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PL
W artykule zawarto krótki opis systemu GPS (Global Positioning System) w odmianie różnicowej, aktualnie funkcjonujący na terenie Zatoki Pomorskiej. Podano także przykład modernizacji i rozbudowy systemu na omawianym akwenie na potrzeby największych gazowców LNG, mających wkrótce zawijać do Terminalu Gazowego LNG w Świnoujściu.
EN
Short description of GPS (Global Positioning System) and its differential mode is presented in this article. Proposal of modernization and some changes to the system construction itself are also included in this paper in accordance to LNG gas tankers needs and requirements which will enter Świnoujście LNG Terminal in nearest future.
2
Content available remote Long range RTK
EN
Precise RTK positioning is usually performable only on short length bases, to limit distance correlated biases, as atmosphere and ephemerides. However, it is possible to recover some differential biases also over long distance using appropriate models, improving the performances of long base RTK positioning up to 100 km base length, with the goal of studying some preliminary problems in multi reference station positioning. The observation model is defined for double or single frequency GPS signal, and the system state vector is evaluated via Kalman filtering. On the reference station side, one way bias estimation is possible but not strictly necessary. On the rover side, corrections are applied to the observations as single differences, then the model estimates and recovers the undifferentiated residual biases. We have performed static and kinematic tests over long bases, using short bases as performance control.
3
Content available remote Application of RTK system to investigate Ship`s maneuverability
EN
This paper presents results of the test performed on the reservoir (Zalew Zegrzyński) near Warsaw. The three-dimensional boat trajectory using three RTK receivers was calculated. The experiment allowed to determine the influence of the free oscillations on course keeping stability factor of the boat. This experiment is a part of the research on testing maneuverability of the warship. It concerns the determination of a new and much more widely maneuvering trials-range (expanded beyond the resolution`s A.601/15/ requirements) for naval and special ships being the tasks function of these ships.
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