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    Wyświetlanie 1-7 z 7
    Tytuł:
    Meteorological satellites since 40 years in IMWM service
    Autorzy:
    Struzik, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/703199.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    satellite remote sensing
    meteorological satellite system
    meteorology
    hydrology
    Opis:
    The history of satellite remote sensing applications in IMWM was presented, referring to history of remote sensing and also development and actual state of meteorological satellite system. Main areas of applications were presented together with examples of products generated from satellite data operationally received in IMWM since 40 years. The problem of data resolution from meteorological satellites fulfilling requirements of meteorology were presented on examples of processes for which were designed. Dynamical development of meteorological satellites in recent years were presented focusing on METEOSAT Second Generation and METOP satellites.
    Źródło:
    Nauka; 2008, 4
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Flight Path Deviations for SAR Radar Installed on UAV
    Autorzy:
    Łabowski, M.
    Kaniewski, P.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/221533.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Unmanned Aerial Vehicle
    Synthetic Aperture Radar
    inertial measurement unit
    Global Navigation Satellite System
    Opis:
    The paper presents a method of calculation of position deviations from a theoretical, nominally rectilinear trajectory for a SAR imaging system installed on board of UAV. The UAV on-board system consists of a radar sensor, an antenna system, a SAR processor and a navigation system. The main task of the navigation part is to determine the vector of differences between the theoretical and the measured trajectories of UAV center of gravity. The paper includes chosen results of experiments obtained during ground and flight tests.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 3; 383-391
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of UAV Position with Use of Smoothing Algorithms
    Autorzy:
    Kaniewski, P.
    Gil, R.
    Konatowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/221380.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Unmanned Aerial Vehicle
    Inertial Navigation System
    Global Navigation Satellite System
    Integrated Navigation System
    Synthetic Aperture Radar
    Kalman Filter
    smoothing algorithm
    Opis:
    The paper presents methods of on-line and off-line estimation of UAV position on the basis of measurements from its integrated navigation system. The navigation system installed on board UAV contains an INS and a GNSS receiver. The UAV position, as well as its velocity and orientation are estimated with the use of smoothing algorithms. For off-line estimation, a fixed-interval smoothing algorithm has been applied. On-line estimation has been accomplished with the use of a fixed-lag smoothing algorithm. The paper includes chosen results of simulations demonstrating improvements of accuracy of UAV position estimation with the use of smoothing algorithms in comparison with the use of a Kalman filter.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 1; 127-142
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New threat to global transport. GNSS receiver spoofing
    Autorzy:
    Gucma, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/224112.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GNSS Receiver
    Global Navigation Satellite System
    signal spoofing
    anti-spoofing technique
    global transport
    threats
    GNSS
    komunikacja globalna
    zagrożenia
    Opis:
    Transport and logistics in XXI century relies on the several technical systems for assuring safe and reliable operations. One of widely used systems are satellite positioning systems, used to monitoring transport means and cargo itself. Reliability of the whole transport chain is often combined with singular reliability of satellite monitoring system. Possible threats to precise positioning of any vehicle is GNSS (Global Navigation Satellite System) deliberate interference. So called spoofing interference can mislead receiver in transport objective for reporting entirely wrong position and timing. To fight with this phenomena’s antispoofing techniques are developed. This paper will provide a review of late researches in field of GNSS anti-spoofing on the side of receiver. GNSS receiver vulnerabilities for a spoofer (device) attack will be presented as well as anti-spoofing algorithms. Possible limitation, costs as well as countermeasures methods will be shown thoroughly. Some of recent trends in anti-spoofing techniques in the world will be outlined up to date.
    Źródło:
    Archives of Transport; 2015, 35, 3; 7-14
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of global navigation satellite system and hydroacoustic techniques to safety of inland water navigation
    Zastosowanie globalnych nawigacyjnych systemów satelitarnych oraz współczesnych technik hydroakustycznych w bezpiecznej nawigacji śródlądowej
    Autorzy:
    Popielarczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/224351.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nawigacja śródlądowa
    systemy satelitarne
    mapy batymetryczne
    bezpieczeństwo żeglugi śródlądowej
    baza śródlądowych przeszkód podwodnych
    Szlak Wielkich Jezior Mazurskich
    global navigation satellite system (GNSS)
    hydrography
    Interactive Inland Underwater Objects Dstabase (IIUOD)
    inland navigation
    Opis:
    The paper presents description of application of integrated, Global Navigation Satellite System (GNSS) and hydroacoustic technologies, for elaboration of actual bathymetric chart and creation of an Inland Interactive Underwater Objects Base (IIUOD). In the paper the description of some integrated bathymetric experiments conducted on Great Mazurian Lakes is presented. A small area of Lake Sniardwy, the largest lake in Poland, has been measured using modern technology with precise satellite positioning and hydrographic techniques. The idea and first results of the implemented base is analyzed and described. The database (IIUOD) is created for visualization of dangerous underwater objects and finally for safety of inland water navigation.
    Artykuł przedstawia zastosowanie zintegrowanych technik satelitarnego pozycjonowania GNSS i systemu hydroakustycznego do opracowania aktualnych map batymetrycznych oraz utworzenia Interaktywnej Bazy Śródlądowych Przeszkód Podwodnych w celu zapewnienia bezpieczeństwa żeglugi na Szlaku Wielkich Jezior Mazurskich. W artykule opisano eksperymentalne prace pomiarowe wykonane na jeziorze Śniardwy z zastosowaniem satelitarnego pozycjonowania DGPS/EGNOS oraz systemu hydrograficznego. Przedstawiono także koncepcję oraz wyniki utworzenia eksperymentalnej bazy geodanych o przeszkodach podwodnych. Opracowana baza IBŚPP umożliwia wizualizację kształtu dna oraz przeszkód. Pomaga poprawić bezpieczeństwo żeglugi śródlądowej i uprawiania sportów wodnych na Wielkich Jeziorach Mazurskich.
    Źródło:
    Archives of Transport; 2011, 23, 2; 191-190
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of satellite techniques in geodesy and navigation in Poland
    Autorzy:
    Baran, Lubomir W.
    Oszczak, Stanisław
    Zieliński, Janusz B.
    Powiązania:
    https://bibliotekanauki.pl/articles/703201.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    geodesy
    reference frame
    Global Positioning System – GPS
    satellite techniques
    satellite navigation
    Galileo navigation system
    Opis:
    Contemporary geodesy is of global dimension. The reference frame is defined as the geocentric system with parameters related to the entire Earth body, e.g. the axis of rotation, and global geoid. The unified time scale is determined for the whole Earth territory as well. International services using different satellite techniques are engaged in the determination of this frame. Particularly important is the Global Positioning System GPS, which is the most important geodetic tool nowadays. In Poland a number of geodetic observatories are working in the frame of the international networks, Polish scientific groups contribute to the advancement of science in this domain. For the practical applications we are using the local networks that again are constructed with satellite techniques. In Europe the regional network EUREF exists while its part EUREF-POL and densification POLREF are in Poland. The modern network ASG-EUPOS is under construction. The GPS technique is used for surveying and navigation and for the positioning in motion, which is in-between the preceding traditional methods. Differential augmentation methods are designed to improve GPS signals such as DGPS and EGNOS. The new European satellite navigation system Galileo is in development. Poland is a member and coowner of this system. A number of Polish research institutions are working on new methods of the practical application of GNSS.
    Źródło:
    Nauka; 2008, 4
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of compound curves adapted to the satellite measurements
    Autorzy:
    Koc, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/223637.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    railway track
    satellite measurements
    geometrical system
    compound curves
    design method
    tor kolejowy
    pomiary satelitarne
    układ geometryczny
    krzywe złożone
    metoda projektowania
    Opis:
    The paper deals with a novelty related to the design of a region for an alternative railway track direction adequate for mobile satellite measurements. The new approach may become particularly useful in the design of the existing track axis control when the determination of both the main track directions becomes impossible. The only solution in that case is to apply to the geometrical system two circular arcs of a different radius, namely, to take advantage of compound curves. In the presented method the design of a new system is carried out by the use of the local system of coordinates. The solution of the design problem is aided by mathematical recording and is based on the determination of some universal equations describing the entire geometrical system. This procedure takes place sequentially involving consecutive parts of the system. The method has been illustrated by an appropriate calculation example.
    Źródło:
    Archives of Transport; 2015, 34, 2; 37-49
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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