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    Tytuł:
    Vehicle Positioning System Based on GPS and Autonomic Sensors
    Autorzy:
    Konatowski, S.
    Dąbrowski, M.
    Pieniężny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/320803.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    GPS
    integration
    inertial navigation
    Opis:
    In many real situations like in tunnels, forests and in urban canyons GPS position calculation became impossible or not accurate enough. The solution of the problem is to integrate Global Positioning System with Inertial Navigation System. In such a solution it is possible to determine object position with temporary disappearance of GPS signals and improve precision. The paper presents an idea of data integration from two navigation sensors (subsystems). The aim of such an approach is to improve estimation precision of vehicle position and ensure autonomy of the system. System consists of two positioning subsystems: Dead Reckoning (DR) and Global Positioning System. Sensors fusion is realize by 32-bit microprocessor with ARM architecture and interfaces circuits. DR/GPS algorithm was implemented in 32-bit microprocessor with ARM SAM7S core.
    Źródło:
    Annual of Navigation; 2010, 16; 67-74
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Navigation an Aircraft by means of a Position potential in three dimensional space
    Autorzy:
    Grzegorzewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/320613.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    nawigacja lotnicza
    GPS
    pozycjonowanie
    air navigation
    positioning
    Opis:
    The main thesis: We assume that the unavailability of GPS information in certain time intervals will be compensated by the implementation of the mathematical model, which will process the aircraft co-ordinates on the basis of the last received position. The study has been divided into four chapters aiming at and presenting the solutions of the above mentioned research problems: Chapter 1 - "Review of the Literature". The analysis also concerned mathematical models designed to supplement GPS satellite navigation system. Chapter 2, "En-route Flights - Aircraft Position Accuracy Assessment", comprises the analysis of author's flight experiments, carried out between 1999 and 2003. Chapter 3, "Approach and Landing Phase - Aircraft Position Accuracy Assessment", tackles the problem of aircraft landing accuracy in flight experiments, which compared the accuracy of landings using the Air Traffic Control Radar Landing System (RALS) with GPS-assisted landings. Chapter 4, "Navigating By Means of a Navigation Potential In Space", proposes a new solution being a development of Vanicek's theory [Benlin Xu, Vanicek P. 2000] by expanding it into the third dimension. The presented mathematical model fills the gap in determining aircraft position in the instance of the lack of navigation information. Knowing the position is of vital importance on the glide path, when the accident risk is very high in adverse weather conditions.
    Źródło:
    Annual of Navigation; 2005, 9; 111-111
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability test of a GNSS onboard receiver in the kinematic mode
    Autorzy:
    Ćwiklak, Janusz
    Krasuski, Kamil
    Grzegorzewski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/320769.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    GPS
    EGNOS
    RMS
    air navigation
    linear regression
    Opis:
    The article presents the results of the aircraft Cessna 172 positioning based on navigation solutions in the GPS and EGNOS (SBAS) tracking mode. The article makes a comparison of coordinate readings of the Cessna 172 in the ellipsoidal BLh frame. The verification of the coordinates of the aircraft Cessna 172 was used to assess the reliability of the GNSS satellite technique in aviation. In a research test, the navigation data were recorded by the onboard receiver Thales Mobile Mapper during an air test performed over the military aerodrome EPDE in Dęblin. Judging by the conducted investigations, it is possible to conclude that the difference in BLh coordinates of the aircraft Cessna 172 on the basis of the GPS solution and EGNOS (SBAS) solution equals, respectively: from -0.5 m to +3 m for component B; and from -2 m to +6 m for component L; from approximately -11 m to over +1 m for component h. In addition, the paper defines factors of dilution of precision PDOP, based on the GPS and EGNOS (SBAS) solutions. The average value of the PDOP coefficient for a solution in the tracking GPS mode was 2.7, whereas in the EGNOS (SBAS) tracking mode, it was equal to 2.8.
    Źródło:
    Annual of Navigation; 2019, 26; 106-113
    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:
    Application of IGS Products for Air Navigation
    Autorzy:
    Jafernik, H.
    Ćwiklak, J.
    Krasuski, K.
    Kozubal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/320524.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    GPS
    IGS
    SPP method
    positioning accuracy
    air navigation
    Opis:
    Single Point Positioning (SPP) method is widely used in air, marine, and land navigation to determine the user’s position in real time and post factum. A typical accuracy for this method of determining the user’s position in the static mode is approximately 10 meters. In air operations, the SPP method accuracy can be several times lower and that may cause problems with precise positioning of an aircraft. The authors of this article presented preliminary results of research concerning aircraft positioning in the kinematic mode based on GPS observations. For this purpose, an in-flight experiment, in which a Cessna 172 aircraft was used, was performed at the airport in Mielec, Poland. The aircraft was equipped with a dual-frequency Topcon TPS HiperPro receiver, which was recording satellite observations with 1-second interval. The aircraft position was determined using the least-squares method (LSM) in the RTKLIB (RTKPOST module) software. Two research tests were performed within the scope of the experiment, i.e. in test I the aircraft position was determined on the basis of raw GPS observations and the broadcast ephemeris data whereas in test II precision products of the IGS were used, such as: precise ephemeris SP3, DCB hardware delay, clock bias data of GPS satellites and receivers in the CLK format, data of the ionosphere maps based on IONEX format, and phase center calibration of GPS satellites and receivers in the ANTEX format. The use of the IGS precision products improved the accuracy of the X coordinate to 1 m, Y to 0.7 m and Z to 1.3 m. On the basis of tests I and II, an additional RMS-3D parameter was determined, whose mean value was 4 m.
    Metoda pozycjonowania w czasie rzeczywistym, nazywana Single Point Positioning, jest powszechnie stosowana w nawigacji lotniczej, morskiej, a także lądowej do określania pozycji użytkownika w czasie rzeczywistym, niekiedy również post-processing. Zwykle dokładność metody w przypadku użytkownika, który nie przemieszcza się, oceniana jest na około 10 metrów. W operacjach lotniczych jej dokładność bywa wielokrotnie niższa, co często stwarza problemy. Autorzy artykułu przedstawiają wstępne wyniki badań odnośnie dokładności pozycjonowania samolotu w wariancie dynamicznym z wykorzystaniem systemu GPS. W tym celu na lotnisku Mielec przeprowadzono eksperyment w locie z użyciem samolotu Cessna 172, który wyposażono w dwuczęstotliwościowy odbiornik Topcon TPS HiperPro rejestrujący obserwacje co sekundę. Jako pozycje referencyjne przyjęto pozycje obliczane metodą najmniejszych kwadratów programem RTKLIB (moduł RTKPOST). W ramach opisywanego eksperymentu przeprowadzono dwa testy - w pierwszym określano pozycje z użyciem surowych pomiarów GPS oraz efemeryd pokładowych, w drugim użyto efemeryd oferowanych przez IGS. Były to takie dane, jak efemerydy precyzyjne SP3, poprawki zegarów satelitów w formacie CLK, mapy jonosfery w formacie IONEX oraz dane odnośnie centrum fazowego anten w formacie ANTEX. Użycie produktów oferowanych przez IGS znacząco poprawiło dokładność wyznaczeń, przy czym współrzędna X została wyznaczona z dokładnością 1 m, współrzędna Y - 0,7 m, natomiast Z - 1,3 m. Dodatkowo wyznaczono średni błąd pozycji w przestrzeni 3D, którego wartość wyniosła około 4 m.
    Źródło:
    Annual of Navigation; 2017, 24; 285-300
    1640-8632
    Pojawia się w:
    Annual of Navigation
    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
    Tytuł:
    Desing and simulative testing of DR/GPS system
    Autorzy:
    Kaniewski, P.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/320843.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    satelitarne systemy nawigacyjne
    nawigacja satelitarna
    GPS
    satellite navigation systems
    Opis:
    The article presents a project and simulation results of an integrated positioning system DR/GPS. Firstly, a choice of devices for the positioning system is discussed. Secondly, a concept of integration of a dead reckoning (DR) module with a GPS receiver is described. The system processes data from an odometer, a gyro, an electronic compass, which constitute the DR unit, and from a GPS receiver with use of two complementary Kalman filters. Next, state-space model of the system and Kalman filters are shortly presented. After that, the authors outline an adopted methodology of simulative testing of DR/GPS integrated system. Chosen simulation results are included in the paper. The presented integrated positioning system may find its application as a component of an in-car navigation system or, following several alterations, also as an onboard system of other types of land vehicles.
    Źródło:
    Annual of Navigation; 2000, 2; 57-68
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examination of EGNOS Safety-of-Live service in Eastern Slovakia
    Autorzy:
    Ciećko, A.
    Grzegorzewski, M.
    Oszczak, S.
    Ćwiklak, J.
    Grunwald, G.
    Balint, J.
    Szabo, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/320579.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    GNSS
    GPS
    SBAS
    EGNOS
    Safety-of-Life
    satellite navigation
    Opis:
    The first PBN approach procedures in Slovakia became operationally effective at Bratislava and Košice airports as of 5 February 2015. The article presents the results of EGNOS Safety-of-Life Service preliminary examination in eastern Slovakia, just before official introduction of these procedures. The practical examination includes static test and test flight made with Cessna plane taking off at the airport in Bidovce — LZBD (just 16 km from international airport in Košice) and passing a route along eastern border of Slovakia. In this region the performance of EGNOS could be unsatisfactory due to lack of RIMS stations to the east from there. The experiment was performed on October 13, 2014 in cooperation of the Air Force Academy in Deblin, the Department of Aviation of Technical University in Košice and University of Warmia and Mazury in Olsztyn.
    Pierwsze procedury podejścia do lądowania typu PBN (Performance-Based Navigation) na Słowacji zostały wdrożone na lotniskach w Bratysławie i Koszycach 5 lutego 2015 r. W artykule przedstawiono wyniki wstępnych analiz serwisu Safety-of-Life systemu EGNOS we wschodniej Słowacji, tuż przed oficjalnym wprowadzeniem tych procedur. Badania praktyczne obejmują test statyczny oraz lot testowy wykonany samolotem Cessna z lotniska Bidovce-LZBD (oddalonego zaledwie 16 km od międzynarodowego lotniska w Koszycach) po trasie wzdłuż wschodniej granicy Słowacji. W tym regionie jakość systemu EGNOS może być niezadowalająca z powodu braku stacji monitorujących RIMS na wschód od tego miejsca. Eksperyment przeprowadzono 13 października 2014 r. we współpracy Wyższej Szkoły Oficerskiej Sił Powietrznych w Dęblinie, Wydziału Lotnictwa Politechniki w Koszycach oraz Uniwersytetu Warmińsko-Mazurskiego w Olsztynie.
    Źródło:
    Annual of Navigation; 2015, 22; 65-78
    1640-8632
    Pojawia się w:
    Annual of Navigation
    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:
    Positioning with AHRS/ODOMETER/GPS system
    Autorzy:
    Kaniewski, P.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/320948.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    nawigacja satelitarna
    system pozycjonujący
    GPS
    nawigacja zliczeniowa
    filtracja
    satellite navigation systems
    positioning system
    dead reckoning
    filtering
    Opis:
    The paper presents a project of an integrated positioning system composed of a dead reckoning unit (DR), and a GPS receiver. The DR subsystem includes an Attitude and Heading Reference System (AHRS) and an odometer. The data from DR and GPS are jointly processed via an algorithm of linearized complementary Kalman filter. The paper shortly introduces an idea of relative and absolute navigation. Next, it presents state-space description of the AHRS/ODOMETER/GPS integrated system. a functional structure of the system and Kalman filtering algorithm are presented. At last, the authors outline an adopted methodology of testing of AHRS/ODOMETER/GPS integrated system. Chosen results of the tests, conducted with use of real navigation data, are included in the paper. The presented positioning system may find its application in land vehicles.
    Źródło:
    Annual of Navigation; 2001, 3; 75-89
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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