Temat: open sea area - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Trajektoria ruchu statku w procesie bezpiecznego prowadzenia statku po akwenie otwartym
Ship movement trajectory in safe ship navigation in the open sea area
Autorzy:: Pietrzykowski, Z.
Mielniczu, S.
Hatłas, P.
Powiązania:: https://bibliotekanauki.pl/articles/250046.pdf
Data publikacji:: 2015
Wydawca:: Instytut Naukowo-Wydawniczy TTS
Tematy:: statek
akwen otwarty
trajektoria
kolizja
ship
open sea area
trajectory
collision
Opis:: Jednym z podstawowych zadań nawigacji jest zapewnienie bezpiecznej żeglugi poprzez unikanie niebezpieczeństw w trakcie realizacji podróży morskiej. Dotyczy to m.in. zaplanowania i wykonania manewru antykolizyjnego: wyznaczenia bezpiecznej trajektorii ruchu statku oraz sterowania po niej. Stąd, przy planowaniu trajektorii ruchu należy uwzględnić aktualną sytuację nawigacyjną, kryteria bezpieczeństwa, charakterystyki manewrowe statku oraz panujące warunki hydrologiczno-meteorologiczne. Ze względu na dynamikę procesów ruchu, zmieniające się warunki oraz ograniczenia czasowe dla wypracowania decyzji i jej realizacji, jest to zadanie złożone. W artykule zdefiniowano wymienione zadanie oraz przedstawiono model procesu wyznaczania trajektorii ruchu statku w sytuacji kolizyjnej z uwzględnieniem modelu środowiska. Opracowany na tej podstawie system może stanowić jeden z modułów rozwijanych obecnie nawigacyjnych systemów wspomagania decyzji na statku morskim.
One of the basic navigational tasks is to provide safe navigation by avoiding dangerous situations during the ship voyage. This includes, inter alia, planning and execution of anticollision manoeuvres: a safe ship trajectory determination and ship movement control. Therefore, when planning the ship trajectory, the navigator should take into account several elements: cur-rent navigational situation, safety criteria, ship's manoeuvrability and hydro-meteorological conditions. This task is complex due to the dynamics of traffic processes, changing conditions, time-limits for reaching a decision and its implementation. The authors formulate the mentioned task and present the process model for ship trajectory determination in collision situations, taking into account the ship environment model. The system developed on this basis can be incorporated as a module of navigation decision support systems for sea going ships.
Źródło:: TTS Technika Transportu Szynowego; 2015, 12; 1214-1219, CD
1232-3829
2543-5728
Pojawia się w:: TTS Technika Transportu Szynowego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Ship domain in open sea areas and restricted waters: an analysis of influence of the available maneuvering area
Autorzy:: Wielgosz, M.
Powiązania:: https://bibliotekanauki.pl/articles/117213.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: ship domain
open sea areas
restricted waters
available maneuvering area
Electronic Chart Display and Information System (ECDIS)
navigational safety assessment
safety at sea
simulation method
Opis:: A ship domain is nowadays an important navigational safety assessment criterion. Its shape and size depend on many factors. The available maneuvering area seems to be one of the most important of them. This article examines the influence of the available manoeuvring area on the shape and size of ship domain in the open sea and restricted waters. The research was conducted using a simulation method. Expert navigators participated in simulations using the ECDIS system. The domains of ship passages in open sea area and restricted area have been compared.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 99-104
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Improvement of MERIS level 2 products in Baltic Sea coastal areas by applying the Improved Contrast between Ocean and Land processor (ICOL) - data analysis and validation
Autorzy:: Kratzer, S.
Vinterhav, C.
Powiązania:: https://bibliotekanauki.pl/articles/48296.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: MERIS standard processor
FUB processor
C2E process
Baltic Sea
coastal area
data analysis
validation
spectral reflectance
open sea
remote sensing
water quality
atmosphere
water body
total suspended matter
suspended particulate matter
organic matter
Opis:: In this paper we compare the following MERIS processors against sea-truthing data: the standard MERIS processor (MEGS 7.4.1), the Case 2 Regional processor (C2R) of the German Institute for Coastal Research (GKSS), and the Case 2Water Properties processor developed at the Freie Universit¨at Berlin (FUB). Furthermore, the Improved Contrast between Ocean and Land processor (ICOL), a prototype processor for the correction of adjacency effects from land, was tested on all three processors, and the retrieval of level 2 data was evaluated against sea-truthing data before and after ICOL processing. The results show that by using ICOL the retrieval of spectral reflectance in the open sea was improved for all processors. After ICOL processing, the FUB showed rather small errors in the blue, but underestimated in the red −34% Mean Normalised Bias (MNB) and 37% Root Mean Square (RMS). For MEGS the reflectance in the red was underestimated by about −20% MNB and 23% RMS, whereas the reflectance in the other channels was well predicted, even without any ICOL processing. The C2R underestimated the red with about −27% MNB and 29% RMS and at 412 nm it overestimated the reflectance with about 23% MNB and 29% RMS. At the outer open sea stations ICOL processing did not have a strong effect: the effect of the processor diminishes progressively up to 30 km from land. At the open sea stations the ICOL processor improved chlorophyll retrieval using MEGS from −74% to about 34% MNB, and TSM retrieval from −63% to about 22% MNB. Using FUB in combination with ICOL gave even better results for both chlorophyll (25% MNB and 45% RMS) and TSM (−4% MNB and 36% RMS) in the open Baltic Sea. All three processors predicted TSM rather well, but the standard processor gave the best results (−12% MNB and 17% RMS). The C2R had a very low MNB for TSM (1%), but a rather high RMS (54%). The FUB was intermediate with −16% MNB and 31% RMS. In coastal waters, the spectral diffuse attenuation coefficient Kd(490) was well predicted using FUB or MEGS in combination with ICOL (MNB about 12% for FUB and 0.4% for MEGS). Chlorophyll was rather well predicted in the open Baltic Sea using FUB with ICOL (MNB 25%) and even without ICOL processing (MNB about 15%). ICOL-processed MEGS data also gave rather good retrieval of chlorophyll in the coastal areas (MNB of 19% and RMS of 28%). In the open Baltic Sea chlorophyll retrieval gave a MNB of 34% and RMS of 70%, which may be due to the considerable patchiness caused by cyanobacterial blooms. The results presented here indicate that with the MERIS mission, ESA and co- workers are in the process of solving some of the main issues regarding the remote sensing of coastal waters: spatial resolution; land-water adjacency effects; improved level 2 product retrieval in the Baltic Sea, i.e. the retrieval of spectral reflectance and of the water quality products TSM and chlorophyll.
Źródło:: Oceanologia; 2010, 52, 2; 211-236
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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