Publikace

informace pocházejí z univerzitní databáze V3S

Autoři:
Publikováno:
2024, New Trends in Civil Aviation: Proceedings of the 24th International Conference on New Trends in Civil Aviation 2024, Praha, České vysoké učení technické v Praze), p. 19-25), ISBN 978-80-01-07181-6, ISSN 2694-7854
Anotace:
Automatic Dependent Surveillance - Broadcast (ADS-B) is one of the most widely used surveillance technologies in aviation. The data from ADS-Bare extensively used for commercial and research purposes. Incorrect positional messages present in the data could lead to wrong or misleading scientific conclusions. The paper presents two different methods for ADS-B position outlier detection. First, the use of Density Based Spatial Clustering of Applications with Noise algorithm is proposed. Second, the use of the Interacting Multiple Model algorithm is proposed, where the statistical distribution of the innovation is as a means for outlier detection. Both algorithms are compared on a large publicly available data set consisting of 513 million messages. The advantages and disadvantages of both of the algorithms are discussed and recommendations for their use are provided. The results indicate that up to 0.75 % of ADS-B Airborne Position Messages should be discarded.
DOI:
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Ing. Petr Lukeš; Kulmon, P.
Publikováno:
2023, 2023 24th International Radar Symposium (IRS), Piscataway, Institute of Electrical and Electronics Engineers), ISBN 978-3-944976-34-1, ISSN 2155-5753
Anotace:
The evaluation of target tracking algorithms is highly dependent on the available data. Ideally recordings from various situations of interest, ranging from low manoeuvring targets up to closely spaced and highly manoeuvring targets, should be evaluated. Obtaining such data sets is difficult, costly and sometimes could not be done for security reasons. In this paper we show the initial result of a data driven approach for target kinematic behaviour modelling. A method based on GAN is presented and trained on more than 33 000 aircrafts. The results are discussed, highlighting the contributions and drawbacks of the current implementation. The presented method could serve as an alternative to model based trajectory generation with the advantages of maintaining the temporal manoeuvre correlations. As proposed, the methodology could also be used for data anonymization which would allow to build data driven models even from restricted data.
DOI:
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Kulmon, P.; Ing. Petr Lukeš
Publikováno:
2022, International Conference on Radar Systems (RADAR 2022), Stevenage, Herts, The Institution of Engineering and Technology (IET)), p. 714-718), ISBN 978-1-83953-777-6, ISSN 2732-4494
Anotace:
In this paper, a recent novel Bayesian deghosting algorithm for the Multi-Static Primary Surveillance Radar (MSPSR) systems is analysed. The previous research was primarily concerned with the verification of the approach based on the Indian Buffet Process (IBP) and its usage as the apriori probability distribution for the bistatic-to-cartesian association matrix. In this paper, the degree of dependence of the algorithm performance on the specific choice of the hyperparameters is explored and assessed. Together with the analysis, the methodology for the choice of hyperparameters without any apriori knowledge is developed. All analyses are verified using simulations derived from a realistic MSPSR system. The results obtained suggest a rather low sensitivity of the association results concerning the hyperparameters computation method.
DOI:
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Bc. Michael Matejovie; doc. Ing. Jakub Hospodka, Ph.D.; Ing. Stanislav Pleninger, Ph.D.; Ing. Petr Lukeš; Ing. Terézia Pilmannová, MBA
Publikováno:
2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 69-73), ISBN 978-1-6654-5190-1
Anotace:
This paper dissertates about utilization of Automatic Dependent Surveillance-Broadcast (ADS-B) parameters Navigation Accuracy Category for Position (NACp) and Navigation Integrity Category (NIC) for possible identification of Global Navigation Satellite Systems (GNSS) jamming. GNSS jamming poses a high-security risk not only for aviation. ADS-B transmitted from most of the aircraft brings a possibility to use the ADS-B to identify the presence of GNSS jamming. Therefore, aircraft are used as detectors to identify jamming presence with wide area coverage. A method for GNSS jamming detection using the correlation of NACp and NIC ADS-B parameters is presented in this article. The results of applying this method on multiple real datasets are shown and discussed.
DOI:
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Publikováno:
2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 51-55), ISBN 978-80-01-06985-1, ISSN 2694-7854
Anotace:
Global Navigation Satellite Systems (GNSS) are a key source of position, navigation, and timing in safety critical domains, including aviation. Due to GNSS low signal power when received on Earth's surface the signal is very susceptible to unintentional and intentional jamming. To assess the criticality of GNSS jamming, a long-term monitoring campaign was carried out near airport infrastructure and near highways using verified GNSS jamming detectors on the L1 frequency. The results show a frequent occurrence of GNSS jamming near airport infrastructure due to the illegal use of jammers on board of road traffic with more than 6 events per day with expected impact on GNSS signal reception. The results and their importance and implications are discussed. The results also show a very disturbing occurrence of a wide-area GPS jamming of the L1 frequency detected throughout Europe possibly impacting more than 1 million kilometers squared of area. The impact and possible causes of this phenomenon are discussed.
DOI:
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Petr Lukeš; Říha, M.
Publikováno:
2021, IET Radar, Sonar and Navigation, 15 (10), p. 1181-1194), ISSN 1751-8784
Anotace:
The issue of aircraft tracking using passive sensors with poor measurement precision and a variable update rate is investigated. First, the need for a time-dependent Markov chain transition matrix for the Interacting Multiple Model (IMM) is thoroughly evaluated using simulation and real data from an experimental multilateration system. Three different methods for computing the time-dependent matrix are compared, showing their superiority for highly aperiodic sensors. Second, the Variable Structure Interacting Multiple Model (VS-IMM) for passive sensors with poor geometry is proposed, in which the mode set update is based on local dilution of precision or distance root mean square error. The performance of the estimator is compared with the IMM using real data. The VS-IMM results in the best performance for areas of both high and low measurement precision.
DOI:
Typ:
Článek v periodiku excerpovaném SCI Expanded

Autoři:
Publikováno:
2020, Transportation Research Procedia, Linz, Elsevier BV), p. 190-198), ISSN 2352-1465
Anotace:
The GNSS outage is regarded as a significant threat for the seamless air traffic operation not only above the mainland, but it may also affect the navigation performance over oceanic or remote areas. This research project deals with design and evaluation of two methods extending the coverage of terrestrial alternative navigation solutions by using technologies based on the current navigation and surveillance systems. Both solutions are represented by models enhancing the transmitted signal from ground stations (GS) by forwarding the signal, respectively, by exchange of necessary information among aircraft in surroundings beyond the line of sight of the GS. Afterwards, the Monte Carlo simulation has been applied for evaluation of position error of both proposed solutions. In conclusion, the suitability of the evaluated models is considered in relation to the current navigation means used in the remote areas.
DOI:
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Ing. Stanislav Pleninger, Ph.D.; doc. Ing. Jakub Hospodka, Ph.D.; Ing. Terézia Pilmannová, MBA; Ing. Tereza Topková, Ph.D.; Ing. Petr Lukeš; Ing. Jakub Steiner; doc. Ing. Jakub Kraus, Ph.D.
Publikováno:
2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 123-128), ISBN 978-80-01-06726-0, ISSN 2694-7854
Anotace:
The ADS-B system is one of the key pillars of the future surveillance infrastructure, where the provided position information is predominantly dependent on the availability and quality of GNSS position information. The article presents the findings obtained during a real-time measurement in which the GNSS receiver within the multi-mode receiver (MMR) on the B737 MAX was interfered. In addition to identifying the power level sufficient to disable the GNSS receiver on this aircraft, the article further describes the behavior of the ADS-B system under jamming conditions. The experiment was performed on the ground, i.e., both the aircraft and the jammer were stationary during all phases of measurement.
DOI:
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Ing. Petr Lukeš; Ing. Tereza Topková, Ph.D.; Vlček, T.; Ing. Stanislav Pleninger, Ph.D.
Publikováno:
2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 9-15), ISBN 978-80-01-06726-0, ISSN 2694-7854
Anotace:
With the increasing dependency on the Global Navigation Satellite System (GNSS) for navigation and surveillance, aviation is focusing on mitigation of threats caused by a possible system unavailability due to jamming or spoofing. This research deals with pattern recognition of the time evolution of quality indicators in transmitted Automatic Dependent Surveillance - Broadcast (ADS-B) messages during GNSS jamming in non jammed data over Central Europe. An evaluation of the quality indicators from all messages within a one month interval is presented. A practical jamming experiment was done to determine how the quality indicators are changing during a jamming presence. Afterwards, the results of the experiment are used as a foundation for the proposed jamming detection technique using ADS-B data based on pattern recognition and cluster analysis. A natural presence of a quality indicators variability is proven in the data using these methods, similar to the indicators variability during GNSS jamming.
DOI:
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Ing. Jakub Nosek, Ph.D.; Ing. Petr Lukeš
Publikováno:
2019, MAD - Magazine of Aviation Development, 7 (4), p. 12-14), ISSN 1805-7578
Anotace:
AFIS officers are mandated by the Czech Annex L11, Appendix N regulation to record specified information about all landings and take-offs at AFIS airports. This task is currently being done manually by the officers. The paper describes a possible usage of a software tool which could help Aerodrome Flight Information Service officers to perform their duties more efficiently. It is focused on the solution to, in full measure, record this mandatory information automatically without the officers’ intervention. The result of the study is a set of information that could be recorded automatically with suggested approach of how this can be performed.
DOI:
Typ:
Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:
Ing. Tomáš Lipták, Ph.D.; Ing. Petr Lukeš; Ing. Stanislav Pleninger, Ph.D.
Publikováno:
2018, TRANSPORT MEANS 2018 - PROCEEDINGS OF THE 22nd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 391-394), ISSN 1822-296X
Anotace:
An aeronautical surveillance infrastructure in technologically developed regions is primarily based on cooperative systems. A core part of the infrastructure consists of Secondary Surveillance Radars (SSR), Multilateration systems (MLAT) and an Automatic Dependent Surveillance-Broadcast (ADS-B). Due to the inherent nature of the cooperative technologies, the on-board transponders and the 1030/1090 MHz frequencies are shared among all the systems. The collective usage combined with growing air traffic and the necessity for extracting downlink airborne parameters using Mode S result in large demands on RF spectrum and on the on-board equipment. The increasing occupancy goes hand in hand with increasing probability of an interrogation interference. The prospect of a surveillance information loss highlights the need to analyse and possibly predict the behaviour of 1030/1090 MHz environment by air navigation service providers. This paper focuses on a plausibility of approximating the SSR Mode S (selective) interrogation sequences in multi-radar coverage to a Pure Aloha protocol which incorporates a mutual independence of radar systems and an interrogation retransmission. The feasibility of the approximation is evaluated using simulation of a typical interrogation sequence while analysing the Mode S transponder throughput. The Pure Aloha model parameters to fit the selected interrogation sequence are devised.
Typ:
Stať ve sborníku z prestižní konf.