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Journal articles on the topic 'Radio navigation field'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Baburov, V. I., N. V. Ivantsevich, and O. I. Sauta. "METHOD OF DIFFERENTIAL CORRECTION OF THE NAVIGATIONAL FIELD OF SHORT-RANGE NAVIGATION AND LANDING SYSTEMS WITH USE GLONASS." Issues of radio electronics, no. 7 (July 20, 2018): 6–12. http://dx.doi.org/10.21778/2218-5453-2018-7-6-12.

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The effective requirements of the International Civil Aviation Organization (ICAO) for accuracy and reliability of aircraft (AC) positioning, especially in case of flights in the airfield area, make it particularly relevant to harmonize the accuracy characteristics of various radio systems so that any of them can be utilized during the flight. AC positioning accuracy amounts to several metres for standard GNSS modes or several centimetres for differential modes. At the same time, positioning errors for traditional short-range navigation and landing systems (VOR/DME, SHORAN or ILS), especially

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Sandmann, Sergei, and Heyno Garbe. "Uncertainty contribution of a wind turbine to the electric field of a DVOR antenna as a function of wind direction and rotor position." Advances in Radio Science 14 (September 28, 2016): 17–24. http://dx.doi.org/10.5194/ars-14-17-2016.

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Abstract. The presence of a wind turbine (WT) has the potential to distort electromagnetic fields emitted by terrestrial radio navigation aids. In this paper especially the field distortion of a Doppler Very High Frequency Omnidirectional Radio Range (DVOR) surveillance navigation system is investigated as a function of wind direction and rotor position. Therefor, the field distribution of a DVOR is simulated in the surrounding of a WT for 104 combinations of the angles of wind direction and rotor position. Furthermore, these calculations are executed for two different rotor diameters and 10 s

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Nikolaev, A. V., E. I. Starovoitov, D. V. Fedosov, A. V. Kolesnikov, and M. A. Filin. "Navigation Technology of Unmanned Vehicles Based on Electromagnetic Induction." Mekhatronika, Avtomatizatsiya, Upravlenie 24, no. 11 (2023): 583–89. http://dx.doi.org/10.17587/mau.24.583-589.

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The article deals with the issues of determining the position of unmanned vehicles (UV) in tunnels in the absence of signals from global navigation satellite systems (GNSS) and unfavorable operating conditions, such as low light, high humidity, radioactivity and others. The authors proposes a method for navigating unmanned vehicles based on the phenomenon of electromagnetic induction. On board the unmanned vehicle there is a high-frequency generator, a radio transmitting unit, a radio receiving unit, an information management system, and under the bearing or supporting surface of the unmanned

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Jóźwik-Michałowska, Natalia, and Andrzej Felski. "The Electromagnetic Field in the Vicinity of Radio-Navigation Systems." Annual of Navigation 25, no. 1 (2018): 109–24. http://dx.doi.org/10.1515/aon-2018-0008.

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AbstractToday, electromagnetic waves are the basic medium for all communication tasks. This applies also to navigation, where the most commonly waves have lengths measured in centimetres (radar, GPS) and longer, such as the waves used in the AIS or DGPS technologies. Navigators are mostly interested in the communication functionality of the used systems, i.e. such factors as range of the system and signal-to-noise ratio. This leads directly to increasing the transmitters’ power. However, it is important to bear in mind that the electromagnetic field can endanger human health, therefore, establ

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Wingate, Miles. "The Future of Conventional Aids to Navigation." Journal of Navigation 39, no. 2 (1986): 225–47. http://dx.doi.org/10.1017/s0373463300000096.

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The paper first of all defines conventional aids to navigation and compares both the historical and future roles of these aids in relation to developments in the field of radio navigation systems and technological advances in shipborne navigational aids. It goes on to emphasize the need to provide for all classes of vessel, i.e. those equipped with a high level of sophisticated shipborne aids and those equipped with a low level of such aids, including the not-so-well-found vessel, fishing vessels and leisure craft. Mention is made of present mandatory requirements in respect of the carriage of

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Dvornikov, Sergey, Sergey Yakushenko, and Andrey Pogorelov. "PROBLEMS OF NAVIGATION SUPPORT FOR MOVING OBJECTS IN EMERGENCY ZONES." Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» 2023, no. 3 (2023): 45–53. http://dx.doi.org/10.61260/2218-130x-2023-3-45-53.

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The paper shows the effectiveness of navigation support for grouping mobile objects under conditions of action in a zone with increased danger and destructive effects on the radio navigation field of positioning means. The problems of functioning of the user's navigation equipment are revealed and ways to solve them are proposed. The research results can be applied in the organization of rescue operations using navigation support systems, as well as by manufacturers of navigation equipment for determining the location of mobile objects in difficult operating conditions.

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Loh, Robert. "GPS Wide Area Augmentation System (WAAS)." Journal of Navigation 48, no. 2 (1995): 180–91. http://dx.doi.org/10.1017/s0373463300012649.

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Today, no single technology has more broad-reaching potential for worldwide civil aviation than the future applications of satellite technology. These applications represent the greatest opportunity to enhance aviation system capacity, efficiency and safety since the introduction of radio-based navigation systems more than 50 years ago. The foundation for this optimism is the Global Positioning System (GPS), a satellite-based radio navigation system operated and controlled by the United States Department of Defense (DoD). In December 1993, DoD declared GPS to be in initial operational capabili

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Kanu, Ogechukwu, and Nosa Bello. "Real-Time Implementation of a Cognitive Radio Node for Video Transmission with Dynamic Channel Selection." Jordan Journal of Electrical Engineering 10, no. 2 (2024): 1. http://dx.doi.org/10.5455/jjee.204-1688576444.

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This paper endeavors to exploit the extent to which the radio spectrum can be utilized by almagating and enhancing various methods proposed by previous researchers in the field. Cognitive radio research addresses the challenge of spectrum scarcity and underutilization through cognitive radio technology. The realm of cognitive radio research encompasses diverse aspects of its architecture, ranging from spectrum sensing to higher-level strategies. Notably, the navigation strategy employed by cognitive radios constitutes a pivotal layer in these implementations. Thus, this paper focuses on the re

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Pany, T., D. Akos, J. Arribas, et al. "GNSS Software-Defined Radio: History, Current Developments, and Standardization Efforts." NAVIGATION-JOURNAL OF THE INSTITUTE OF NAVIGATION 71, no. 1 (2024): navi.628. https://doi.org/10.33012/navi.628.

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Taking the work conducted by the global navigation satellite system (GNSS) software-defined radio (SDR) working group during the last decade as a seed, this contribution summarizes, for the first time, the history of GNSS SDR devel-opment. This report highlights selected SDR implementations and achievements that are available to the public or that influenced the general development of SDR. Aspects related to the standardization process of intermediate-frequency sample data and metadata are discussed, and an update of the Institute of Navigation SDR Standard is proposed. This work focuses on GN

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Kharchenko, Volodymyr, Oleksiy Pogurelskiy, and Valeriy Konin. "Hardware and Software Complex for Laboratory of Satellite Technologies." Logistics and Transport 45, no. 1 (2020): 95–102. http://dx.doi.org/10.26411/83-1734-2015-1-45-8-20.

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Satellite technologies of communication, navigation and surveillance play an important role in modern transport, and particularly in aviation. High effectiveness of global air navigation system is provided by applying data broadcasted from great numbers of satellites, located on Earth orbits. The totality of existing satellite navigation system forms global radio navigation field which parameters should be constantly monitored and controlled for providing safety requirements. The aim of this article is to share experience of creating a laboratory of satellite technologies at the National Aviat

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Zheng, Ruikang, Xuan Li, and Yudong Chen. "An Overview of Cognitive Radio Technology and Its Applications in Civil Aviation." Sensors 23, no. 13 (2023): 6125. http://dx.doi.org/10.3390/s23136125.

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This paper provides an overview of cognitive radio technology and its applications in the field of civil aviation. Cognitive radio technology is a relatively new and emerging field that allows for dynamic spectrum access and efficient use of spectrum resources. In the context of civil aviation, cognitive radio technology has the potential to enable more efficient use of the limited radio spectrum available for communication and navigation purposes. This paper examines the current state of cognitive radio technology, including ongoing research and development efforts, regulatory issues, and pot

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Bashkuev, Yuri, Victor Advokatov, Darima Buyanova, and Mikhail Pushkarev. "Analysis of the Conditions for the Radio Waves Propagation in the Waveguide “Earth-Ionosphere” on the Paths “Novosibirsk-Ulan-Ude” and “Komsomolsk-on-Amur-Ulan-Ude” During Magnetic Storms August 31-September 12, 2017." E3S Web of Conferences 62 (2018): 01002. http://dx.doi.org/10.1051/e3sconf/20186201002.

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In order to analyze the radio waves propagation conditions in non-uniform impedance channels, the amplitude and additional phase of the electromagnetic field of the VLF radio navigation system RSDN-20 were measured. The radio paths of latitudinal strike have been studied: path 1 “Novosibirsk - Ulan-Ude”, the length is 1580 km; path 2 “Komsomolsk-on-Amur - Ulan-Ude”, the length is 2080 km. The daily variations of the amplitude and the additional phase of the 11.9 and 14.88 kHz radio signals are considered.

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Karetnikov, Vladimir, Denis Milyakov, Andrei Prokhorenkov, and Evgeniy Ol’khovik. "Prospects of application of mass-produced GNSS modules for solving high-precision navigation tasks." E3S Web of Conferences 244 (2021): 08006. http://dx.doi.org/10.1051/e3sconf/202124408006.

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Nowadays, both in the Russian Federation and in foreign countries, the use of global navigation satellite systems (GNSS) for solving various applied problems is an extremely popular solution. Taking into account the current level of development of satellite radio navigation systems, ordinary users have been able to determine their position with a sufficiently high accuracy. However, some tasks require the use of high-precision equipment of geodetic class. Such equipment allows obtaining navigation solutions with an accuracy of better than 10 cm. Unfortunately, the cost of navigation-class navi

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Boran-Keshishian, A. L., A. A. Alekseev, V. V. Popov, and A. I. Kondratyev. "Stability and increased radio communication coverage of sea area infrastructure measurement antennas." Journal of Physics: Conference Series 2061, no. 1 (2021): 012025. http://dx.doi.org/10.1088/1742-6596/2061/1/012025.

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Abstract This research presents a modified method of signal amplification over layered surfaces of absolutely thin ice over marine waters on condition of stable operation of communication networks, necessary for deployment of Big Information Management Communication Systems and the concept of E-Navigation development. The method was first tested when deploying a GMSSB(b) network in the Azov-Black Sea region. Peculiarity of radio wave behavior during propagation over thin layered ice is that mutual phase ratios make a part of field energy “sticking” to the surface and propagating along it, thus

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Karfakis, Panagiotis T., Micael S. Couceiro, and David Portugal. "NR5G-SAM: A SLAM Framework for Field Robot Applications Based on 5G New Radio." Sensors 23, no. 11 (2023): 5354. http://dx.doi.org/10.3390/s23115354.

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Robot localization is a crucial task in robotic systems and is a pre-requisite for navigation. In outdoor environments, Global Navigation Satellite Systems (GNSS) have aided towards this direction, alongside laser and visual sensing. Despite their application in the field, GNSS suffers from limited availability in dense urban and rural environments. Light Detection and Ranging (LiDAR), inertial and visual methods are also prone to drift and can be susceptible to outliers due to environmental changes and illumination conditions. In this work, we propose a cellular Simultaneous Localization and

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16

Korcz, Karol. "Main Aspects of a Maritime E-Navigation Project." Journal of KONES 26, no. 3 (2019): 83–90. http://dx.doi.org/10.2478/kones-2019-0061.

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Abstract Many devices and systems, including electronic ones, are used in the operation of sea-going vessels. Fast technological development in the field of electronics, radio communications and computer science inspires the more and more new proposals for the changes of these devices and systems. The rules and scope of sea-going vessels equipment, related to ensuring their safety, are strictly regulated by the International Maritime Organization (IMO). Considering the above, several countries have submitted to the IMO-Maritime Safety Committee (MSC) a proposal to prepare a vision of a broad s

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Lavrentieva, Elena A. "Professional competencies of Marine Radio specialists in the field of Global Maritime Distress and Safety System." Alma mater. Vestnik Vysshey Shkoly, no. 6 (June 2023): 62–68. http://dx.doi.org/10.20339/am.06-23.062.

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The article discusses the peculiarities of the professional competencies of Marine Radio specialists in the field of the Global Maritime Distress and Safety System (GMDSS), which is distinguished by a high degree of automation of the transmission and reception of information for search and rescue operations with minimal time. This applies to operators and senior operators of the GMDSB facility, operators of a limited area of the GMDSS, operator of the GMDSS, first and second class radio electronics of the GMDSS, the main professional characteristics of which are summarized in the professional

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18

Herianto, Toshiki Sakakibara, Tomoaki Koiwa, and Daisuke Kurabayashi. "Realization of a Pheromone Potential Field for Autonomous Navigation by Radio Frequency Identification." Advanced Robotics 22, no. 13-14 (2008): 1461–78. http://dx.doi.org/10.1163/156855308x360569.

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19

Sakpere, Wilson E., Nhlanhla Boyfriend Wilton Mlitwa, and Michael Adeyeye Oshin. "Towards an efficient indoor navigation system: a near field communication approach." Journal of Engineering, Design and Technology 15, no. 4 (2017): 505–27. http://dx.doi.org/10.1108/jedt-10-2016-0073.

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Purpose This research aims to focus on providing interventions to alleviate usability challenges to strengthen the overall accuracy and the navigation effectiveness in indoor and stringent environments through the experiential manipulation of technical attributes of the positioning and navigation system. Design/methodology/approach The study followed a quantitative and experimental method of empirical enquiry and software engineering and synthesis research methods. The study further entails three implementation processes, namely, map generation, positioning framework and navigation service usi

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20

Yuyukin, I. V. "Map-aiding of the additional secondary factors isosurface by the spline approximation method as a condition of improving the e-Loran observations accuracy." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 16, no. 1 (2024): 37–54. http://dx.doi.org/10.21821/2309-5180-2024-16-1-37-54.

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The benefit of the Loran ground-based radio navigation system as an alternative to global navigation satellite systems is argued. The motivation of searching for a duplicate variant is caused by the necessity to ensure the reliability of positioning as a subject of countering spoofing and jamming risks when implementing the concept of cybernetic awareness on water transport. Hypothetically, the possibility of using e-Loran on the Northern Sea Route as a backup navigation system is considered. The experience of operating pilot projects of the enhanced Loran in the issue of the predicted potenti

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Burylin, Ia V. "Interface for indication and remote control of an unmanned vessel in automatic and manual modes." Journal of Physics: Conference Series 2061, no. 1 (2021): 012074. http://dx.doi.org/10.1088/1742-6596/2061/1/012074.

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Abstract The article proposes a method for organizing the communication interface of an unmanned vessel and its operator. The interface contains manual controls for the course and speed of the vessel by regulating the angle of the rudder blade shift and the speed of rotation of the propeller shaft, an automatic system for keeping the vessel on a given trajectory for the purpose of navigating the vessel in automatic and manual modes. The interface comprises a system for obtaining filtration, storing the required kinematic and navigation data for identifying mathematical models of the vessel’s m

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Fokin, G. A., and D. B. Volgushev. "Development of SDR-based network positioning technology. LTE reference signals reception and processing validation." Herald of the Siberian State University of Telecommunications and Information Science 17, no. 3 (2023): 23–33. http://dx.doi.org/10.55648/1998-6920-2023-17-3-23-33.

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Introduction. The positioning of devices according to the base stations reference signals of LTE cellular radio networks deployed everywhere is an important area of research and development that is in demand due to dense urban development with unreliable signal reception from global navigation satellite systems. The instrument for experimental approbation of technical solutions is the software and hardware of the SDR software defined radio technology. This work continues the study on the use of SDR technology for network positioning problems in terms of the experimental testing of the device f

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Glushankov, Ye I., and V. I. Tsarik. "Direct Adaption Methods for Linear and Circular Antenna Arrays." Journal of the Russian Universities. Radioelectronics 26, no. 1 (2023): 6–16. http://dx.doi.org/10.32603/1993-8985-2023-26-1-6-16.

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Introduction. The mitigation of interferences that degrade the performance of navigation systems constitutes one of the most significant problems of contemporary satellite navigation. This problem is conventionally solved using digital adaptive space filters. Depending on a particular radio technical system, the mathematical description of digital signal processing methods may involve specific calculation structures implemented using specific calculation algorithms. For example, the use of centrosymmetric linear and circular antenna arrays in a radio navigation system allows the description of

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Lavrenteva, Elena. "Features of training of marine ship radio specialists." SHS Web of Conferences 137 (2022): 01015. http://dx.doi.org/10.1051/shsconf/202213701015.

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The article discusses the features of training radio specialists for sea transport, taking into account international and national requirements for the qualifications of seafarers. It is emphasized that only persons who have diplomas and qualification certificates of the established form are allowed to occupy the positions of ship’s crew members. As part of the study, qualification documents were systematized for a GMDSS limited area operator, GMDSS operator, GMDSS second class radio electronics, radiotelephone operator and GMDSS first class radio electronics. The areas, types and tasks of the

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Xing, Jin, Baoguo Yu, Dongkai Yang, et al. "A Real-Time GNSS-R System for Monitoring Sea Surface Wind Speed and Significant Wave Height." Sensors 22, no. 10 (2022): 3795. http://dx.doi.org/10.3390/s22103795.

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This paper presents a monitoring system based on Global Navigation Satellite System (GNSS) reflected signals to provide real-time observations of sea conditions. Instead of a computer, the system uses a custom-built hardware platform that incorporates Radio Frequency (RF), Field Programmable Gate Array (FPGA), Digital Signal Processing (DSP), and Raspberry Pi for real-time signal processing. The suggested structure completes the navigation signal’s positioning as well as the reflected signal’s feature extraction. Field tests are conducted to confirm the effectiveness of the system and the retr

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S. Mikhailov, M., E. S. Malevich, and V. A. Permyakov. "Modeling of Radio-wave Propagation in Forest by the Method of Parabolic Equation." International Journal of Engineering & Technology 7, no. 2.23 (2018): 111. http://dx.doi.org/10.14419/ijet.v7i2.23.11895.

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The influence of forests on the propagation of radio waves is an actual topic of research stimulated by practical tasks related to the operation of various types of communication, radar, radio navigation, geodesy, and remote sensing of the earth's surface. The dependence of the electric field strength modulus of the source above the ground surface is studied in the presence of an obstacle in the form of a forest massif. The main attention is paid to the analysis of the field within the forest with various parameters and forms of forest canopy. A new approach to the task is proposed for the for

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Buszman, Krystian, and Małgorzata Gloza. "Detection of Floating Objects Based on Hydroacoustic and Hydrodynamic Pressure Measurements in the Coastal Zone." Polish Maritime Research 27, no. 2 (2020): 168–75. http://dx.doi.org/10.2478/pomr-2020-0038.

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AbstractThe development of coastal infrastructure and related maritime transport necessitatesthe intensification of vessel traffic monitoring. Navigation systems used in this research are traditionally based on the information transmitted by radio waves. Marine traffic safety requires constant supervision carried out by dedicated systems, the operation of which may be limitedby difficult environmental conditions. The possibilities of supporting navigation systems with underwater observation systems are explored here. The research was carried out using an underwater measurement system. Local di

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Rymarczyk, Tomasz, Przemysław Adamkiewicz, Jakub Szumowski, Konrad Niderla, Łukasz Gołąbek, and Jan Sikora. "CONCEPT OF DETECTION SYSTEM TO LOCALIZE INSIDE CLOSED AREA BY RADIO TOMOGRAPHIC IMAGING." Informatics Control Measurement in Economy and Environment Protection 7, no. 1 (2017): 92–95. http://dx.doi.org/10.5604/01.3001.0010.4592.

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. System for navigation and localization inside buildings will determine man's location in confined spaces with level of accuracy never yet achieved. System's operation will be mainly based on Bluetooth signals in accordance with the Beacon standard. A worldwide innovation will be the use of Radio Tomographic Imaging (RTI). This technology will enable tracking of moving objects by image reconstruction based on changes of electromagnetic field signal strength (RSS).

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Michałowska, Joanna, Jarosław Pytka, Arkadiusz Tofil, Piotr Krupski, and Łukasz Puzio. "Assessment of Training Aircraft Crew Exposure to Electromagnetic Fields Caused by Radio Navigation Devices." Energies 14, no. 1 (2021): 254. http://dx.doi.org/10.3390/en14010254.

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The paper depicts research concerning the value of the electric component of the electromagnetic (EM) energy determined by the NHT3DL meter by Microrad with the 01E measuring probe during a number of flights made by Aero AT-3 R100, Cessna C172, and Tecnam P2006T fixed wing aircrafts and a Robinson R44 Raven helicopter. The point of reference for the recorded measurement was the normative limits of the electromagnetic field (EMF), which can influence a pilot in the course of a flight. Selected studies of the maximum value recorded by the meter was E = 10.66 V/m when landing at an airfield equip

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Guan, Gui Xia, Yu Zhang Han, Min Hua Wu, and Jian Guo Han. "On Anti-Noise-Algorithm of Optical-Polarization-Sensing Localization." Applied Mechanics and Materials 190-191 (July 2012): 126–32. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.126.

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the noise problem met during sensing-measurement hasn’t been adequately discussed. In this paper, the calculation errors caused by the noises are demonstrated. A practical optical sensing-localization algorithm based on specially organized Genetic Algorithm is proposed, and application-test experiments of this algorithm are described. Moreover, a parallel-operation scheme suited for Cloud-Computing supporting is introduced. Developments of the algorithm mentioned above provide an effective approach for the rapidly growing field, independent-localization, which would benefit the fields such as

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Dmitriev, Alexandr K., Alexander P. Karpik, Alexsander S. Tolstikov, et al. "Measuring the gravitational frequency shift in a hydrogen clock when transmitting a signal via optical and radio frequency communication channels." Analysis and data processing systems, no. 4 (December 27, 2024): 59–77. https://doi.org/10.17212/2782-2001-2024-4-59-77.

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A scheme for measuring the gravitational frequency shift of hydrogen clocks during their movement between two points located at different orthometric altidudes with simultaneous signal transmission via radio and fiber-optic communication lines has been implemented. Practical interest in studying the gravitational frequency shift of quantum standards is associated with the need to take it into account to improve accuracy in navigation satellite systems. Such measurements were performed using a space synchronization channel using signals from global navigation satellite systems. This became espe

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Holland, Richard A., and Barbara Helm. "A strong magnetic pulse affects the precision of departure direction of naturally migrating adult but not juvenile birds." Journal of The Royal Society Interface 10, no. 81 (2013): 20121047. http://dx.doi.org/10.1098/rsif.2012.1047.

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The mechanisms by which migratory birds achieve their often spectacular navigational performance are still largely unclear, but perception of cues from the Earth's magnetic field is thought to play a role. Birds that possess migratory experience can use map-based navigation, which may involve a receptor that uses ferrimagnetic material for detecting gradients in the magnetic field. Such a mechanism can be experimentally disrupted by applying a strong magnetic pulse that re-magnetizes ferrimagnetic materials. In captivity, this treatment indeed affected bearings of adult but not of naive juveni

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Vijay, Bhat. "AIRCRAFT MAINTENANCE ENGINEERING A talk with an expert." ENTECH 1, no. 2 (2023): 16–17. https://doi.org/10.5281/zenodo.14633711.

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What is the field of Aircraft Maintenance Engineering?Aircraft Maintenance Engineer (AME) keeps an airplane airworthy, which means it is fit to fly safely. To do this, they inspect, maintain, and repair the aircraft. Aircraft radio avionics (electronics), navigation, communication, electrical, and mechanical systems. It is a critical aspect of aviation safety, as even a minor malfunction or defect can have serious consequences.

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Rama Rao, P. V. S., S. Gopi Krishna, J. Vara Prasad, S. N. V. S. Prasad, D. S. V. V. D. Prasad, and K. Niranjan. "Geomagnetic storm effects on GPS based navigation." Annales Geophysicae 27, no. 5 (2009): 2101–10. http://dx.doi.org/10.5194/angeo-27-2101-2009.

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Abstract. The energetic events on the sun, solar wind and subsequent effects on the Earth's geomagnetic field and upper atmosphere (ionosphere) comprise space weather. Modern navigation systems that use radio-wave signals, reflecting from or propagating through the ionosphere as a means of determining range or distance, are vulnerable to a variety of effects that can degrade the performance of the navigational systems. In particular, the Global Positioning System (GPS) that uses a constellation of earth orbiting satellites are affected due to the space weather phenomena. Studies made during tw

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Puricer, Kovar, and Barta. "Modernized Solar Radio Spectrograph in the L Band Based on Software Defined Radio." Electronics 8, no. 8 (2019): 861. http://dx.doi.org/10.3390/electronics8080861.

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The paper presents the concept, implementation, and test operation of a modernized solar radio spectrograph for an investigation of the solar emission and solar bursts in radio frequency bands. Besides having a strong diagnostic significance for studying the flare energy release, the solar radio bursts can also cause strong interference for radio communication and navigation systems. The current spectrograph for the Ondrejov observatory (Astronomical Institute of Czech Academy of Sciences) was modernized by using a direct-conversion receiver connected to a field-programmable gate array (FPGA)

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Kartsan, Igor’ N. "Development concept of inter-satellite laser communication." Siberian Aerospace Journal 24, no. 2 (2023): 247–59. http://dx.doi.org/10.31772/2712-8970-2023-24-2-247-259.

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The relevance of this research work is dictated, among other things, by the need to ensure higher requirements for the accuracy characteristics of the navigation field created by spacecraft of the GLONASS navigation system in order to meet the high requirements for the accuracy characteristics of navigation determinations over long intervals of autonomous operation of spacecraft currently put forward by consumers. The presented concept of development uses the latest achievements of laser and radio engineering both to increase the throughput, noise immunity of transmitting information, as well

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Krot, A. M., I. E. Savinykh, and A. S. Shapkin. "Development of algorithms and programs for estimation of electron content and radiotomographic restoration of the electron concentration field in the ionosphere based on radio signals of satellite systems." Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series 61, no. 1 (2025): 47–62. https://doi.org/10.29235/1561-2430-2025-61-1-47-62.

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The processes of scattering, dispersion and absorption accompanying the propagation of an electromagnetic wave lead to the fact that the radio signal slows down and weakens when passing through electron clusters in the ionosphere. The article solves the problem of restoration of the electron concentration field based on ionospheric radiography. The derivation of analytical relationships for determining the total electron content (TEC) in the ionosphere based on radio signals of the global navigation satellite system (GNSS) at two frequencies is considered. The methods for calculating TEC both

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Füllekrug, M., C. Hanuise, and M. Parrot. "Simulating satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds." Atmospheric Chemistry and Physics Discussions 10, no. 10 (2010): 23149–67. http://dx.doi.org/10.5194/acpd-10-23149-2010.

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Abstract. Relativistic electron beams above thunderclouds emit 100 kHz radio waves which illuminate the Earth's atmosphere and near-Earth space. This contribution aims to clarify the physical processes which are relevant for the spatial spreading of the radio wave energy below and above the ionosphere and thereby enables simulating satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds. The simulation uses the DEMETER satellite which observes 100 kHz radio waves from fifty terrestrial Long Range Aid to Navigation (LORAN) transmitters. Their mean lumi

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Füllekrug, M., C. Hanuise, and M. Parrot. "Experimental simulation of satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds." Atmospheric Chemistry and Physics 11, no. 2 (2011): 667–73. http://dx.doi.org/10.5194/acp-11-667-2011.

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Abstract. Relativistic electron beams above thunderclouds emit 100 kHz radio waves which illuminate the Earth's atmosphere and near-Earth space. This contribution aims to clarify the physical processes which are relevant for the spatial spreading of the radio wave energy below and above the ionosphere and thereby enables an experimental simulation of satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds. The simulation uses the DEMETER satellite which observes 100 kHz radio waves from fifty terrestrial Long Range Aid to Navigation (LORAN) transmitte

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Reyes Leiva, Karla Miriam, Milagros Jaén-Vargas, Benito Codina, and José Javier Serrano Olmedo. "Inertial Measurement Unit Sensors in Assistive Technologies for Visually Impaired People, a Review." Sensors 21, no. 14 (2021): 4767. http://dx.doi.org/10.3390/s21144767.

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A diverse array of assistive technologies have been developed to help Visually Impaired People (VIP) face many basic daily autonomy challenges. Inertial measurement unit sensors, on the other hand, have been used for navigation, guidance, and localization but especially for full body motion tracking due to their low cost and miniaturization, which have allowed the estimation of kinematic parameters and biomechanical analysis for different field of applications. The aim of this work was to present a comprehensive approach of assistive technologies for VIP that include inertial sensors as input,

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Jia, Zhi Ge, Zhao Sheng Nie, Wei Wang, Xiao Guan, and Di Jin Wang. "Study the Effect of Radio Interference of the EHV Transmission Line on GNSS Signals." Advanced Materials Research 805-806 (September 2013): 851–54. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.851.

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This work describes the field testing process of Global Navigation Satellite System (GNSS) receiver under 220KV, 500KV UHV transmission line and standard calibration field. Analysis for GNSS data results shows that the radio interference generated by EHV transmission lines have no effect on GNSS receiver internal noise levels and valid GNSS observation rate. Within 50 meters of the EHV transmission lines, the multi-path effects (mp1 and mp2 value) significantly exceeded the normal range and becomes larger with the increase of the voltage .outside 50 meters of the EHV transmission line, the mul

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Nicola, Mario, Gianluca Falco, Ruben Morales Ferre, Elena-Simona Lohan, Alberto de la Fuente, and Emanuela Falletti. "Collaborative Solutions for Interference Management in GNSS-Based Aircraft Navigation." Sensors 20, no. 15 (2020): 4085. http://dx.doi.org/10.3390/s20154085.

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Nowadays, the Global Navigation Satellite Systems (GNSS) technology is not the primary means of navigation for civil aviation and Air Traffic Control, but its role is increasing. Consequently, the vulnerabilities of GNSSs to Radio Frequency Interference, including the dangerous intentional sources of interference (i.e., jamming and spoofing), raise concerns and special attention also in the aviation field. This panorama urges for figuring out effective solutions able to cope with GNSS interference and preserve safety of operations. In the frame of a Single European Sky Air traffic management R

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Barr, R., and K. B. Young. "Omega Navigation in the Shadow of Antarctica." Journal of Navigation 42, no. 2 (1989): 236–47. http://dx.doi.org/10.1017/s0373463300014442.

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1. INTRODUCTION. Very-low-frequency radio waves were used to implement the Omega navigation system because of their low attenuation (2–4 dB/1000 km) when propagating globally in the waveguide formed between the Earth and the ionosphere. However, it became apparent in the early seventies, throughout the period when the majority of the stations of the Omega network were commissioned, that VLF signals propagating over permafrost or glacial ice could suffer anomalously large attenuations, of greater than 20 dB/1000 km, especially during the daytime. In the Northern Hemisphere problems have arisen

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Стародубцев, Сергей, Sergei Starodubtsev, Дмитрий Баишев, et al. "Analyzing solar, cosmic, and geophysical events in September 2017 using SHISRA SB RAS complex observations." Solar-Terrestrial Physics 5, no. 1 (2019): 14–27. http://dx.doi.org/10.12737/stp-51201903.

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We report the results of monitoring of cosmic rays and geomagnetic field along 210 magnetic meridians in Yakutia in the first half of September 2017. The energy spectrum of solar cosmic rays during Ground Level Enhancement in September 10, 2017 is estimated as J=3027E–1.99exp(–E/729 MeV). We present the results of the forecast and complex analysis of the magnetic storm on September 7–9, 2017 with Dst=–124 nT. The forecast lead time is about one day. We examine how the storm affected the electric potential and VLF signal propagation from RSDN-20 radio navigation stations. Irregular Pi3–Pi1 puls

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Стародубцев, Сергей, Sergei Starodubtsev, Дмитрий Баишев, et al. "Analyzing solar, cosmic, and geophysical events in September 2017 using SHISRA SB RAS complex observations." Solnechno-Zemnaya Fizika 5, no. 1 (2019): 17–38. http://dx.doi.org/10.12737/szf-51201903.

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We report the results of monitoring of cosmic rays and geomagnetic field along 210 magnetic meridians in Yakutia in the first half of September 2017. The energy spectrum of solar cosmic rays during Ground Level Enhancement in September 10, 2017 is estimated as J=3027E–1.99exp(–E/729 MeV). We present the results of the forecast and complex analysis of the magnetic storm on September 7–9, 2017 with Dst=–124 nT. The forecast lead time is about one day. We examine how the storm affected the electric potential and VLF signal propagation from RSDN-20 radio navigation stations. Irregular Pi3–Pi1 puls

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Fujimoto, Akiko, Akimasa Yoshikawa, and Akihiro Ikeda. "Global response of Magnetic field and Ionosonde observations to intense solar flares on 6 and 10 September 2017." E3S Web of Conferences 62 (2018): 01007. http://dx.doi.org/10.1051/e3sconf/20186201007.

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Intense X-ray fluxes during solar flares are known to cause enhanced ionization in the Earth’s ionospheric D, E and F region. This sudden change of ionospheric electron density profile is serious problem to radio wave communication and navigation system. The ground magnetograms often record the sudden change in the sunlit hemisphere during the enhanced X-ray flux, due to the sudden increase in the global ionospheric current system caused by the flare-induced enhanced ionospheric conductivity. These geomagnetic field disturbances are known as ‘‘solar flare effects’’ (SFEs) or geomagnetic croche

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Figotin, Alexander. "Analytic theory of coupled-cavity traveling wave tubes." Journal of Mathematical Physics 64, no. 4 (2023): 042705. http://dx.doi.org/10.1063/5.0102701.

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Coupled-cavity traveling wave tube (CCTWT) is a high power microwave vacuum electronic device used to amplify radio frequency signals. CCTWTs have numerous applications, including radar, radio navigation, space communication, television, radio repeaters, and charged particle accelerators. Microwave-generating interactions in CCTWTs take place mostly in coupled resonant cavities positioned periodically along the electron beam axis. Operational features of a CCTWT, particularly the amplification mechanism, are similar to those of a multicavity klystron. We advance here a Lagrangian field theory

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Zakharenko, Vyacheslav V. "COMMISSIONING OF THE RT-32 RADIO TELESCOPE: NEW OPPORTUNITIES FOR DOMESTIC RADIO ASTRONOMY AND SPACE NAVIGATION Transcript of scientific report at the meeting of the Presidium of NAS of Ukraine, November 27, 2020." Visnik Nacional'noi' academii' nauk Ukrai'ni, no. 12 (December 20, 2020): 69–75. http://dx.doi.org/10.15407/visn2020.12.069.

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In November 2020, the main work on the commissioning of the centimeter range radio telescope RT-32, equipped with highly sensitive receiving equipment, which allows simultaneous observation in the range of 6; 3 and 1.35 cm, was completed. This opens wide opportunities for international scientific cooperation in the field of radio astronomy and the return of Ukraine to the world's largest radio interferometric network with ultra-long bases, the European VLBI Network.

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Padullés, R., E. Cardellach, M. de la Torre Juárez, et al. "Atmospheric polarimetric effects on GNSS Radio Occultations: the ROHP-PAZ field campaign." Atmospheric Chemistry and Physics Discussions 15, no. 13 (2015): 18747–85. http://dx.doi.org/10.5194/acpd-15-18747-2015.

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Abstract. This study describes the first experimental observations showing that hydrometeors induce polarimetric signatures in Global Navigation Satellite System (GNSS) signals. This evidence is relevant to the PAZ Low Earth Orbiter, which will test the concept and applications of polarimetric GNSS Radio Occultation (RO) (i.e. ROs obtained with a two-polarization antenna). A ground field campaign was carried out in preparation for PAZ to verify the theoretical sensitivity studies about this concept (Cardellach et al., 2015). The main aim of the campaign is to identify and understand the factor

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Padullés, R., E. Cardellach, M. de la Torre Juárez, et al. "Atmospheric polarimetric effects on GNSS radio occultations: the ROHP-PAZ field campaign." Atmospheric Chemistry and Physics 16, no. 2 (2016): 635–49. http://dx.doi.org/10.5194/acp-16-635-2016.

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Abstract. This study describes the first experimental observations showing that hydrometeors induce polarimetric signatures in global navigation satellite system (GNSS) signals. This evidence is relevant to the PAZ low Earth orbiter, which will test the concept and applications of polarimetric GNSS radio occultation (RO) (i.e. ROs obtained with a dual-polarization antenna). A ground field campaign was carried out in preparation for PAZ to verify the theoretical sensitivity studies on this concept (Cardellach et al., 2015). The main aim of the campaign is to identify and understand the factors

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