To facilitate the increasing amount of air traffic, current and future decision support tools for air traffic management require an efficient and accurate trajectory prediction. With uncertainty inherent to almost all inputs of a trajectory predictor, the accurate prediction is not a simple task. In this study, Monte Carlo simulations of a ground-based trajectory predictor are performed to estimate the prediction uncertainty up to 20 minutes look-ahead time and to assess the correlation between inputs and prediction errors. Selected inputs are aircraft bank angle, constant calibrated airspeed and Mach number speed settings, vertical speed, temporary level-offs, air temperature, lapse rate, wind, and air traffic control intent. These inputs are provided in the form of their distribution functions obtained from observed data such as surveillance data, weather forecasts, and air traffic controllers' inputs. Simulations are performed for heavy and medium wake turbulence category aircraft. Results indicate that with a 20 minute look-ahead time, when outliers are not considered, along-track errors can reach up to 18 nautical miles, whereas altitude errors can reach up to around 13,000 feet. Cross-track errors in cruise highly depend on the lateral deviations due to ATC instructions, and, in this study, are within 10 nautical miles. Wind conditions, vertical speed, calibrated airspeed, Mach number speed setting, and temporary level-offs are determined to be the most influential inputs.
Для моделювання передачі ADS-B повідомлень за допомогою низькоорбітального супутникового комплексу Iridium у середовищі MATLAB Simulink побудовано модель каналу зв’язку «літак–супутник–наземна станція», яка дозволила дослідити залежності коефіцієнта двійкових помилок від типу кодування/декодування сигналу, співвідношення Eb/N0 та коефіцієнта підсилення супутникового повторювача.
This paper focuses on the performance analysis of aeronautical satellite baseband link including Aircraft Transmitter, Uplink (AWGN channel), Satellite Transponder, Downlink (AWGN channel), and Ground Earth Station (GES) Receiver. Impact of a modulation type (BPSK, QPSK, 8PSK, 16QAM), E b /N 0 , satellite transponder amplifier gain without and with coding on Binary Error Rate (BER) was investigated. Effectiveness of error detection and correction for "Aircraft-to-Satellite-to-Ground" link was analyzed using classic linear block codes, like Hamming"s (7, 4) code.
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