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Wyświetlanie 1-15 z 34
Tytuł:
Zastosowanie odbiorników nawigacji satelitarnej klasy turystycznej w szczegółowym planowaniu hodowlanym
Autorzy:
Bolibok, L.
Powiązania:
https://bibliotekanauki.pl/articles/1019729.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
bledy pomiarowe
zastosowanie
planowanie hodowlane
nawigacja satelitarna
lesnictwo
odbiorniki GPS
satellite navigation
gps receiver
silvicultural planning
measurement error
Opis:
In detailed silvicultural planning, good knowledge of the internal situation (e.q. placement of advanced regeneration) in stand survey units is necessary. Information gathered in the framework of regular forest survey is not sufficient, specifically when natural stand regeneration is planned. The application of GPS is a practical, inexpensive, quick to operate technology of collecting information required for silvicultural planning and positioning spatial elements of a cutting system. As silviculture needs do not require such a high accuracy as in the case of positioning of stand survey units, it seems that the application of tourist−class GPS receivers is an optimum solution. This class equipment is inexpensive and easy to operate. The knowledge about possibilities which GPS receiver provides on the one hand and the awareness of limitations that forest environment creates for GPS measurements helps make a reliable draft of a stand's internal situation.
Źródło:
Sylwan; 2005, 149, 07; 37-50
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasady pomiaru bezpieczeństwa działalności Polskiej Agencji Żeglugi Powietrznej
The principles of safety measurement activities Polish Air Navigation Services Agency
Autorzy:
Kucharek, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/472700.pdf
Data publikacji:
2014
Wydawca:
Collegium Witelona Uczelnia Państwowa
Tematy:
Zarządzanie bezpieczeństwem ruchu lotniczego, PAŻP, Państwowa
Komisja Badania Wypadków Lotniczych, SAR.
Air traffic safety management, PANSA, The State Commission on Aircraft
Accident Investigation, SAR.
Opis:
Polska Agencja Żeglugi Powietrznej (PAŻP) jest jedyną instytucją zajmującą się zarządzaniem ruchem lotniczym w polskiej przestrzeni powietrznej. Wykonując nałożone na nią obowiązki w tym zakresie, kieruje się przede wszystkim zasadą dotyczącą stwarzania jak najbardziej bezpiecznych warunków przepływu ruchu lotniczego. Świadczenie usług nawigacji trasowej oraz nawigacji terminalowej skierowane jest głównie na zapobieganie zdarzeniom, które mogłyby przyczyniać się do powstawania kolizji statków powietrznych. W sytuacji ich zaistnienia PAŻP uczestniczy także w działaniach mających zapewnić jak najszybszą pomoc poszkodowanym w wypadkach lotniczych. Wyznacznikiem efektywności działania PAŻP w stałym podnoszeniu poziomu bezpieczeństwa ruchu lotniczego jest liczba zdarzeń zgłaszanych corocznie do Państwowej Komisji Badania Wypadków Lotniczych.
Polish Air Navigation Services Agency ( pANSA) is the only institution dedicated to manage the air traffic in the Polish airspace. While, fulfilling its’ obligations in this regard, PANSA follows the principle of creating the most secure conditions for the flow of air traffic. What is more, provision of both en route and terminal navigation is aiming primarily at prevention of the incidents, which may contribute to a collision of aircraft. However, in the event of crash occurrence PANSA is also involved in the actions ensuring the fastest possible assistance to the victims. The indicator of PANSA effectiveness in the field of continuous improvement of aviation safety is the number of events reported annually to The State Commission on Aircraft Accident Investigation.
Źródło:
Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy; 2014, 4, 13
1896-8333
Pojawia się w:
Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Velocity measurement using the FDOA Method in ground-based radio navigation system
Autorzy:
Sadowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/221491.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radio navigation
spread spectrum
velocity estimation
FDOA
Opis:
Velocity is one of the main navigation parameters of moving objects. However some systems of position estimation using radio wave measurements cannot provide velocity data due to limitation of their performance. In this paper a velocity measurement method for the DS-CDMA radio navigation system is proposed, which does not require full synchronization of reference stations carrier frequencies. The article presents basics of FDOA (frequency difference of arrival) velocity measurements together with application of this method to an experimental radio navigation system called AEGIR and with some suggestions about the possibility to implement such FDOA measurements in other kinds of asynchronous DS-CDMA radio networks. The main part of this paper present results of performance evaluation of the proposed method, based on laboratory measurements.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 363-376
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variants of structural and measurement models of an integrated navigational system
Autorzy:
Banachowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/320958.pdf
Data publikacji:
2001
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
nawigacja
zintegrowane systemy nawigacyjne
filtracja
navigation
integrated navigational systems
filtering
Opis:
The paper presents two structural and measurement variants of the Kalman filter in an integrated navigational system. The shape of a particular model is determined by the measuring capacity of navigational parameters and the assumed form of the state vector.
Źródło:
Annual of Navigation; 2001, 3; 5-17
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using authors GNSS RTK measurement system for investigation of displacement parameters of structure
Autorzy:
Figurski, M.
Wrona, M.
Nykiel, G.
Powiązania:
https://bibliotekanauki.pl/articles/225540.pdf
Data publikacji:
2011
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
nawigacja satelitarna
deformacja obiektów
satellite navigation
deformation of objects
Opis:
For almost two decades scientists from couple of world famous universities have been working on using satellite navigation data to detect deformations and movement parameters of big structures like tall buildings, long bridges or dams. Evaluation of software and hardware solutions dramatically increases spectrum of construction parameters which can be investigate using GNSS technology. This process is changing very dynamically and brings a lots of possibilities for construction specialist who investigates buildings structures. Today many Structural Monitoring Systems includes high-rate GNSS receivers and software able to calculate phase measurements to sub centimeter level. This paper introduce first test of measurement system based on Global Navigation Satellite System technique and Real Time Kinematic method.
Źródło:
Reports on Geodesy; 2011, z. 1/90; 124-129
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal navigation for blind people
Autorzy:
Marzec, Paweł
Kos, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2090710.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
blind/visually impaired person
GPS
infrared matrix
infrared sensors
low-energy measurement systems
mobile robots
satellite navigation
thermal navigation
osoba niewidoma
osoba niedowidząca
matryca podczerwieni
czujniki podczerwieni
systemy pomiarowe niskoenergetyczne
roboty mobilne
nawigacja satelitarna
nawigacja termiczna
Opis:
This article presents a system of precise navigation for a visually impaired person which uses GPS navigation and an infrared sensor in the form of an infrared matrix. The presented system allows determining the orientation and distance of a blind person relative to a selected object, e.g. a wall or road edge. The application of the above solution facilitates a significant increase in the accuracy of determining the position of a blind person compared to the accuracy offered by commonly used ground satellite devices. The system uses thermal energy accumulated in the environment without the need to generate additional signals. The main parts of the system are a simple infrared matrix, data processing system and vibrating wristband. Messages and navigation warnings are sent to a blind person in the form of a vibration code. The article describes the method of determining the path of a specified width and distance from the wall of a building, curb, etc., along which a blind person should move. The article additionally describes the method of determining the orientation of a blind person depending on the selected object. Such a method facilitates verifying whether the visually impaired person is moving according to the indicated direction. The method can also be used to navigate mobile robots. Due to the use of natural energy for data registration and processing, the mobile navigation system can be operated for a long time without the need to recharge the battery.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136038, 1--11
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal navigation for blind people
Autorzy:
Marzec, Paweł
Kos, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2173567.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
blind/visually impaired person
GPS
infrared matrix
infrared sensors
low-energy measurement systems
mobile robots
satellite navigation
thermal navigation
osoba niewidoma
osoba niedowidząca
matryca podczerwieni
czujniki podczerwieni
systemy pomiarowe niskoenergetyczne
roboty mobilne
nawigacja satelitarna
nawigacja termiczna
Opis:
This article presents a system of precise navigation for a visually impaired person which uses GPS navigation and an infrared sensor in the form of an infrared matrix. The presented system allows determining the orientation and distance of a blind person relative to a selected object, e.g. a wall or road edge. The application of the above solution facilitates a significant increase in the accuracy of determining the position of a blind person compared to the accuracy offered by commonly used ground satellite devices. The system uses thermal energy accumulated in the environment without the need to generate additional signals. The main parts of the system are a simple infrared matrix, data processing system and vibrating wristband. Messages and navigation warnings are sent to a blind person in the form of a vibration code. The article describes the method of determining the path of a specified width and distance from the wall of a building, curb, etc., along which a blind person should move. The article additionally describes the method of determining the orientation of a blind person depending on the selected object. Such a method facilitates verifying whether the visually impaired person is moving according to the indicated direction. The method can also be used to navigate mobile robots. Due to the use of natural energy for data registration and processing, the mobile navigation system can be operated for a long time without the need to recharge the battery.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136038
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of drive unit on measurement error of ultrasonic sensor in multi - rotor flying robot
Autorzy:
Gardecki, S.
Gośliński, J.
Giernacki, W.
Powiązania:
https://bibliotekanauki.pl/articles/950914.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
quadrocopter
sonar
ultrasound
navigation
Opis:
The article describes the impact of the drive units on the data obtained from ultrasonic sensors. These sensors are mounted on the multi-rotor flying robot. In experiments, previously designed ultrasonic sensor was used. On purpose of this study special testbed, consisted of a dynamometer and manipulator from KUKA company was created. In the research the influence of the location of the drive unit on the aforementioned sensor was measured. For this purpose, the sensor was placed in front, behind and in the line of the rotating propeller. The obtained results allowed to identify places where there are the least interference from the drive units that affect the ultrasonic sensor. Thanks to this, the results of measurements of the obstacles distance from a flying robot were improved.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2013, 7, 2; 12-17
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of radar distance measurement accuracy on the accuracy of position fixing in VTS systems
Autorzy:
Czaplewski, K.
Guze, S.
Świerczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/258782.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
radar
VTS
navigation
navigation automation
mathematical methods
Opis:
The main source of information on the situation across the sea basins used by operators of shipping monitoring systems is a network of coastal radar stations. Presently, it is possible to gather navigational information from many individual radar stations simultaneously, which may be used for improving the accuracy of vessel position fixing. However, without making other estimates, we obtain an inconsistent image comprising multiple echoes of the same ship, and as such it is impossible to say which echo presents the vessel on the move. Another problem is the method of performing radar observations, which significantly affects the accuracy of position fixing. The estimated radar distance is encumbered with a gross error in the case of large vessels, as the position of a large vessel is not the same as the position of the edge of the radar echo to which the estimation is made. In this paper, the authors present a method to adjust the measured radar distance. The proposed method may be automated easily, which would significantly enhance VTS positioning processes.
Źródło:
Polish Maritime Research; 2018, 3; 5-13
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The DGPS system improves survey of offshore depths
Autorzy:
Banachowicz, A.
Dołgopołow, A.
Kozłowski, Z.
Wolski, A.
Powiązania:
https://bibliotekanauki.pl/articles/224406.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
przybrzeże
pomiar głębokości
DGPS
nawigajca morska
systemy nawigacyjne
offshore
depth measurement
maritime navigation
navigational systems
Opis:
The article presents the results of research on possible applications of corrections from the reference DGPS station DGPS station at Dzwinow during measurements of depth changes in an offshore area.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 275-279
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and measurement studies of the VDES system’s terrestrial component
Autorzy:
Bronk, Krzysztof
Koncicki, Patryk
Lipka, Adam
Rutkowski, Dominik
Wereszko, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/258780.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
maritime radiocommunications
E-navigation
VHF Data Exchange System
VDE-TER
Maritime VHF channels
Opis:
In the paper, the measurement and simulation results of the VDES (VHF Data Exchange System) terrestrial component are discussed. It is anticipated that VDES will be one of the major solutions for maritime communications in the VHF band and its performance will be sufficient to fulfill the requirements of the e-navigation applications. The process of the VDES standardization (ITU R, IALA) has not been officially completed yet, but substantial amount of technical information about the future system’s terrestrial component (VDE-TER) is already available. The paper is divided into three general parts: (a) theoretical presentation of the system’s physical layer and the radio channels applicable to VDES, (b) simulation results (BER, BLER, channel delay between two propagation paths and its influence on bit rates) and (c) measurement results (useful ranges, BER). It turned out that in real maritime conditions, the VDES system can offer ranges between 25 and 38 km for the configurations assumed during the measurement campaign. Those results are generally compliant with the theoretical data in the line-of-sight conditions. In the NLOS scenarios, where fading becomes the dominant phenomenon, the discrepancies between the measurements and the theoretical results were more significant. The obtained results confirmed that VDES provides a large coding gain, which significantly improves the performance of data transmission and increases the bit rate compared to the existing maritime radiocommunication solutions. It should be noted that the results presented in the article were used by the IALA while developing the current version of the VDES specification.
Źródło:
Polish Maritime Research; 2019, 1; 95-106
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm optimization algorithm based low cost magnetometer calibration
Autorzy:
Ali, A.
Siddharth, S.
Syed, Z.
El-Sheimy, N.
Powiązania:
https://bibliotekanauki.pl/articles/129567.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
artificial intelligence
systems
measurement
navigation
algorithm
sensor
sztuczna inteligencja
systemy
pomiar
nawigacja
algorytm
Opis:
Inertial Navigation Systems (INS) consist of accelerometers, gyroscopes and a microprocessor provide inertial digital data from which position and orientation is obtained by integrating the specific forces and rotation rates. In addition to the accelerometers and gyroscopes, magnetometers can be used to derive the absolute user heading based on Earth’s magnetic field. Unfortunately, the measurements of the magnetic field obtained with low cost sensors are corrupted by several errors including manufacturing defects and external electro-magnetic fields. Consequently, proper calibration of the magnetometer is required to achieve high accuracy heading measurements. In this paper, a Particle Swarm Optimization (PSO) based calibration algorithm is presented to estimate the values of the bias and scale factor of low cost magnetometer. The main advantage of this technique is the use of the artificial intelligence which does not need any error modeling or awareness of the nonlinearity. The estimated bias and scale factor errors from the proposed algorithm improve the heading accuracy and the results are also statistically significant. Also, it can help in the development of the Pedestrian Navigation Devices (PNDs) when combined with the INS and GPS/Wi-Fi especially in the indoor environments.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 9-23
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel Variable Structure Measurement System with Intelligent Components for Flight Vehicles
Autorzy:
Shen, K.
Selezneva, M. S.
Neusypin, K. A.
Proletarsky, A. V.
Powiązania:
https://bibliotekanauki.pl/articles/220386.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flight vehicle
variable structure measurement system
degree of observability
self-organization algorithm
integrated navigation system
Opis:
The paper presents a method of developing a variable structure measurement system with intelligent components for flight vehicles. In order to find a distinguishing feature of a variable structure, a numerical criterion for selecting measuring sensors is proposed by quantifying the observability of different states of the system. Based on the Peter K. Anokhin’s theory of functional systems, a mechanism of “action acceptor” is built with intelligent components, e.g. self-organization algorithms. In this mechanism, firstly, prediction models of system states are constructed using self-organization algorithms; secondly, the predicted and measured values are compared; thirdly, an optimal structure of the measurement system is finally determined based on the results of comparison. According to the results of simulation with practical data and experiments obtained during field tests, the novel developed measurement system has the properties of high-accuracy, reliable operation and fault tolerance.
Źródło:
Metrology and Measurement Systems; 2017, 24, 2; 347-356
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitorowanie stanu geometrycznego przepraw mostowych z wykorzystaniem systemu nawigacji satelitarnej
Condition monitoring geometric bridges using satellite navigation system
Autorzy:
Wrona, M.
Piotrowska, W.
Powiązania:
https://bibliotekanauki.pl/articles/313932.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
system nawigacji satelitarnej
nawigacja satelitarna
pomiar geodezyjny
przeprawa mostowa
satellite navigation system
geodetic measurement
crossing bridge
Opis:
Artykuł opisuje problematykę geodezyjnych pomiarów konstrukcji mostowych. Ze względu na coraz większą skalę wznoszonych obiektów istnieje potrzeba dostarczania coraz lepszych narzędzi pozwalających na wiarygodną kontrolę odkształceń i przemieszczeń konstrukcji. Jest to niezbędne dla zweryfikowania faktycznego stanu technicznego obiektu oraz zapewnienia najwyższego stopnia bezpieczeństwa. Oprócz opisu licznych instalacji monitoringu geodezyjnego na świecie, autorzy przedstawili przykłady pierwszych w Polsce testów pomiarowych na obiektach mostowych. Opisano próby wykorzystania wysokoczęstotliwościowych pomiarów GNSS w badaniu dynamiki konstrukcji Mostu Siekierkowskiego w Warszawie.
The article describes issues of bridge construction measurements using new survey methods. Increasing scale of emergent constructions needs better measurement tools for reliable control of deformations and movements of the object. It is essential to verify condition of the construction and provide the highest level of safety. Authors characterize sample monitoring installations and first in Poland measurement tests on bridges. Integrated measurements techniques were used on Siekierkowski Bridge in Warsaw using high rate GNSS data for measurements dynamics of the construction.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 493-496
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost navigation and guidance systems for Unmanned Aerial Vehicles. Part 1: Vision-based and integrated sensors
Autorzy:
Sabatini, R.
Bartel, C.
Kaharkar, A.
Shaid, T.
Rodriguez, L.
Zammit-Mangion, D.
Jia, H.
Powiązania:
https://bibliotekanauki.pl/articles/320426.pdf
Data publikacji:
2012
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
Vision-Based Navigation
integrated navigation system
MEMS Inertial Measurement Unit
unmanned aerial vehicle
Low-cost Navigation Sensors
Opis:
In this paper we present a new low-cost navigation system designed for small size Unmanned Aerial Vehicles (UAVs) based on Vision-Based Navigation (VBN) and other avionics sensors. The main objective of our research was to design a compact, light and relatively inexpensive system capable of providing the Required Navigation Performance (RNP) in all phases of flight of a small UAV, with a special focus on precision approach and landing, where Vision Based Navigation (VBN) techniques can be fully exploited in a multisensor integrated architecture. Various existing techniques for VBN were compared and the Appearance-Based Approach (ABA) was selected for implementation. Feature extraction and optical flow techniques were employed to estimate flight parameters such as roll angle, pitch angle, deviation from the runway and body rates. Additionally, we addressed the possible synergies between VBN, Global Navigation Satellite System (GNSS) and MEMS-IMU (Micro-Electromechanical System Inertial Measurement Unit) sensors, as well as the aiding from Aircraft Dynamics Models (ADMs). In particular, by employing these sensors/models, we aimed to compensate for the shortcomings of VBN and MEMS-IMU sensors in high-dynamics attitude determination tasks. An Extended Kalman Filter (EKF) was developed to fuse the information provided by the different sensors and to provide estimates of position, velocity and attitude of the UAV platform in real-time. Two different integrated navigation system architectures were implemented. The first used VBN at 20 Hz and GPS at 1 Hz to augment the MEMS-IMU running at 100 Hz. The second mode also included the ADM (computations performed at 100 Hz) to provide augmentation of the attitude channel. Simulation of these two modes was accomplished in a significant portion of the AEROSONDE UAV operational flight envelope and performing a variety of representative manoeuvres (i.e., straight climb, level turning, turning descent and climb, straight descent, etc.). Simulation of the first integrated navigation system architecture (VBN/IMU/GPS) showed that the integrated system can reach position, velocity and attitude accuracies compatible with CAT-II precision approach requirements. Simulation of the second system architecture (VBN/IMU/GPS/ADM) also showed promising results since the achieved attitude accuracy was higher using the ADM/VBS/IMU than using VBS/IMU only. However, due to rapid divergence of the ADM virtual sensor, there was a need for frequent re-initialisation of the ADM data module, which was strongly dependent on the UAV flight dynamics and the specific manoeuvring transitions performed.
Źródło:
Annual of Navigation; 2012, No. 19, part 2; 71-98
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
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