Wyniki wyszukiwania - BazTech

1

Signal research for alternative Baltic Navigation System

Dziewicki M., Młotkowski J., Stupak T.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2020

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Vol. 14. no. 4

799--802

EN

In the project R-Mode a navigation system for Baltic Sea is designed. In the range of these actions in summer of 2020 the signal for DGPS base station Rozewie were adopted and measurements on the sea were performer. This experiment is shown in the article.

2

On analysis of LitPOS stations time series and velocities

Puškorius V., Paršeliūnas E., Baniulis R., Galinauskas K., Valotka S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2020

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Vol. 14, no. 2

459--463

EN

LitPOS (Lithuanian Positioning System), the network of continuously operating GNSS (Global Navigation Satellite System) stations, became operational in July 2007. It provides data both for real-time and post-processing applications. LitPOS stations cover the whole territory of Lithuania. There are 31 of LitPOS GNSS stations in total network. Also LitPOS network includes 3 ASGEUPOS (Poland) and 6 LATPOS (Latvia) stations. LitPOS network data processing and analysis of station’s velocities was done using Bernese 5.2, TSview and CATREF programs. Results of analysis show that North/East velocities of the LitPOS stations are very homogeneous what leads to the conclusion that there are no any significant horizontal deformations of Earth’s crust in the territory of Lithuania. Up components of LitPOS stations velocities fit very well to vertical movements of Earth’s crust as described by the land uplift models of Fennoscandia.

3

Analiza działania Morskiej Stacji Referencyjnej w Świnoujściu jako podstawa do stworzenia morskich systemów IDS (Instrument Docking System)

Pietraszkiewicz J., Tycholiz W.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2018

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nr 107

84--98

PL

W artykule opisano fazy podchodzenia statku do portu ze szczególnym uwzględnieniem problemu wyznaczania pozycji jednostki z dużą dokładnością w czasie rzeczywistym. W tym aspekcie przeprowadzona została analiza systemów pozycjonowania, ich dokładności, dostępności, niezawodności oraz zasięgu działania. W artykule przedstawiono wyniki badań obserwacji dokładności systemu pozycjonowania w Świnoujściu, przeprowadzonych przez zespół NavSim Polska Sp. z o.o. Podkreślając wykorzystanie techniki RTK (Real Time Kinematic), przeprowadzono analizę działania Morskiej Stacji Referencyjnej (MSR) w Świnoujściu. Artykuł prezentuje możliwe praktyczne wykorzystanie technologii GNSS RTK (Global Navigation Satellite Systems) do budowy systemów elektronicznego zobrazowania rzeczywistej sytuacji nawigacyjnej dużej jednostki oraz wdrożenia na wzór systemów lotniczych ILS (Instrument Landing System) lub GBAS (Ground Based Augmentation System) morskich systemów IDS (Instrument Docking System). Przedstawione wnioski uzasadniają przydatność MSR w Świnoujściu oraz stosowanie podobnych systemów w celu zwiększenia bezpieczeństwa podczas wprowadzania statków do portu.

EN

Navigating large vessels in the confined waters (coastal/approach and harbour) is everything but trivial. Due to heavy vessel traffic, vicinity of navigational hazards, limited water depth, rapidly changing navigational circumstances, and tremendous weight of the vessels, navigating, mooring and docking activities are demanding and stressful for the pilots. Stress usually leads to increased tiredness, risk of human error and thus to a larger number of incidents and accidents. Marine pilots are more tired and less effective. In the temperate zones there is an additional factor to be considered: poor visibility. This article presents a practical application of the GNSS RTK technology in the electronic chart and situational awareness system as well as the concept of the Instrument Docking System (IDS) for vessels, which in its purpose and fundamental elements is similar to the Instrument Landing System (ILS) for aircrafts).

4

Long term validation of high precision RTK positioning onboard a ferry vessel using the MGBAS in the Research Port of Rostock

Ziebold R., Gewies S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2017

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Vol. 11, no. 3

433--440

EN

In order to enable port operations, which require an accuracy of about 10cm, the German Aerospace Center (DLR) operates the Maritime Ground Based Augmentation Service (MGBAS) in the Research Port of Rostock. The MGBAS reference station provides GPS dual frequency code + phase correction data, which are continuously transmitted via an ultra-high frequency (UHF) modem. Up to now the validation of the MGBAS was rather limited. Either a second shore based station was used as an artificial user, or measurement campaigns on a vessel with duration of a few hours have been conducted. In order to overcome this, we have installed three separate dual frequency antennas and receivers and a UHF modem on the Stena Line ferry vessel Mecklenburg-Vorpommern which is plying between Rostock and Trelleborg. This paper concentrates on the analysis of the highly accurate phase based positioning with a Real Time Kinematic (RTK) algorithm, using correction data received by the UHF modem onboard the vessel. We analyzed the availability and accuracy of RTK fix solutions for several days, whenever the ferry vessel was inside the service area of the MGBAS.