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Tytuł:
3D picture display for navigation radar
Autorzy:
Wąż, M.
Powiązania:
https://bibliotekanauki.pl/articles/320875.pdf
Data publikacji:
2006
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
radar
system nawigacyjny
obrazowanie
navigation system
visualization
Opis:
Tree-dimensional sea space visualization become increasingly form of ship's environment presentation in maritime navigation systems. Sonograms and echograms for instance, should create underwater space in 3D because the object (or submerge unit) accurate localization in 2D is impossible between sea bottom and surface. For surface navigation 3D vector charts can be observed mostly in combat systems or ship's bridge simulators for some years. This article presents 3D radar screen visualization possibilities for navigation radar.
Źródło:
Annual of Navigation; 2006, 11; 137-142
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dedicated computer system for FM-CW radar applications
Autorzy:
Heijnen, S.H.
Sinttruijen, J.S. van
Zwan, F.W. van der
Ligthart, L.P.
Powiązania:
https://bibliotekanauki.pl/articles/309084.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
radar
data processing
system control
Opis:
In this paper, a DSP based computer system for FM-CW radar applications is described. Besides data acquisition and storage, the computer system will also be used for front-end data processing and system control. Processing includes filtering and clutter suppression. The radar for which the computer is designed is a multi parameter atmospheric profiler capable of doing Doppler and polarimetric measurements. The computer system will allow for a measurement of the full polarimetric scattering matrix over 512 range cells and 512 Doppler cells in 2 s. Radar system control includes the timing and the settings of the radar system together with linearity correction of the sweep oscillator.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 4; 21-25
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of feature selection in the aspect of specific identification of radar signals
Autorzy:
Dudczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/200837.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radar emitter recognition
RER
specific emitter identification
SEI
minimum distance classification
ELINT system
klasyfikator minimalnej odległości
System ELINT
Opis:
This article presents an important task of classification, i.e. mapping surfaces which separate patterns in feature space in the scope of radar emitter recognition (RER) and classification. Assigning a tested radar to a particular class is based on defining its location from the discriminating areas. In order to carry out the classification process, it is necessary to define metrics in the feature space as it is essential to estimate the distance of a classified radar from the centre of the class. The method presented in this article is based on extraction and selection of distinctive features, which can be received in the process of specific emitter identification (SEI) of radar signals, and on the minimum distance classification. The author suggests a RER system which consists of a few independent channels. The task of each channel is to calculate the distance of the tested radar from a given class and finally, set the correct identification coefficient for each recognized radar. Thus, a multichannel system with independent distance measurement is obtained, which makes it possible to recognize particular radar copies. This system is implemented in electronic intelligence (ELINT) system and tested in real battlefield conditions.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 113-119
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ability to test shipboard automatic identification system instability and inaccuracy on simulation devices
Autorzy:
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/135368.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
automatic identification system
automatic radar plotting aid
closest point of approach
time needed to reach the closest point of approach
accuracy
stability of indication
Opis:
According to the International Maritime Organisation (IMO) recommendation, when the target data from the automatic identification system (AIS) and radar tracking are both available and the association criteria are fulfilled such that the AIS and radar information are considered for one physical target, then as a default condition of radar equipment, the AIS target symbol and the alphanumerical AIS target data, including information on the closest point of approach (CPA) and time needed to reach the CPA (TCPA) should be automatically selected and displayed as this is more accurate than radar tracking data as the current values of true and relative vectors of a manoeuvring object can be presented without time delay which is characteristic for radar tracking. Research conducted at sea on two ships using real navigational equipment has shown that sometimes onboard AIS presents CPA of other vessels equipped with this device as unstable and inaccurate as the automatic radar plotting aid (ARPA). The source of these instabilities and inaccuracies is to be discovered and thus implemented into radar-navigational simulators used for radar training at operational and management levels. This article briefly describes the encountered inaccuracy and instability of the values of the CPA of the encountered vessel presented by AIS, on current shipboard systems, and the possibilities of their demonstration on simulation devices.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 128-134
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accurate Phase Calibration for Digital Beam-Forming in Multi-Transceiver HF Radar System
Autorzy:
Nguyen, H. Q.
Whittington, J. S.
Devlin, J. C.
Vu, H. L.
Vu, N. V.
Custovic, E.
Powiązania:
https://bibliotekanauki.pl/articles/227073.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital beamforming
phased array antenna
phase calibration
radar
transceivers
Opis:
The TIGER-3 radar is being developed as an “all digital” radar with 20 integrated digital transceivers, each connected to a separate antenna. Using phased array antenna techniques, radiated power is steered towards a desired direction based on the relative phases within the array elements. This paper proposes an accurate phase measurement method to calibrate the phases of the radio output signals using Field Programmable Gate Array (FPGA) technology. The method sequentially measures the phase offset between the RF signal generated by each transceiver and a reference signal operated at the same frequency. Accordingly, the transceiver adjusts its phase in order to align to the reference phase. This results in accurately aligned phases of the RF output signals and with the further addition of appropriate phase offsets, digital beamforming (DBF) can be performed steering the beam in a desired direction. The proposed method is implemented on a Virtex-5 VFX70T device. Experimental results show that the calibration accuracy is of 0.153 degrees with 14 MHz operating frequency.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 3; 245-254
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-collision system with radar obstacle detector
Antykolizyjny system wykorzystujący radarowy detektor przeszkód
Autorzy:
Graffstein, J.
Powiązania:
https://bibliotekanauki.pl/articles/276558.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
system antykolizyjny
system wykrywania przeszkód
awionika
anti-collision system
collision avoidance system
avionics
Opis:
In the article the construction of anti-collision system with radar obstacle detector is presented. Cooperation between individual sub-systems and devices is described in the paper. Functionality of subsequent sub-systems is discussed. Significant parameters characterising the system and its elements are presented.
W pracy przedstawiono opis budowy systemu antykolizyjnego wykorzystującego radarowy detektor przeszkód. Opisano sposób współdziałania poszczególnych urządzeń. Przedstawiono sposób i zakres wykonywanych funkcji przez poszczególne urządzenia systemu. Zamieszczono istotne parametry techniczne charakteryzujące system i jego elementy.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 2; 171-175
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-drone sensors, effectors, and systems –a concise overview
Autorzy:
Zmysłowski, D.
Skokowski, P.
Kelner, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/24201470.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
counter unmanned aerial system
anti-drone system
acoustic sensor
optical sensor
RF scanner
radar
jammer
net
Opis:
The dynamic development of microelectronics and wireless communication at the turn of the 20th and 21st centuries contributed to the increase in the availability and popularity of all kinds of unmanned platforms, air, land, surface, and underwater. In the case of unmanned aerial vehicles (UAVs), also popularly known as drones, the significant (crucial) advantages are high freedom of motion (i.e., the ability to move in three planes) and the possibility of using it practically anywhere (as opposed to water platforms). These factors influenced the dynamic development of this market sector and the high availability of various models and equipment. UAVs are being used in many sectors and services, both for civil and military purposes. Widespread availability, low cost, and ease of use also favor the possibility of using civilian UAVs for criminal, smuggling, terrorist, or military purposes. Recent armed conflicts, e.g., in Nagorno-Karabakh or Ukraine, and the situation on the eastern Polish-Belarusian border clearly show this. All countries recognize the potential and threat posed by the development of unmanned platforms. Therefore, for several years, special attention has been paid to analyses and research in sensors, effectors, and anti-drone systems. It is worth emphasizing that some effectors (e.g., jammers or spoofers) may significantly affect the navigation process of neighboring objects that use global navigation satellite systems (GNSSs). On the other hand, the use of anti-drone systems is important, especially in the context of protecting institutions and facilities of companies, state administration (i.a., embassies, consulates), army, strategic importance objects (e.g., related to energy, chemical industry), or protection of mass events. In this paper, we present an overview of solutions available on the market and development directions in the field of anti-drone technology.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 455--461
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-Radiation Missiles vs. Radars
Autorzy:
Czeszejko, S.
Powiązania:
https://bibliotekanauki.pl/articles/226178.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
anti-radiation missiles
radar
radiolocation
air defense system
survive to operate on the battlefield
Opis:
In this article the author makes an attempt to characterize the factors which are to be taken into consideration while designing the ground radar component of Air Defense systems, in order to enable them to operate on the modern battlefield. He presents the latest theoretical views on the relationship between the usage of anti-radar weapons and the organizational and technical defense mechanisms which can be deployed against such weapons. In particular the author emphasizes the protection of radars against anti-radiation missiles (ARMs) which present the biggest threat for effective Air Defense systems. He also stresses the need to combine radars into one system which enables the streamlining of their work parameters and thus ensuring their complex usage. The gaining of those capabilities will guarantee that the parameters of the air surveillance radar zone can be defined effectively.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 3; 285-291
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of IBIS system to measuring and analysis of displacement on the example of bridge
Zastosowanie systemu IBIS do pomiaru i analizy przemieszczeń na przykładzie obiektu mostowego
Autorzy:
Owerko, T.
Puniach, E.
Sukta, O.
Powiązania:
https://bibliotekanauki.pl/articles/385578.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
radar interferometry
measuring of displacement
bridges
interferometria radarowa
pomiar przemieszczeń
mosty
Opis:
This paper presents the issue of building structure measurements. The article presents capabilities of ground-based interferometric radar IBIS in precise survey of bridge spans displacements. Of is shown by an example of complete survey and data processing of a railway bridge.
W pracy poruszono problem geodezyjnych pomiarów konstrukcji budowlanych. Artykuł prezentuje możliwości wykorzystania naziemnego radaru interferometrycznego IBIS do precyzyjnych pomiarów przemieszczeń przęseł mostów. Jako przykład zaprezentowano sposób opracowania danych pomiarowych pozyskanych w wyniku obserwacji mostu kolejowego.
Źródło:
Geomatics and Environmental Engineering; 2012, 6, 4; 61-72
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania radarowego systemu ACC w warunkach drogowych
Testing of the radar system ACC in road conditions
Autorzy:
Filipiak, M.
Jajczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/376394.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
bezpieczeństwo czynne
ABS
ESP
tempomat
ACC
Opis:
W artykule omówiono budowę i zasadę działania systemu aktywnego tempomatu. Opisano elementy wchodzące w skład systemu ACC począwszy od czujników aż po systemy bezpieczeństwa czynnego takie jak ABS i ESP. Przedstawiono rozmieszczenie elementów i scharakteryzowano ich współpracę zapewniającą prawidłowe działanie systemu ACC. W badaniach drogowych, które zrealizowano w ramach pracy, sprawdzono zachowanie się pojazdu wyposażonego w układ ACC. Sprawdzono jego działanie podczas hamowania, zatrzymywania i przyspieszania pojazdu. Zbadano zachowanie systemu przy jeździe na łuku za innym pojazdem oraz sprawdzono reakcję systemu przy zajechaniu drogi przez pojazd wyprzedzający.
The article discusses the design and operation of the system of active cruise control. Describes the elements included in the ACC from the sensors to the active safety systems such as ABS and ESP. They show the distribution of elements and characterized their cooperation ensures proper operation of the ACC system. In studies of road, which was carried out in the context of work, checked the behaviour of the vehicle equipped with the ACC. Tested for its effectiveness during braking, stopping and acceleration of the vehicle. We examined the behaviour of the system when driving on a curve behind another vehicle and checked the reaction of the system when the road is blocked by the overtaking vehicle.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 86; 267-276
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comaparative study of the accuracy of AIS and ARPA indications. Part 2. Accuracy of the opposite vessel true course and true speed indication
Autorzy:
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/116449.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Automatic Identification System (AIS)
ARPA
Closest Point of Approach (CPA)
radar equipment
accuracy
accuracy of position
accuracy of AIS indications
accuracy of ARPA indications
Opis:
The article presents analysis of the automatic radar plotting aid (ARPA) and automatic identification system (AIS) indications reliability performed on the base of the results of measurements conducted on merchant vessels at sea. In the first part of the article titled “Comparative study of the accuracy of AIS and ARPA indications. Part 1. Accuracy of the CPA indications” are described: vessels on which the tests were carried out, AIS and radar equipment installed on them, observed meeting situations and accuracy of the CPA indication. In this article are discussed, for the same meeting situations, accuracy of the information on true course and true speed of the opposite vessel presented by ARPA and AIS and correlation between this accuracies and errors of the CPA indication.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 673-678
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of the data on the surface currents and wind parameters generated by numerical models on the Szczecin Lagoon area
Autorzy:
Kijewska, M.
Pleskacz, K.
Kasyk, L.
Powiązania:
https://bibliotekanauki.pl/articles/117323.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Szczecin Lagoon
surface current
wind parameters
hydrodynamic model
weather forecast
numerical models
Geographic Information System (GIS)
High Frequency Surface Wave Radar (HFSWR)
Opis:
This study focuses on the investigation of available surface currents and wind parameters for employing them in order to predict the survivor movement in the Szczecin Lagoon waters. For this purpose, the surface currents and wind parameters were generated by selected numerical models and the wind parameters were also measured with the telemetry devices. In this paper, the PM3D hydrodynamic model and the NEMS, ECMWF, GFS weather forecast models have been investigated. The measurements of the wind parameters, recorded at the Brama Torowa I and Trzebież stations, were also analyzed. As part of the research, an expert method was used to evaluate the surface currents parameters. In turn, the method based on comparing the forecasted wind parameters with the measured wind parameters was applied in order to assess uncertainties of these parameters. The comparative analyses of the data on the surface currents and wind parameters have been done and probabilistic models for uncertainties of these forecasted parameters have been formulated. Additionally, relations between the surface currents speeds and the wind speeds, in the case when their directions were consistent, have been also discovered.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 729-737
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Study of the Accuracy of AIS and ARPA Indications. Part 1. Accuracy of the CPA Indications
Autorzy:
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/117390.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Automatic Identification System (AIS)
ARPA
Closest Point of Approach (CPA)
accuracy
CPA Accuracy
comparative study
radar tracking
AIS target
Opis:
According to the IMO recommendation when the target data from radar tracking and AIS are both available and the association criteria are fulfilled such that the radar and AIS information are considered as for one physical target, then as a default condition in radar equipment should be automatically selected and displayed the AIS target symbol and the alphanumerical AIS target data only. The article presents research conducted in real sea conditions on the reliability of information presented by the ship's AIS and ARPA about the passing distance with the other vessel tracked by radar equipment and fitted with AIS.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 439-443
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of passive and active radar systems
Autorzy:
Žáčik, N.
Novák, A.
Powiązania:
https://bibliotekanauki.pl/articles/253633.pdf
Data publikacji:
2015
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
tracking system
passive radar system
active radar system
radar network
pasywny system radarowy
aktywny system radarowy
sieć radarowa
Opis:
This article presents the conclusion from my two theses, Comparison of tracking systems and Tracking systems. In the first part with title Comparison of tracking system, was my work focused to research of primary and secondary radar technology with very detailed description and principle of their use. This part of my research consists also from comparison of those two different types of technologies, their advantages and disadvantages. This research was the base stone for my second part of thesis with title: Tracking systems and conclusions, summarized in this article. The second part of thesis is more focused to civil and army passive radar and meteorological technology. The main topic is: how to build up the new radar network by using passive radar technology and what are the advantages and disadvantages of this concept, in comparison with actual primary and secondary radar network. I have chosen Slovak Republic for new network planning but this theory and research is applicable for all the other countries, with some minor changes. This topic is focused mainly to advantages of passive surveillance system and multilateration.
Źródło:
TTS Technika Transportu Szynowego; 2015, 12; 1709-1712, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CRM-203 Type Frequency Modulated Continuous Wave (FM CW) Radar
Autorzy:
Plata, M.
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/117181.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
radar
Frequency Modulated Continuous Wave (FMCW)
FMCW Radar
Mean Time Between Failure (MTBF)
signal processing
fast Fourier transformation (FFT)
Constant False Alarm Ratio (CFAR)
Automatic Identification System (AIS)
Opis:
Paper presents description of the principle of work, structure and basic technical parameters of the Maritime Coastal Surveillance Frequency Modulated Continuous Wave (FMCW) Radar CRM-203 type constructed by Telecommunication Research Institute Ltd. in Gda?sk. Results of its tests in real conditions and comparison with pulse ship radars with scanners installed in the same place will be presented during the conference.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 311-314
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
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