Analysis of Quality Indicators in ADS-B Messages

There is lack of available statistical data in the field of quality indicators in ADS-B messages, particularly in Czech airspace. Quality indicators in the ADS-B message define if this message can be used by ATM applications. This article is devoted to the analysis of quality indicators in the ADS-B messages. The data collected in the Czech airspace during six months were analysed. These data were statistically evaluated. The main objective is the statistical evaluation of the data and comparing them with quality requirements in Europe. The article deals with results of the statistics and assessment of the level of quality. Results are satisfactory and similar to the results published by EUROCONTROL and FAA. According to the examined data, 86.42% of them meets the EASA requirements in RAD environment. As ADS-B is not mandatory yet, it is possible to state that these results are satisfying

Broadcasting Monitoring of SSR Transponders in Real Space

The article presents a method that allows achieved the greater completeness of the record during the reconstruction of emitted SSR transponder messages captured by terrestrial receivers. The method is based on a fusion of records from several ground-based receivers. The second part of the article presents and evaluates the results achieved using this method on the network of the low-cost ADS-B receivers in the Department of Air Transport, Czech Technical University in Prague Faculty of Transportation Sciences. Some inevitable phenomena are demonstrated that this measurement method brings

Conflict Alerts in A-SMGCS - Different point of view on evaluating the conflict alert function

This article focuses on issues regarding safety nets within A-SMGCS. A different point of view on evaluating the conflict alert function is presented. The given function is studied within the environment of continuation training of Air Traffic Controllers (ATCO) on 3D Tower simulator. During the exercises, the ATCOs are subjected to RWY incursion situations. The outcome is the proposal of methodology to be used to evaluate the performance of conflict alert function as well as the results of the evaluation itself. Conclusions regarding timing of alerts and performance of the conflict alert function as such are issued at the end

Methodology for Performance Evaluation of Pre Departure Sequencing Tools in terms of A-CDM concept

The article describes the proposed methodology for performance evaluation of Pre-Departure Sequencing tools. Pre-departure management delivers optimal traffic flow to the runway by route planning and accurate taxi time forecasts. Firstly, a Pre-Departure Sequencer Start-Up Manager (SUM) used by Air Navigation Services of the Czech Republic (ANS CZ) at Vaclav Havel Airport Prague (LKPR) is mentioned. The main parts deal with the proposed methodology for performance evaluation of Start-Up Manager. The methodology uses several indicators to evaluate the performance. The methodology utilizes time milestones introduced in Airport Collaborative Decision Making (A-CDM) concept. It focuses especially on aircraft pre-departure sequencing processes. Methodology was tested on the Start-Up Manager used by Air Navigation Services (ANS) of the Czech Republic at Vaclav Havel Airport Prague (LKPR). Achieved performance results and its credibility in accordance with the proposed methodology are presented and discussed in the final part of this paper

Evaluation of Alternative Navigation, Positioning and Timing Systems Based on Their Performance and Additional Characteristics

The aim of this paper is to provide performance assessment of Alternative Navigation Positioning and Timing (APNT) systems considered possible GNSS backup in European region. The performance of the APNT systems is assessed based on their performance characteristics such as accuracy, integrity, and by additional beneficial abilities, that could help by implementation or could provide different added value in terms of solving certain issues in the Communication, Navigation and Surveillance (CNS) domain

The Testing of MLAT Method Application by means of Usage low-cost ADS-B Receivers

The paper describes the process and results achieved during the measurement which was realized with the aim of identify an applicability of MLAT (Multilateration) method by means of using so-called “low-cost” ADS-B receivers. In terms of measurement, ADS-B receivers without GPS time synchronization module was utilized thus specific time synchronization method was required to implement.</span

Activities for 1030/1090 MHz Spectrum Saturation Alleviation

The paper describes the danger of continuing inevitable growing of transmissions on 1030/1090 MHz RF band and actual efforts for alleviation of RF pollution in the light of development of new technologies

Data evaluation of BDS registers from airborne transponders

The purpose of this article is the evaluation of data from BDS registers of aircraft transponders with the focus to calculate wind speed and wind direction. First part of this article focusses on BDS registers and method of calculating wind values from data of secondary surveillance radars obtained from Air Navigation Services of the Czech Republic. Evaluation and comparison of the calculated data with the real values of the wind is stated in the second part of the article.</span

The Testing of MLAT Method Application by means of Usage low-cost ADS-B Receivers

The paper describes the process and results achieved during the measurement which was realized with the aim of identify an applicability of MLAT (Multilateration) method by means of using so-called “low-cost” ADS-B receivers. In terms of measurement, ADS-B receivers without GPS time synchronization module was utilized thus specific time synchronization method was required to implement.</span

Activities for 1030/1090 MHz Spectrum Saturation Alleviation

The paper describes the danger of continuing inevitable growing of transmissions on 1030/1090 MHz RF band and actual efforts for alleviation of RF pollution in the light of development of new technologies