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Wyświetlanie 1-15 z 115
Tytuł:
Static initial azimuth update method in land navigation systems
Autorzy:
Szymanowski, J.
Grzelak, J.
Popowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/320595.pdf
Data publikacji:
2003
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
nawigacja
navigation
land navigation systems
Opis:
The paper presents a method for the initial azimuth psi 0 selection in Land Navigation Systems (LNS), applying the ZUPT (Zero–velocity UPdaTe) technique. This technique is understood as a correction of the initial setting psi 0 achieve the best accuracy of the navigation. The case of the inaccurate initial azimuth during stopping of the vehicle (after short drive) in order to setting is considered. The first part of the work describes the Static Initial Azimuth uPdate (SIAP) method. Next, the vehicle stopping criteria and their influence on the accuracy of the navigation are discussed. Then, the initial azimuth optimization method is proposed. Finally, the simulation results and conclusions concerning further research are presented.
Źródło:
Annual of Navigation; 2003, 6; 91-101
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Susceptibility of the GPS navigation system to various types of interferences and threats
Autorzy:
Sulkowski, J.
Kowaleczko, P.
Powiązania:
https://bibliotekanauki.pl/articles/241538.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
navigation systems
interferences
threats
Opis:
This paper is devoted to the problem of the GPS navigation system’s susceptibility to various types of interferences and indicates in what way they may influence on navigation parameters. Basic principles of working of GPS receivers and possibilities of the influence on navigation parameters are discussed. Main advantages and disadvantages of using the navigation systems are indicated. In particular, moments of reception of satellites’ signals in relation to the distance of a satellite, diagram presenting the generation process of a signal emitted by a satellite, spectrum of the interfering electromagnetic wave with constant frequency and amplitude, failure to identify location in the GPS receiver, results of the studies concerning the influence of interference with the wave having constant frequency and amplitude, results of the studies concerning the influence of interference with the wave having constant frequency and changing amplitude, spectrum of the interfering signal – constant narrow-band sweeping wave, GPS receiver’s application after input of a real signal with correct identification of the location, GPS receiver’s application after input of the simulated signal of the satellite are presented in the paper.
Źródło:
Journal of KONES; 2014, 21, 4; 461-469
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The navigation infrastructure of airports and new trends in ATM
Autorzy:
Džunda, M.
Gédrová, N.
Melniková, L.
Powiązania:
https://bibliotekanauki.pl/articles/24201428.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
costs of transport
airport
navigation Infrastructure
navigation systems
satelite navigation systems
air traffic control
revenues
ILS
Opis:
Aim of publication is to introduce reader with general need and current situation of development of air traffic management systems and evaluation of actual operating network of aviation electronic support systems. The theme of the contribution is actual because there is currently an increase in the volume of the air traffic, which places increased demands on the safety level of air transport. Attempting to find new answers related to insufficient navigation systems has led aviation authorities to develop progressive systems based on cooperation with satellite navigation systems. Solution for capacity limited airports is development of system GBAS – Ground Based Augmentation System. The main purpose of publication is to present drafts of possible rationalization of navigation infrastructure of M.R. Stefanik airport. The effort to use the maximum potential of airspace consisted in the search for new concepts and trends in air traffic management based on the development of the technical pillar and new ways of managing the entire ATM system.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 665--671
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary results of DGPS/DGLONASS aircraft positioning in flight approaches and landings
Autorzy:
Grzegorzewski, M.
Jaruszewski, W.
Fellner, A.
Oszczak, S.
Wasilewski, A.
Rzepecka, Z.
Kapcia, J.
Popławski, T.
Powiązania:
https://bibliotekanauki.pl/articles/320789.pdf
Data publikacji:
1999
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
satelitarne systemy nawigacyjne
satellite navigation systems
Opis:
The use of satellite navigation by aerial craft becomes more and more common. Practically every newly produced plane or helicopter has GPS receiver installed on board. This system becomes widely used because it is simple and highly reliable. To improve the Required Performance Navigation Parameters (RNP), namely, the accuracy, availability, continuity, and integrity of aircraft navigation, the integrated GPS and GLONASS techniques can be used. Users are especially interested in integrated GPS/GLONASS receivers. The appearance of new ASHTECH GG24 receiver on the market has made it possible to estimate the possibility of utilisation of this type of receivers in aircraft navigation. The main goal of performed flight trials was the use of those receivers in satellite-based approaches and landings. The authors of the report carried out an experiment aiming at data collection during flight and approach to landing of plane TS11 Iskra. The airport of Deblin was chosen as the test area. The precise trajectory of the aircraft was calculated in the global WGS'84 system of co-ordinates for subsequent positions during flight, at one-second intervals, with the use of RTK techniques in "post-processing" mode. The RTK positions were compared with DGPS/DGLONASS real-time positions and next, the estimation of real-time differential accuracy was done. The preliminary results of the accuracy analysis are given in the paper.
Źródło:
Annual of Navigation; 1999, 1; 41-53
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Underwater navigation system based on Doppler shift – measurements and error estimations
Autorzy:
Ostrowski, Zawisza
Salamon, Roman
Kochańska, Iwona
Marszal, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/260234.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
underwater acoustics
navigation systems
Doppler shifts
Opis:
A new acoustic navigation system was developed to determine the position and speed of moving underwater objects such as divers and underwater vehicles. The path of an object and its speed were determined by the Doppler shifts of acoustic signals emitted by a transmitter placed on the object and received by four hydrophones installed at the periphery of the monitored body of water. The position and speed measurements were affected by errors mainly caused by acoustic reflections (returns) from the water body boundaries and surface reverberations. This paper discusses the source of the disturbances with the results of a simulation test and experimental measurements. It was demonstrated that the magnitude of the errors could be acceptable in most of the potential applications of the acoustic navigation system.
Źródło:
Polish Maritime Research; 2020, 1; 180-187
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visibility and geometry of GPS and GLONASS
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/320787.pdf
Data publikacji:
1999
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
satelitarne systemy nawigacyjne
satellite navigation systems
Opis:
Actually there are two world-wide satellite navigation systems - American GPS and Russian GLONASS. Distribution (%) of numbers of visible satellites and distribution (%) of GDOP (Geometric Dilution Of Precision) coefficient values for the observer at different latitude for different masking elevation angle for both systems are demonstrated in this paper.
Źródło:
Annual of Navigation; 1999, 1; 55-65
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated presentation of navigational data in a mobile navigation system for inland waters with the use of HUD
Autorzy:
Kazimierski, W.
Zaniewicz, G.
Bodus-Olkowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/134916.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
inland navigation
mobile navigation
mobile cartography
HUD
data
navigation systems
Opis:
Mobile devices are increasingly popular among recreational water users and for navigational purposes. Making full use of the possibilities they offer requires a navigational system to be designed and built for mobile devices which make use of mobile cartography. A dynamically adaptive mobile presentation model offering various display possibilities may be an appropriate example of such a system. The navigational purpose of the system, however, requires that the main navigational data presented are integrated in one place, in a so-called conning display. These data should be easily accessible to the user, which is not always the case with mobile devices. The idea of using a Head-Up Display (HUD) as a conning display in a mobile navigation system arose from these considerations. The current paper presents research on implementing a HUD into a mobile system. First, the idea of mobile cartographic presentation is discussed, then the navigational data available in the system are presented. Finally, the concept of using a HUD is explained, a HUD presentation model is shown and technical aspects of HUD integration are described.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 84-92
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survey of Radio Navigation Systems
Autorzy:
Gilski, P.
Stefański, J.
Powiązania:
https://bibliotekanauki.pl/articles/227025.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radio navigation
radio communication
satellite navigation systems
radiofrequency identification
Opis:
At present, there is a growing demand for radio navigation systems, ranging from pedestrian navigation to consumer behavior analysis. These systems have been successfully used in many applications and have become very popular in recent years. In this paper we present a review of selected wireless positioning solutions operating in both indoor and outdoor environments. We describe different positioning techniques, methods, systems, as well as information processing mechanisms.
Źródło:
International Journal of Electronics and Telecommunications; 2015, 61, 1; 43-48
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Snapshot RAIM algorithms availability in urban areas
Autorzy:
Nowak, A.
Specht, C.
Powiązania:
https://bibliotekanauki.pl/articles/320887.pdf
Data publikacji:
2006
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
RAIM
satelitarne systemy nawigacyjne
satellite navigation systems
Opis:
This paper presents some theoretical considerations concerned usage of Snapshot RAIM algorithms in city navigation. Influence of urban areas on RAIM Availability and Approximate Radial-Error Protected (ARP) is taken into consideration. Some results of numerical experiments are presented, too.
Źródło:
Annual of Navigation; 2006, 11; 73-88
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza autorskiego systemu nawigacji i wbudowanego narzędzia silnika Unity
Comparative analysis of the proprietary navigation system and the built-in Unity engine tool
Autorzy:
Kempny, Maciej
Barszcz, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1837835.pdf
Data publikacji:
2021
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
navigation systems
unity
navmesh
alchemynavigation
systemy nawigacji
Opis:
Systemy nawigacyjne to zaawansowane narzędzia, które pozwalają tworzyć postacie inteligentnie poruszające się po świecie gry. W ramach niniejszej pracy przeprowadzono analizę porównawczą autorskiego systemu nawigacji o nazwie AlchemyNavigation oraz wbudowanego narzędzia silnika Unity - systemu NavMesh. Do przeprowadzenia badań wykorzystano autorską aplikację zbudowaną przy pomocy silnika Unity, w ramach której zaimplementowano tożsame scenariusze badawcze bazujące na porównywanych systemach. Finalnie, na podstawie zebranych wyników oraz dokumentacji badanych systemów zrealizowana została analiza porównawcza, która dowiodła tezy że własne rozwiązania mogą dorównać rozwiązaniom domyślnym, a także, że pozwalają wprowadzać nowe funkcjonalności.
Navigation systems are advanced tools that allow you to create characters intelligently moving around the game world. The purpose of this thesis was to conduct a comparative analysis of the proprietary navigation system “AlchemyNavi-gation” and the built-in tool of the Unity engine - “NavMesh”. An proprietary application created with the Unity engine was used to conduct the research, under which identical scenarios based on the tested systems were implemented. Finally, on the basis of the collected results and documentation of the research objects, a comparative analysis was carried out and proved the thesis that own solutions can match the default solutions.
Źródło:
Journal of Computer Sciences Institute; 2021, 20; 217-224
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyki budowy stref działania i stref dokładności systemów nawigacyjnych : zapomniane narzędzia projektantów
Methodologies of building operational zones and accuracy zones of navigation systems : forgotten designers’ tools
Autorzy:
Czaplewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/310009.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
systemy nawigacyjne
nawigacja
transport morski
navigation systems
navigation
sea transport
Opis:
W artykule przedstawiono metodyki budowy stref działania i stref dokładności dwuelementowych azymutalnych, stadiometrycznych i trójelementowych hiperbolicznych systemów nawigacyjnych. Przedstawiono metodyki jako narzędzie wspomagające proces projektowania nowych i modernizacji istniejących systemów wykorzystywanych w procesie zapewnienia bezpiecznej nawigacji w transporcie morskim.
The paper presented methodologies of building coverage zones and accuracy zones for two-elements azimuthal and stadiometric navigation systems and there-elements hyperbolical navigation systems. The methodologies are support tools for creating new and modernization exists navigation systems. Navigation systems are essential in ensuring safe navigation in sea transport.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 71-77, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EGNOS - accuracy performance in Poland
Autorzy:
Mięsikowski, M.
Nowak, A.
Oszczak, B.
Specht, C.
Powiązania:
https://bibliotekanauki.pl/articles/320885.pdf
Data publikacji:
2006
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
dokładność systemów nawigacyjnych
EGNOS
accuracy of navigation systems
Opis:
EGNOS - the first European satellite navigation system is a join project of the European Space Agency, Eurocontrol, European Commission and represents the fist step to towards Galileo - autonomous navigation satellite system of the 2nd generation (GNSS-2). The system Operational Readiness Review (ORR), took place in June 2005 and resumed of more than eight years of studies, works, leaded by ESA and an industrial consortium with Alcatel Space as the Prime Contractor. The Initial Operations Phase has therefore started in July 2005 as an effect of successful negotiations between ESA and European Satellite Services Provider. During the last years many different test, trials and measurement campaigns have been done in positioning, navigation, time services and other application for improving different characteristics of EGNOS [4, 5]. Some of them were also realised in Poland [1, 2] and observed accuracy confirm high system performances. Poland is at the edge of the system coverage then the system disturbances could be more probable than in the central part of the Europe. Presented paper reports final results of the, long-term static measuring campaigns, which were done before the EGNOS System Test Bed (ESTB) ending. Two-week accuracy analyses were done and the position error statistic distributions of system were also compared with the classical DGPS based on LF/MF reference station.
Źródło:
Annual of Navigation; 2006, 11; 63-72
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
Tytuł:
Określenie korekcji jonosferycznych EGNOS w eksperymencie lotniczym Dęblin (01.06.2010)
Designation the EGNOS ionospheric corrections in flight test in Dęblin (01.06.2010)
Autorzy:
Krasuski, K.
Jafernik, H.
Powiązania:
https://bibliotekanauki.pl/articles/316967.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
dokładność systemów nawigacyjnych
EGNOS
GPS
accuracy of navigation systems
Opis:
W artykule przedstawiono możliwości określenia opóźnienia jonosferycznego w programie SBAS MeNTOR 1.15. Wartość opóźnienia jonosferycznego została przedstawiona za pomocą parametrów VTEC oraz GIVE. Wartości parametrów VTEC i GIVE zostały określone na podstawie danych korekcyjnych od satelity EGNOS S120. Eksperyment badawczy został przeprowadzony na potrzeby implementacji techniki satelitarnej GNSS w nawigacji lotniczej.
Paper presents the possibility of designation the ionosphere delay in SBAS MeNTOR 1.15 software. The value of ionosphere delay was presented using VTEC and GIVE parameters. The values of VTEC and GIVE parameters were designated based on data corrections from EGNOS S120 satellite. The research test was conducted for purpose of implementation the GNSS satellite technique in air navigation.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 822-825, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Availability, reliability and continuity model of differential GPS transmission
Autorzy:
Specht, C.
Powiązania:
https://bibliotekanauki.pl/articles/320585.pdf
Data publikacji:
2003
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
nawigacja satelitarna
satelitarne systemy nawigacyjne
GPS
satellite navigation systems
Opis:
[from "Introduction"] The dissertation is divided into four chapters: Chapter I. "Terminological synthesis of concepts: availability, reliability and continuity in literature on navigation" - covers the study of literature in the field of navigation with regard to the three concepts discussed. They will be characterized with respect to both their nature, and methods of determination navigational purposes. As a result of the analysis, drawn will be conclusions related to the existing differences in perception of the terms, narrowing down of their meaning in navigation, as well as constraints of the models recommended. Chapter II. "General model of the availability, reliability and continuity" - here the definition of navigational structure will be constructed. This definition is indispensable for the process of system modeling. The mathematical model of alternative process with restoration will be worked out, based on the mathematical description of navigational systems’ states. As a result, mathematical relations of availability, reliability and continuity will be formulated, describing them on a general level. The same model will enable the transposition to time-related formulas, typical of a number navigation processes, i.e. processes - where distributions of lifetimes and times of failures are expressed by exponential equations. Chapter III. "Classical differential GPS systems"- the main thesis will be considered here and include structural models of differential DGPS transmission, providing, in this way, for making a separate individual navigational structure - differential GPS transmission. Consequently, models and measures of reliability, availability and continuity will be proposed for transmission of the RTCM messages (type 1 or 9-3) commonly used in navigation. Chapter IV. "Differential GPS system network" - presents the validation method of DGPS systems in the areas where multiple coverage of several radiobeacons and reference stations exists. An analogous method of modelling as in the classic systems is proposed. A general validation of transmission methods for differential GPS will also be proposed in this chapter. The issues considered in this dissertation, will exemplify a group of single element models - GPS telemetric transmission - within the complex structure of differential GPS. We can assume that a new scientific area will be opened for future deliberations in the fields related to: 1. Optimisation of decision making process when deploying maritime reference stations (DGPS) or land based (permanent GPS/RTK), taking into account: user reliability features, minimum requirements for the basin (area), maximization of task effectiveness and many others. 2. Advantages of multistation system nets in the aspect of position accuracy and operation reliability, also other typical features influencing exploitation. The mathematical model proposed in this dissertation, fills the gap concerning methodology used to determine the magnitude of reliability, continuity and transmission availability in differential GPS systems on surveying level. Thus, more effective way of use in navigation has been provided. General and particular theory introduced to describe navigation systems by means of reliability characteristics enables theoretical considerations over individual elements and easy integration into more complex structures.
Źródło:
Annual of Navigation; 2003, 5; 1-84
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 115

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