles/225321.pdf
Data publikacji:
2012
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
reference station
EUPOS
Eastern Europe
Central Europe
stacje referencyjne
Europa Wschodnia
Europa Centralna
Źródło:
Reports on Geodesy; 2012, z. 2/93; 11-24
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flexible Software Design for Korean WA-DGNSS Reference Station
Autorzy:
Choi, W.S.
Chhattan, S.S.
Kye, J.E.
Han, W.Y.
Yun, H.
Kee, C.
Powiązania:
https://bibliotekanauki.pl/articles/116770.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Flexible Software Design
Wide area Reference Station (WRS)
Opis:
In this paper, we describe the software design results of WA‐DGNSS reference station that will be constructed in Korea in the near future. Software design of the WRS (Wide area Reference Station) is carried out by applying object oriented software methodology in order to provide flexibilities: easy of model change (namely ionospheric delay model etc) and system addition (Galileo, GLONASS in addition to GPS etc). Software design results include the use case diagrams for the functions to be executed, the architecture diagram showing components and their relationships, the activity diagrams of behaviors and models among them, and class diagrams describing the attribute and operation.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 75-78
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
RTN measurements accuracy test in reference to MSPP
Test dokładności pomiarów RTN w odniesieniu do MSPP
Autorzy:
Uznański, A.
Powiązania:
https://bibliotekanauki.pl/articles/385703.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Real Time Networks
protokół Ntrip
wirtualne stacje referencyjne
real time networks
NTRIP
virtual reference station
Opis:
The RTN measurements in Poland date back to 2006, when the Małopolska System for Precision Positioning (MSPP) was started up. In 2008, the nationwide ASG-EUPOS system was put in operation in Poland. The paper presents the results of the test measurements aimed at evaluating the accuracy of position determination of points, based on the MSPP. The GPS static measurements, RTN measurements, tachymetric measurements and precision levelling were performed on 24 test points stabilised in the distances of approx. 12 km, 21 km and 34 km from the KRAW station located centrally in the MSPP. During the test measurements ca. 3000 positions of points were determined altogether, using the following mountpoints: RTCM_FKP, RTCM_23VRS, RTK3.0 (RTCM 3.0 VRS) and KRAW_RTCM30. While analysing the averaged results of the measurements of the test points, it can be concluded that the information published on the MSPP website (regarding the point position accuracy of at least 3 cm for situation and 5 cm for height) is reflected in the measurement results. Taking into consideration each of the solutions individually, the values were indeed exceeded for the horizontal coordinates – 3.6% and for the height 5.6%, except for the Single Baseline solution, in which the height differences were only rarely below 5 cm.
W Polsce historia pomiarów RTN sięga praktycznie roku 2006, kiedy to uruchomiono regionalny Małopolski System Pozycjonowania Precyzyjnego (MSPP). W 2008 r. oddano do użytku ogólnopolski system ASG-EUPOS. W pracy przedstawiono wyniki pomiarów testowych, mających na celu ocenę dokładności wyznaczania pozycji punktów w oparciu o MSPP. Pomiary statyczne GPS, pomiary RTN, pomiary tachymetryczne oraz niwelację precyzyjną wykonano na 24 punktach testowych zastabilizowanych w odległościach ok. 12 km, 21 km i 34 km od stacji KRAW zlokalizowanej centralnie w MSPP. W pomiarach testowych wyznaczono łącznie ok. 3000 pozycji punktów, korzystając z mountpointów: RTCM_FKP, RTCM_23VRS, RTK3.0 (RTCM 3.0 VRS) oraz KRAWRTCM30. Analizując wyniki pomiarów punktów testowych zgeneralizowane do wartości średnich, należy stwierdzić, że podawane na stronie MSPP informacje o dokładności wyznaczenia pozycji punktu nie gorszej niż 3 cm sytuacyjnie i 5 cm wysokościowo znalazły potwierdzenie w wynikach pomiarów. Biorąc pod uwagę każde z rozwiązań indywidualnie, należy stwierdzić, iż wartości te bywały jednak przekraczane w przypadku współrzędnych sytuacyjnych 3,6% oraz wysokości 5,6%, z wyłączeniem rozwiązania Single Baseline, w którym różnice wysokości tylko sporadycznie były mniejsze od 5 cm.
Źródło:
Geomatics and Environmental Engineering; 2009, 3, 2; 81-90
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation of ASG-EUPOS POZGEO sub-service in the event of failure of reference stations used in the standard solution – case study
Autorzy:
Kudas, Dawid
Wnęk, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/100338.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
POZGEO
reference station failure
validation
automatic post-processing
awaria stacji referencyjnej
uprawomocnienie
automatyczne przetwarzanie końcowe
Opis:
The validation of the work of computational algorithms operating within the positioning system services under unusual measuring conditions is an important part of the entire system. Particularly noteworthy conditions are failures of reference stations forming the examined station network. The article evaluates the operation of the algorithm implemented to the POZGEO sub-service of the ASG-EUPOS system in the event of failure of reference stations used in the standard determination of the coordinates of the selected spatial point. The research material consisted of 117 days of continuous determination of the position of the selected spatial point using 1 hour of GPS static observations. Reports on the procedure of determining the position in the post-processing mode in POZGEO sub-service of static satellite observations were used to simulate the reduction of the number of tie vectors in coordinates’ determination method. The resistance of the automatic post-processing algorithm to failure of parts from the standard reference stations used was assessed.
Źródło:
Geomatics, Landmanagement and Landscape; 2019, 4; 59-71
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metody PPP do określenia współrzędnych stacji referencyjnych na potrzeby systemu wspomagania GBAS w transporcie lotniczym
Application the PPP method for designation the coordinates of reference stations for purpose of the GBAS augmentation system in air transport
Autorzy:
Krasuski, K.
Jafernik, H.
Powiązania:
https://bibliotekanauki.pl/articles/312075.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
metoda PPP
stacja referencyjna
system wspomagania GBAS
transport lotniczy
PPP method
reference station
GBAS augmentation system
air transport
Opis:
W artykule przedstawiono rezultaty wyznaczenia współrzędnych stacji referencyjnych w systemie wspomagania GBAS w transporcie lotniczym. W tym celu wykorzystano programy APPS i magicPPP do określenia współrzędnych stacji referencyjnych w układzie ITRF2008. Obliczenia wykonano z użyciem metody pozycjonowania PPP dla nieróżnicowych obserwacji kodowo-fazowych GPS. Różnica współrzędnych stacji referencyjnych pomiędzy programami APPS i magicPPP wynosi mniej niż ±0.10 m.
Paper presents results of determination the coordinates of reference stations in GBAS augmentation system in air transport. For this purpose the APPS and magicPPP softwares were utilized for designation the coordinates of reference station in ITRF2008 frame. The computations were executed using positioning method of PPP for GPS undifference code and phase observations. Difference of coordinates of reference stations between APPS and magicPPP softwares is less than ±0.10 m.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 838-841, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Support to maritime and inland waterways service providers for the transmission of EGNOS Corrections via IALA beacons and AIS/VDES stations
Autorzy:
López, M.
Cano, M.
Martínez, R.
Álvarez, C.
Tavira, L.
Morán, J.
Antón, V.
Vázquez, J.
Powiązania:
https://bibliotekanauki.pl/articles/117535.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
inland waterways
IALA beacons
AIS stations
VDES stations
EGNOS
EGNOS corrections
AIS Service Manager (ASM)
Virtual Reference Station (VRS)
Opis:
The use of SBAS corrections for navigation, in both coastal waters and inland waterways, has already brought the attention of many European authorities, which are interested in its potential to complement/replace their DGPS radio beacon networks. The European GNSS Agency (GSA) has an active long-term trajectory working to foster the EGNOS adoption in maritime through the launch of several actions whose results will pave the way for the provision of maritime EGNOS services. In this line, GSA awarded the consortium ALG-Indra, ESSP and Alberding with the Specific Contract GSA/OP/07/13/SC24 ‘Support to Maritime Service Providers for the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations’. The main objective of this Specific Contract is to demonstrate the operational performance of the transmission of EGNOS corrections converted to Differential GPS corrections over the existing transmission infrastructure (AIS base stations/IALA beacons) in the Maritime and Inland Waterways (IWW) domains, while providing a detailed cost benefit analysis of the solutions proposed. This service may complement the current GNSS augmentation services exploiting synergies and benefiting from the current infrastructure and standards, facilitating the adoption of EGNOS by maritime and inland waterways authorities. Furthermore, the service has no impact at user level since the DGNSS corrections are transmitted over the existing infrastructure, in the same format and implementing the same integrity mechanisms required for traditional IALA beacons ([1]). This project will allow the maritime and IWW service providers to have a clear understanding about the technical, operational and economic feasibility of the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 45-52
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 17

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