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ATC reporter claims that TRACON's ASR-9 processes inaccurate and false WX returns indicating that level 1 through level 6 WX is in the area, when it is not. Reporter questions the accuracy and reliability of the system.
| Attributes | |
| ACN | 341393 |
| Time | |
| Date | 199607 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : fwa |
| State Reference | IN |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller non radar : 8 controller radar : 1 |
| ASRS Report | 341393 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
ASR-9 radar at fwa displaying up to level 5 WX that appeared consistent to what actual WX would look like had what was displayed been real WX. Anomalous propagation is a real problem, especially when actual WX is present and creates a safety hazard and increases controller workload.
Original NASA ASRS Text
Title: ATC RPTR CLAIMS THAT TRACON'S ASR-9 PROCESSES INACCURATE AND FALSE WX RETURNS INDICATING THAT LEVEL 1 THROUGH LEVEL 6 WX IS IN THE AREA, WHEN IT IS NOT. RPTR QUESTIONS THE ACCURACY AND RELIABILITY OF THE SYS.
Narrative: ASR-9 RADAR AT FWA DISPLAYING UP TO LEVEL 5 WX THAT APPEARED CONSISTENT TO WHAT ACTUAL WX WOULD LOOK LIKE HAD WHAT WAS DISPLAYED BEEN REAL WX. ANOMALOUS PROPAGATION IS A REAL PROB, ESPECIALLY WHEN ACTUAL WX IS PRESENT AND CREATES A SAFETY HAZARD AND INCREASES CTLR WORKLOAD.
Data retrieved from NASA's ASRS site as of July 2007 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.