DOI 10.51955/2312-1327_2023_2_28

Roman O. Arefyev

Oleg N. Skrypnik

Muslim A. Mezhetov

Abstract. The article presents the results of a study of the noise immunity of the ATGM336H multi-system GNSS receiver to the influence of narrow-band interference at the L1 frequency set for one of the systems (GLONASS or GPS). The review of existing works on the study of noise immunity of satellite navigation receivers is carried out. The method of conducting experiments is presented. The simulator CH-3803M was used as a signal source from navigation satellites. The analysis of the results obtained during the experiments for the formulation of narrow-band interference of various capacities via GPS and GLONASS channels is carried out.

Keywords: GPS, GLONASS, dilution of precision, immunity.

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DOI 10.51955/2312-1327_2023_1_118

Alexander P. Plyasovskih

Evgeny A. Rubtsov

Andrey S. Kalintsev

Vladislav Y. Davidenko

Abstract. Proposed the method for confirming ADS-B data based on the analysis of information about the aircraft altitude and atmospheric parameters. To confirm the reliability of ADS-B messages, proposed to compare the geometric height obtained from satellite navigation system data with the height calculated for the real atmosphere (based on information from the meteorological service on pressure and temperature). To implement the proposed methodology, required the following input data: pressure at the level of the weather station, temperature at the level of the weather station and at flight altitudes, and data on geometric and barometric altitudes transmitted in the ADS message. It has been established that the greatest error in the calculations is introduced by the temperature at the aircraft flight altitude. In order to reduce the influence of errors in determining the temperature, proposed to use data from weather balloons. With developed methodology, a calculation was performed using real altitude data transmitted in the ADS-B message and the required data from the meteorological service. Messages received from the ADS-B ground station NS-1A manufactured by JSC VNIIRA, which is installed at the Mezen airfield, were used. The developed methodology is proposed to be used to confirm ADS-B data at regional aerodromes with low flight intensity.

Key words: ADS-B, weather balloon, barometric altitude, geometric altitude, pressure, temperature, Laplace formula, ISA.

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DOI 10.51955/2312-1327_2023_1_77

Muslim A. Mezhetov

Boris V. Lezhankin

Anna I. Tikhova

Ulyana S. Vakhrusheva 

Abstract. The paper considers the use of LoRa technology in the data transfer system for performing aircraft position-fixing by means of the network of multilateration ground stations. The urgency of the problem is that the methods used for transferring data do not meet the requirements for safety and security of the transmitted information so such systems are not protected against unauthorized access. The information transmitted is strategically important for performing air traffic management tasks on the territory of the Russian Federation. Unauthorized access can result in intercepting and spoofing the coordinate information of aircraft location. This is possible only in exceptional circumstances which lead to reduction in flight safety and transition of flight incidents to flight accidents. The security of transmitted information can be improved by applying noise-like signals which ensure better security indexes of transmitted signals and possess higher jamming resistance. A new LoRa technology of transferring data is widespread nowadays. The technology is based on the linear frequency modulation which has been used in radar systems for several decades.  The paper presents the algorithm of operating the multilateration data transfer system and its hardware-in-the-loop simulation implemented as a virtual device.

Key words: Linear frequency modulation, multilateration surveillance system, LoRa technology.

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DOI 10.51955/2312-1327_2023_1_98

Dmitry Vladimirovich Khazanov

Boris Valentinovich Lezhankin

Vyacheslav Vladimirovich Erokhin

Abstract. In civil aviation, an urgent and important task is to provide air traffic participants with uninterrupted radio communication. Satellite communication is a global mobile network covering the entire surface of the Earth, including polar regions, which provides a two-way data and voice communication exchange. An analysis of the principles of functioning of satellite communication systems (SCS) showed that the determination of energy characteristics is of great importance. Energy characteristics in satellite communication channels and the level of interference determine SCS operational capabilities and quality indicators. One of the critical factors that determine the effectiveness of the SCS functioning is the conditions for the propagation and absorption of radio waves, including ionospheric phenomena, which are not yet fully understood, and this determines the research relevance.

This article is devoted to theoretical studies of the ionospheric plasma by the methods of physical kinetics to increase the energy potential of the radio links of a satellite communication system.

Keywords: physical plasma kinetics, energy relations, satellite communication systems, Maxwell distribution function, ionospheric phenomena.

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