The FAA is upgrading beacon interrogators on three radars that serve the Washington Center Air Route Traffic Control Center in Leesburg, Va., earlier than planned after "target jumps" began to occur on air traffic controller displays. Aircraft identifications will remain in place, but target blips will disappear from the ATC screen for several radar sweeps, according to the FAA. The initial Leesburg problem was caused by radio frequency interference (RFI) that was investigated but could not ...


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