Secondary surveillance radar system for air traffic control
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United States of America Patent
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Jun 27, 2017
Grant Date -
Jun 14, 2012
app pub date -
Jun 10, 2010
filing date -
Jun 12, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention refers to a secondary surveillance radar, referred to hereinafter as SSR, system (1) for air traffic control. The SSR-system (1) comprises a plurality of secondary radar stations (2) and is adapted for determining a location of an air traffic vehicle within the range of coverage of at least some of the secondary radar stations (2) by means of propagation time measurement of data signals (8) transmitted between the secondary radar stations (2) and a transponder (9) of the air traffic vehicle. Each of the secondary radar stations (2) works on a synchronized local time base. In order to provide for a high-precision synchronisation of the radar stations (2) of the SSR system (1) free of clusters, it is suggested that an SSR system's (1) secondary radar station (2) is synchronized depending on the content of synchronisation signals (10) received by the secondary radar station (2) to be synchronized and broadcast by one of the other secondary radar stations (2) of the SSR system (1). Preferably, the content comprises a time of transmission of the synchronisation signal (10).
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