People
Ing. Petr Jonáš, Ph.D.

2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 63-67), ISBN 978-80-01-06726-0, ISSN 2694-7854

The number of Small Unmanned Aircraft Systems (SUAS) has greatly increased in recent years. And it is expected that this number will continue increasing in the future. The SUAS may be operated in proximity of aerial vehicles (including aircraft) and it may be necessary to detect them electronically. One possibility is to equip SUAS with Automatic Dependent Surveillance – Broadcast (ADS-B) surveillance system operating on 1090 MHz frequency. The purpose of this study is to investigate the impact of SUAS ADS-B 1090 transmissions on the reception of an aircraft ADS-B Extended Squitter by an ADS-B ground station. The systems being considered operate at low altitudes, typically under 500 ft above ground level (AGL). We found that high number of SUAS equipped with ADS-B flying close to ground ADS-B sensors can have significant impact on the operational range up to 40%.

2019, Proceedings of 2019 International Conference on Military Technologies (ICMT), Brno, Univerzita Obrany), ISBN 978-1-7281-4593-8

The modern day air traffic management system relies heavily on GNSS signals. The GNSS systems are not only used for positioning and navigation, but they also provide vital time reference used in communication and surveillance systems. The availability of GNSS is vital for the overall CNS environment. Loss of this service due to intentional or unintentional interference has a detrimental impact on air traffic operation. It is therefore desirable to be able to inform air traffic controllers and pilots about such occurrence, to define its geographical area of impact and to try to find and remove the source of interference as quickly as possible. This article looks at ways of interference detection and possible ways of interference source localization using the ADS-B system.

2019, 2019 International Conference on Computer Science, Communications and Big Data, Lancaster, Pennsylvania, DEStech Publications, Inc.), p. 65-69), ISBN 978-1-60595-626-8, ISSN 2475-8841

The surveillance information are key data for all air navigation service providers which are responsible for the safety of the air passengers and the efficiency of Air Traffic Management system. In this paper, we have focused on the analysis of a protocol used to carry the surveillance information from the sensor to the ATC centre as well as amongst variety of ATM applications inside the ATC centre. As the original ASTERIX protocol has been developed without any security mechanism, it constitutes a major vulnerability. This deficiency has been acknowledged by the AMG (ASTERIX management group) which is seeking a remedy. In this article we describe a proposal to implement the security features into the protocol.

2018, 2018 IEEE/ION Position, Location and Navigation Symposium (PLANS), Fairfax, Institute of Navigation), p. 1181-1190), ISBN 978-1-5386-1647-5, ISSN 2153-3598

GBAS is a Ground Based Augmentation System for GNSS that provides precision approach operations to aircraft. The main vulnerability of this system is the ranging error caused by the ionospheric propagation delay, which is mitigated by the development of local ionosphere threat model. EUROCONTROL launched a project in 2012 to develop such a model for Europe in support of current and future GBAS implementations. First, the appropriate GNSS data have been selected and retrieved. Based on existing networks of ground receivers, several clusters of GNSS ground receivers have been selected. This selection process was a trade-off between a reasonable number of ground stations on one side, and the need to cover the European latitudes but also to have the smallest distances between ground stations on the other side. As a result, 14 clusters were selected, located in the Canary Island (Spain, 28°N), Madrid (Spain, 40°N), Corsica (France, 42°N), Toulouse (France, 43°N), Friuli region (Italy, 46°N), Paris (France, 48°N), Prague (Czech Republic, 50°N), London (United Kingdom, 51°N), Hamburg (Germany, 53°N), Malmö (Sweden, 55°N), Göteborg (Sweden, 57°N), Stockholm (Sweden, 59°N), Lulea (Sweden, 65°N), and Gällivare (Sweden, 67°N). Data were retrieved from a total of 215 ground receivers and from October 8th, 2012 to March, 31th, 2016. Second, a dedicated MATLAB-based tool initially developed by Stanford to define the CONUS threat model and provided to EUROCONTROL by the FAA has been used to process the GNSS data...

2018, Zvyšovanie bezpečnosti a kvality v civilnom letectve 2018, Žilina, Faculty of Opearation and Economics of Transport and Communications, UNIZA), ISBN 978-80-554-1418-8

This article is published as part of basic research in line with doctoral dissertation of the first author. The purpose of the article is to introduce the basics of software defined radios - SDRs and their possibilities in practical applications they can be used for. Software defined radios have become a very attractive alternative to classical analogue radios due to their flexibility, reconfigurability, stability and last but not least are latively low price tag with ever improving results. Such device has a wide variety of use, from demonstration of radio waves in a learning process, to simulation of real radio communication signals and transmission, to analysis of various radio surveillance equipment in aviation. As it is explained further in the article, wide range of applications can prof it from such setup. This information may be useful for everyone who wants to implement any kind of RF analysis or simulation. When the use of SDR is considered, the first step of implementation is to map the current situation, different possibilities, as well as the system requirements.

2018, INTERNATIONAL CONFERENCE ON TRAFFIC AND TRANSPORT ENGINEERING - proceedings, Belgrade, City Net Scientific Research Center Ltd. Belgrade), p. 1-6), ISBN 978-86-916153-4-5

The 21st century brings new trends in Non-cooperative Surveillance technologies. One of them is the MSPSR technology, which is being widely discussed and just about to be operat ionally released. ANSPs have a real interest in MSPSR technology as it can be one of the possible solutions to the increasing pressure on the continued operation of existing PSRs. From an ANSP’s perspect ive it is not possible to rely just on the cooperative technologies. There is a need to have at least one non-cooperative back up system due to multiple reasons, such as transponder failures or non-cooperative aircraft . MSPSR can bring 3D surveillance, better precision, coverage in mount ainous areas and wind-mill regions, detection of UAV and more. This all leads to importance of evaluation and testing of this technology. As it is very difficult to obtain an MSPSR recording for general scientific community, EUROCONTROL in cooperation with University of Zilina (Air Transport Department) did their research based on current interoperability of SASS-C tool with MSP SR data and its data simulation. The simulation of the pure MSPSR non cooperative data is based on modification of a WAM recording. Such a recording then can be used for the future analysis. The guide is a partial outcome of the research done on the independent non-cooperative sensors in EUROCONTROL.