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To solve the problem that the Multi-radar Surveillance System for Air Traffic Control System receives too much redundant data at some point, the paper proposes a data reduction algorithm based on Rough Set theory. Traditionally, rough set theory is applied in reduction of attributes and attributes' value. In this paper, we combine Rough Set theory with Information Granulation theory to reduce the...
Under the conditions of the parallel-runway at airports, the impact of the electromagnetic interference caused by an Airbus_A320 with the fuselage parallel to the runway and the tail toward localizer antenna on the localizer beam of the ILS (Instrument Landing System) is analyzed in this paper. Firstly, the model of the electromagnetic environment of the localizer is established, including the localizer...
On the Gaussian white noise environment, based on the TDOA multi-base stations, it is presented in this paper by adding the quantities of base stations, which improving TDOA location precision method. Secondly, multi-base stations distributed situation are discussed in order to analyze the impacts to precision. At last, for the mobile targets in multibase stations, the simulation based on multi-base...
EMI testing is usually hired professional testing the measuring unit. But this method has some detects, such as the high cost, a long period and do not provide the distributing graph of frequency points and position. Using electromagnetic theory, Neumann formulas and Maxwell equations, a general estimate of the value of EMI testing method is presented in this paper. Oscilloscope, HF magnetic ring...
Worldwide air traffic levels are growing at a rate expected to double the current traffic level. In order to control and ensure the aircrafts, most large airport surface have multi-sensors coverage, with not necessarily synchronized sensors, so a data fusion scheme is essential to provide a coherent and stable output. The multi-sensors include radars, VHF data link, and satellites, and form a surveillance...
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