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Wyszukujesz frazę "Malinowski, J. J." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
A comparative study of Precise Point Positioning (PPP) accuracy using online services
Autorzy:
Malinowski, M.
Kwiecień, J.
Powiązania:
https://bibliotekanauki.pl/articles/106719.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Precise Point Positioning
PPP
GPS
APPS
CSRS-PPP
GAPS
magicGNSS
System Precyzyjnego Pozycjonowania
Opis:
Precise Point Positioning (PPP) is a technique used to determine the position of receiver antenna without communication with the reference station. It may be an alternative solution to differential measurements, where maintaining a connection with a single RTK station or a regional network of reference stations RTN is necessary. This situation is especially common in areas with poorly developed infrastructure of ground stations. A lot of research conducted so far on the use of the PPP technique has been concerned about the development of entire day observation sessions. However, this paper presents the results of a comparative analysis of accuracy of absolute determination of position from observations which last between 1 to 7 hours with the use of four permanent services which execute calculations with PPP technique such as: Automatic Precise Positioning Service (APPS), Canadian Spatial Reference System Precise Point Positioning (CSRS-PPP), GNSS Analysis and Positioning Software (GAPS) and magicPPP - Precise Point Positioning Solution (magicGNSS). On the basis of acquired results of measurements, it can be concluded that at least two-hour long measurements allow acquiring an absolute position with an accuracy of 2-4 cm. An evaluation of the impact on the accuracy of simultaneous positioning of three points test network on the change of the horizontal distance and the relative height difference between measured triangle vertices was also conducted. Distances and relative height differences between points of the triangular test network measured with a laser station Leica TDRA6000 were adopted as references. The analyses of results show that at least two hours long measurement sessions can be used to determine the horizontal distance or the difference in height with an accuracy of 1-2 cm. Rapid products employed in calculations conducted with PPP technique reached the accuracy of determining coordinates on a close level as in elaborations which employ Final products.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 102; 15-31
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the effectiveness of different Kalman filtering methods and smoothers in object tracking based on simulation tests
Autorzy:
Malinowski, M.
Kwiecień, J.
Powiązania:
https://bibliotekanauki.pl/articles/106773.pdf
Data publikacji:
2014
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Kalman filtering
smoother
extended Kalman filter
derivative-free filtering
Central Difference Kalman Filter
unscented Kalman filter
object tracing
filtr Kalmana
filtracja
rozszerzony filtr Kalmana
EKF
bezśladowy filtr Kalmana
UKF
śledzenie obiektu
Opis:
In navigation practice, there are various navigational architecture and integration strategies of measuring instruments that affect the choice of the Kalman filtering algorithm. The analysis of different methods of Kalman filtration and associated smoothers applied in object tracing was made on the grounds of simulation tests of algorithms designed and presented in this paper. EKF (Extended Kalman Filter) filter based on approximation with (jacobians) partial derivations and derivative-free filters like UKF (Unscented Kalman Filter) and CDKF (Central Difference Kalman Filter) were implemented in comparison. For each method of filtration, appropriate smoothers EKS (Extended Kalman Smoother), UKS (Unscented Kalman Smoother) and CDKS (Central Difference Kalman Smoother) were presented as well. Algorithms performance is discussed on the theoretical base and simulation results of two cases are presented.
Źródło:
Reports on Geodesy and Geoinformatics; 2014, 97; 1-22
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ATR Track III: the real-time GPS for public security
Autorzy:
Kwiecień, J.
Malinowski, M.
Bujnowski, S.
Bujarkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/225848.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
czas rzeczywisty
GPS projekt
bezpieczeństwo publiczne
real-time
GPS project
public security
Opis:
In the project a system was developed, that visualizes real time GPS navigation data over the public security system. Vehicles equipped with GPS/GSM unit can connect to the city security system (tel. 112) via Internet and multiple viewer users can track their motion in real-time. A client-server system passes GPS position data from the vehicles on the GIS editor and vector/raster MultiViewer application.
Źródło:
Reports on Geodesy; 2006, z. 2/77; 179-185
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of Hans Glacier movement dynamics (Hornsund Sw Spitsbergen, Svalbard)
Autorzy:
Walo, J.
Puczko, D.
Adamek, A.
Węzka, K.
Malinowski, Z.
Rajner, M.
Powiązania:
https://bibliotekanauki.pl/articles/224448.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
ablacja
chłodzenie ablacyjne
Spitsbergen
ruch lodowca
lodowiec
stacja polarna
ablation
movement of glacier
Hans Glacier
glacier
polar station
Opis:
Fast and exact GPS measurements are independent from weather and season of the year. For achieving reliable results, survey should be conducted at least once a month and at least twice a month in summer season (June-September). GPS RTK is suggested for pole movement determination. In case of real-time corrections limited availability (i.e. screening by mountains) using Rapid Static is a good choice. To minimize multipath error antenna should be placed at least 0,5m eccentric to pole and at 1 m height. Ablation pole movement vectors of Hans glacier indicate few relations. Most important feature is speed being about 10 times greater in foremost zone of glacier than in lateral parties of glacier. Measurements of lateral profile indicate that, accordingly to expectations, surface speed of glacier is greater in middle axis comparing to the edges or glacier.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 173-179
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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