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  5. Methods to increase accuracy of the coordinates of air object through the multi receivers ADS-B system use

Methods to increase accuracy of the coordinates of air object through the multi receivers ADS-B system use

A. Fedorov, T. Kalimulin, O. Serdiuk, G. Hudov
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Description: The article analyzes the possibility of using a multilateration system in cooperation with existing radar facilities during the conduct of radar surveillance of airspace. Possible variants of detection, determination of coordinates and tracking of air objects that seek to be undetected or to lead mimicry are given. The information possibilities of the ADS-B receivers are reviewed. The directions of consolidation of the capabilities of the multilateration system and information from radar facilities are determined. The possibilities of obtaining data from the ADS-B receivers in radio engineering units and the technical means of determining such information are considered. The methods used are: methods for determining the coordinates of the air object, the distance-range method, the methods of passive radar, methods for determining the coordinates of the air object using the information of satellite navigation systems. The principles of the Time Difference of Arrival method (difference-ranging method) is considered, which is the basis of using of the ADS-B receivers in determining the coordinates of air objects. The factors that influence the accuracy of determining the coordinates of an air object are shown. In conducting calculations, the geometry of the ADS-B re-ceivers placement, the location of the airborne object relative to ADS-B receivers, the amount of ADS-B receivers use, and the accuracy of the airborne object coordinate system on the flight path are taken into account. The calculations were made taking into account the location of the ASD-B receivers in the area of radio-technical units location. Features and limitations of using the infor-mation from the multilateration system are considered. As receivers of the multilateration system, proposed to use the ADS-B system receivers. The existing problems of airspace control are identified and solutions are offered. The results obtained with regard to the improvement of the accuracy of trajectory measurements and the reduction of the squared error of the calculation of the coordinates of the air facility in the application of the multipositional location ADS-B receivers.


Keywords: radars, control point, ADS-B, recovers, information source, air situation, dependent observation, independent observation, airspace, airspace control, coordinates

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Reference:
 Fedorov, A.V., Kalimulin, T.M., Serdiuk, O.V. and Khudov, H.V. (2019), “Metod pidvyshchennia tochnosti vyznachennia koordynat povitrianoho obiekta za rakhunok zastosuvannia bahatopozytsiinoi systemy pryimachiv ADS-B” [Methods to increase accuracy of the coordinates of air object through the multi receivers ADS-B system use], Science and Technology of the Air Force of Ukraine, No. 1(34), pp. 64-69. https://doi.org/10.30748/nitps.2019.34.09.