Temat: marine radar - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Sets of waveform and mismatched filter pairs for clutter suppression in marine radar application
Autorzy:: Koshevyy, I.V.
Popova, V.
Powiązania:: https://bibliotekanauki.pl/articles/117576.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine radar
marine radar application
clutter suppression
filter optimization
Doppler shift of signal
electronic scanning antenna
radar signals
waveform
Opis:: Sets of waveform and mismatched filter pairs are used. On the contrary with Golays matched waveform filter pair the mismatched waveform filter pair does exist for all N (number pulses in waveform). Using corresponding shapes of filter good Doppler tolerance may be provided. This property together with a good range side-lobs level suppression makes it?s attractable for use in marine radar.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 505-510
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: 2.

Tytuł:: The impact of the offshore wind farm on radar navigation
Autorzy:: Stupak, T.
Wilczyński, P.
Powiązania:: https://bibliotekanauki.pl/articles/24201358.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: safety at sea
radar navigation
offshore wind farms
marine radar
radar observation
landmarks
offshore
wind farms
Opis:: Offshore wind farms can improve safety at sea because they are clearly visible landmarks at sea. Although they limit the sea area available to sailors and ships, they will increase the scope of observation of the sea traffic from land, constitute additional landmarks and, thanks to the installation of additional devices in their waters, expand the area of communication between ships and land services, and increase the scope of information on sea traffic available to the services. They also practically do not limit the possibility of observation through the farm's reservoir.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 4; 647--656
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:: Validation of radar image tracking algorithms with simulated data
Autorzy:: Heymann, F.
Hoth, J.
Banyś, P.
Siegert, G.
Powiązania:: https://bibliotekanauki.pl/articles/117358.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine radar
radar image
tracking algorithms
simulated data, multi-target tracker (MTT)
maritimetraffic situation
joint probabilistic data association (JPDA)
optimal sub-pattern assignment (OSPA)
Opis:: Collision avoidance is one of the high-level safety objectives and requires a complete and reliable description of the maritime traffic situation. The radar is specified by the IMO as the primary sensor for collision avoidance. In this paper we study the performance of multi-target tracking based on radar imagery to refine the maritime traffic situation awareness. In order to achieve this we simulate synthetic radar images and evaluate the tracking performance of different Bayesian multi-target trackers (MTTs), such as particle and JPDA filters. For the simulated tracks, the target state estimates in position, speed and course over ground will be compared to the reference data. The performance of the MTTs will be assessed via the OSPA metric by comparing the estimated multi-object state vector to the reference. This approach allows a fair performance analysis of different tracking algorithms based on radar images for a simulated maritime scenario.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 511-518
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: 4.

Tytuł:: A review of electromagnetic field sources on ships
Przegląd źródeł pola elektromagnetycznego na statkach
Autorzy:: Pawłowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/111402.pdf
Data publikacji:: 2018
Wydawca:: Instytut Morski w Gdańsku
Tematy:: EMF
radiocommunication
marine radar
radio hazard
work environment
occupational safety and health
radiokomunikacja
radary morskie
środowisko pracy
bezpieczeństwo i higiena pracy
Opis:: Electromagnetic radiation is one of the possible harmful factors that occur in the work environment. The subject of the issue of the exposure of people working on ships to electromagnetic fields has so far mainly focused on the sources located on military units [18, 22, 23, 24]. On the basis of many years of experience related to the operation of the Maritime Institute in Gdansk, a laboratory that performs measurements of electromagnetic radiation for the purposes of occupational health and safety in this study is characterized briefly, sources of electromagnetic radiation that may occur on vessels.
Promieniowanie elektromagnetyczne jest jednym z potencjalnie szkodliwych czynników dla zdrowia, które występują w środowisku pracy. Tematyka poruszająca zagadnienie narażenia osób pracujących na statkach na pole elektromagnetyczne dotychczas skupiała się głównie na źródłach znajdujących się na jednostkach wojskowych [18, 22, 23, 24]. Na podstawie wieloletnich doświadczeń związanych z funkcjonowaniem w Instytucie Morskim w Gdańsku laboratorium wykonującego pomiary promieniowania elektromagnetycznego dla celów bezpieczeństwa i higieny pracy w niniejszym opracowaniu krótko scharakteryzowano źródła promieniowania elektromagnetycznego, które mogą występować na jednostkach pływających.
Źródło:: Biuletyn Instytutu Morskiego w Gdańsku; 2018, 33, 1; 75-82
1230-7424
2450-5536
Pojawia się w:: Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Antenna for marine radar with supperdirectivity properties
Autorzy:: Koshevyy, V. M.
Shevchenko, A. A.
Powiązania:: https://bibliotekanauki.pl/articles/116049.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine radars
supperdirectivity properties
radar antenna
antenna
antenna directivity
radar cross section (RCS)
radar
reception antenna diagram
Opis:: The reception antenna diagram side lobe’s level suppression algorithm for marine radar by means of antenna array with only a few tuning elements of antenna array is considered. The others no tuning elements of array are choosing for obtain a given value of average side lobe level suppression and with given value of antenna directivity without using of numerical optimization procedures. Special algorithm of interaction of these no tuning elements for realizing Supperdirectivity properties is used. The structural diagram of array is presented. The efficiency of suggested design has been investigated.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 317-324
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: 6.

Tytuł:: Edge element calculation of radar cross section of small maritime targets with respect to height of radar antenna
Autorzy:: Dodig, H.
Vukša, S.
Vidan, P.
Bukljaš, M.
Powiązania:: https://bibliotekanauki.pl/articles/116137.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine radars
radar cross section (CRS)
small maritime targets
maritime targets
radar antenna
height of radar antenna
antenna height
antenna
Opis:: From the aspect of navigational safety and collision avoidance it is very important to be able to detect small maritime targets such as buoys and small boats. Ship's radar is supposed to detect these types of targets, however the ability of radar to detect such targets depends on several factors. The most important factors affecting the detection probability of small maritime targets are height of the antenna installation on the ship and radar cross section of the target. The methods of computation radar cross section are diverse and complicated, however, in this paper we apply our previously published numerical method for the RCS computation which had proven to be very accurate. Physically to find RCS of the target one has to find the solution of electromagnetic scattering problem. The numerical method relies on the combination of finite edge volume elements and finite edge boundary elements to obtain the solution of Maxwell equations. The radiation pattern of ships radar antenna is the source of excitation for the numerical method. At the end of the paper the RCS of small maritime targets as the function of antenna height is shown. These results can be used as a parameter in radar design, as well as the guideline for the height of installation of the ship's radar antenna above the sea.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 331-336
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: 7.

Tytuł:: Radar observation of wind farms in various weather conditions
Autorzy:: Stupak, T.
Świerczyński, S.
Wąż, M.
Powiązania:: https://bibliotekanauki.pl/articles/949946.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine radars
radar observation
radar
wind farms
weather condition
CARPET 2
ship position
ship position mark
Opis:: This article presents a calculation of condition detection wind farm by ship’s radar. The authors used computer programme CARPET 2 for simulation different propagation condition. Wind farm echoes are visible in significant distance and can be advantage to ship position mark.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 325-329
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: 8.

Tytuł:: Marine parameters from radar satellite data
Autorzy:: Lehner, S.
Schulz-Stellenfleth, J.
Horstmann, J.
Powiązania:: https://bibliotekanauki.pl/articles/241032.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: marine parameters
radar satellite data
oceanographic data
wind
ocean wave fields
Opis:: In 2001 the European Space Agency ESA will launch the earth observation satellite ENVISAT. It will carry several instruments that provide new opportunities to measure oceanographic variabIes. These are the Advanced Synthetic Aperture Radar (ASAR), the Radar Altimeter (RA), the Medium Resolution Imaging Spectrometer (MERIS) and the Advanced Along-Track Scanning Radiometer (AATSR). Together, they rep-resent the main measurement techniques of satellite oceanography, and complement each other perfectly. These instruments are to be used in synergy to: ź improve the analysis of measured wind and ocean wave fields, and thereby improve weather forecasting at weather centers; ź determine the extent and variables of sea ice and develop a five-day sea ice prediction model, to support maritime shipping and offshore activities; ź monitor map sediment and suspended matter transport in coastal regions, especially in areas with large river estuaries, which greatly affects shipping lanes, harbours, and dredging activities; ź monitor hydrobiological and bio-geochemical variables related to water quality in coastal regions and large inland waters, which affects ecology, coastal development, aquaculture, drinking water supplies, and tourism. To prepare the oceanographic community to make best use of the ENVISAT sensors in the pre-Iaunch phase, existing algorithms to derive marine parameters are used and validated using data from the ERS SAR, the ERS RA, Sea WiFS, and IRS MOS sensors now in operation. Derived products, which include wind field, sea state, sea level, sea surface temperature and concentrations of water constituents, are used to address problems that can be tackled best using the synergy of radar and optical data, such as the effect of surface slicks on radar wind measurements, sea state on ocean color, wind and waves on the resuspension of suspended matter, and wind and waves on sea ice variabIes.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2001, 48, 2; 17-29
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: An improved Otsu method for oil spill detection from SAR images
Autorzy:: Yu, F.
Sun, W.
Li, J.
Zhao, Y.
Zhang, Y.
Chen, G.
Powiązania:: https://bibliotekanauki.pl/articles/47553.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: remote sensing
oil spill
detection
Otsu's method
accident
marine transport
synthetic aperture radar
Opis:: In recent years, oil spill accidents have become increasingly frequent due to the development of marine transportation and massive oil exploitation. At present, satellite remote sensing is the principal method used to monitor oil spills. Extracting the locations and extent of oil spill spots accurately in remote sensing images reaps significant benefits in terms of risk assessment and clean-up work. Nowadays the method of edge detection combined with threshold segmenta- tion (EDCTS) to extract oil information is becoming increasingly popular. However, the current method has some limitations in terms of accurately extracting oil spills in synthetic aperture radar (SAR) images, where heterogeneous background noise exists. In this study, we propose an adaptive mechanism based on Otsu method, which applies region growing combined with both edge detection and threshold segmentation (RGEDOM) to extract oil spills. Remote sensing images from the Bohai Sea on June 11, 2011 and the Gulf of Dalian on July 17, 2010 are utilized to validate the accuracy of our algorithm and the reliability of extraction results. In addition, results according to EDCTS are used as a comparator to further explore validity. The comparison with results according to EDCTS using the same dataset demonstrates that the proposed self-adapting algorithm is more robust and boasts high-accuracy. The accuracy computing by the adaptive algorithm is significantly improved compared with EDCTS and threshold method.
Źródło:: Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Verification of the accuracy requirements for relative course and closest point of approach
Autorzy:: Juszkiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/135158.pdf
Data publikacji:: 2016
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: radar systems
IMO performance standards
target tracking
safety of navigation
risk assessment
marine simulation
Opis:: Closest point of approach (CPA) is a basic factor taken into consideration for risk assessment during the meeting of two ships at sea. Navigators should use radars with automatic target tracking for collision avoidance and should know the accuracy to which radar data are calculated. Basic information about these requirements can be found in IMO resolutions. The currently binding document for devices manufactured after 2008 is IMO Resolution MSC.192(79). But there are two independent requirements for relative motion. One of these refers to relative motion parameters (relative course and speed) and the other one to the value that is the result of this motion (CPA). The other important document is Standard 62388. This specifies the minimum operational and performance requirements, methods of testing and the required test results published by IEC and also refers to radar equipment. However, this standard is not so popular in different publications focusing on radar equipment, so these requirements were not analyzed in the article. The main problem described in this paper refers to the mutual consistency of IMO Resolution requirements. The results of simulations and their analysis are presented.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 108-113
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Influence of Automatic Identification System on Safety of Navigation at Sea
Autorzy:: Stupak, T.
Powiązania:: https://bibliotekanauki.pl/articles/117256.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: marine navigation
Automatic Identification System (AIS)
safety at sea
Safety of Navigation
Gulf of Gdansk
vessel traffic service (VTS)
Radar Target
Radar Tracking
Opis:: Detection of small crafts/targets, in particular, sailing yachts with the ship's radar is not always possible. Radar reflectors are used to improve their detection. The AIS (Automatic Identification System) transmits position, motion vector and identification signals of a vessel to other ships and VTS (Vessel Traffic Services) centers . This system significantly increases the possibility to detect small crafts. The paper presents results of comparative study of using information from the Automatic Identification System and from radar to determine the accuracy of tracking the position and motion vector of ships in the Gulf of Gdansk. Possibilities and limitations of the AIS are also presented.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 337-341
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: 12.

Tytuł:: Tools for optimizing performance of VOYages at sea
Autorzy:: Johannessen, J. A.
Perrin, A.
Gaultier, L.
Herlédan, S.
Pouplin, C.
Collard, F.
Maze, J. P.
Dussauze, M.
Rapp, J.
Fanebust, R.
Andersen, S.
Franks, O.
Meyer, R.
Powiązania:: https://bibliotekanauki.pl/articles/1841544.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: voyage at sea
Copernicus Marine Environment Monitoring Service
optimization tool
synthetic aperture radar
finite-size lyapunov exponent
route optimization
sea surface temperature
route optimization algorithm
Opis:: The aim of the TOPVOYS project supported by the MarTERA ERA-Net Cofund program within the European Commission is to advance and implement analyses tools and decision support system for voyage optimisation. Based on marine weather analyses and forecasts combined with near real time satellite-based observations of wind, wave and surface current conditions as well as sea surface temperature fields the best shipping route are examined. The proposed approach aims to identify the optimum balance between minimisation of transit time and fuel consumption as well as reduction of emissions without placing the vessel at risk to damage and or crew injury. As such it is compliant with the International Maritime Organization guidelines [6] for ship routeing to keep the traffic smooth and avoid accidents, notably in the presence of unfavorable marine meteorological conditions. The tool performances will be demonstrated both in post-voyage analyses and real time operations for the North Atlantic Ocean crossings, voyages from Europe through the Mediterranean Sea and the Suez Channel to the Far East (e.g. China, South Korea) and voyages around Southern Africa.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 233-239
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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