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Significant WX caused both channels of roc's ASR-9 to alarm. Alarm anomaly discontinued after system changed to circular polarization.
| Attributes | |
| ACN | 341667 |
| Time | |
| Date | 199607 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : roc |
| State Reference | NY |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 4 |
| ASRS Report | 341667 |
| Person 2 | |
| Affiliation | government : faa |
| Function | oversight : supervisor |
| Qualification | controller : radar |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Roc ASR9 alarms on the 'B' channel light, switched to 'a' channel. Maintenance technicians notified. 'A' channel alarms. Technicians observing monitor panel, radar targets appeared normal. Technicians advised to continue to use 'a' channel as long as possible. Significant WX in area. Technicians advised alarm was caused by WX overloading radar receiver. Alarm cleared by manually switching polarization from linear to circular.
Original NASA ASRS Text
Title: SIGNIFICANT WX CAUSED BOTH CHANNELS OF ROC'S ASR-9 TO ALARM. ALARM ANOMALY DISCONTINUED AFTER SYS CHANGED TO CIRCULAR POLARIZATION.
Narrative: ROC ASR9 ALARMS ON THE 'B' CHANNEL LIGHT, SWITCHED TO 'A' CHANNEL. MAINT TECHNICIANS NOTIFIED. 'A' CHANNEL ALARMS. TECHNICIANS OBSERVING MONITOR PANEL, RADAR TARGETS APPEARED NORMAL. TECHNICIANS ADVISED TO CONTINUE TO USE 'A' CHANNEL AS LONG AS POSSIBLE. SIGNIFICANT WX IN AREA. TECHNICIANS ADVISED ALARM WAS CAUSED BY WX OVERLOADING RADAR RECEIVER. ALARM CLRED BY MANUALLY SWITCHING POLARIZATION FROM LINEAR TO CIRCULAR.
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.