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Dab controller reports of erroneous targets appearing in front of traffic being worked with different transponder codes at each hit of the radar.
| Attributes | |
| ACN | 1187891 |
| Time | |
| Date | 201407 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | DAB.Airport |
| State Reference | FL |
| Aircraft 1 | |
| Make Model Name | Cessna 210 Centurion / Turbo Centurion 210C 210D |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft Low Wing 1 Eng Retractable Gear |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 5 |
| Events | |
| Anomaly | ATC Issue All Types |
Narrative:
Aircraft X was level at 090 and aircraft Y was climbing from 050 to 070; both in the same area. The conflict alert went off and I saw traffic in front of aircraft X indicating 090 and 20 KTS faster displaying a unique transponder code. I issued traffic to aircraft X who did not have the traffic in sight. The traffic seemed to disappear and reappear in different relative positions to aircraft X (12 o'clock; 3 o'clock; 9 o'clock) and the transponder codes were different each time. The codes being displayed were different from any other aircraft I was working including pending aircraft in my strip bay. Eventually the traffic disappeared and did not return. I was using fusion during the entire event.I think this is an issue with our surveillance system; but I don't know which component (stars; ASR; etc.).
Original NASA ASRS Text
Title: DAB Controller reports of erroneous targets appearing in front of traffic being worked with different transponder codes at each hit of the radar.
Narrative: Aircraft X was level at 090 and Aircraft Y was climbing from 050 to 070; both in the same area. The Conflict Alert went off and I saw traffic in front of Aircraft X indicating 090 and 20 KTS faster displaying a unique transponder code. I issued traffic to Aircraft X who did not have the traffic in sight. The traffic seemed to disappear and reappear in different relative positions to Aircraft X (12 o'clock; 3 o'clock; 9 o'clock) and the transponder codes were different each time. The codes being displayed were different from any other aircraft I was working including pending aircraft in my strip bay. Eventually the traffic disappeared and did not return. I was using FUSION during the entire event.I think this is an issue with our surveillance system; but I don't know which component (STARS; ASR; etc.).
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.