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Controller reporter claims that false targets appear on the ASR-9 radar scope and may be attributed to temperature changes.
| Attributes | |
| ACN | 351768 |
| Time | |
| Date | 199611 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bdl |
| State Reference | CT |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bdl |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 9 |
| ASRS Report | 351768 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
The past 2 days we have had an abnormal number of primary targets throughout the airspace. First they are there, then they are not. It has been windy, and daytime temperatures have fallen. The ASR-9 leaves little room to interpretation false primaries due to the computer generation of the primary targets. This phenomenon increases workload for issuing traffic and then advising when no longer a factor.
Original NASA ASRS Text
Title: CTLR RPTR CLAIMS THAT FALSE TARGETS APPEAR ON THE ASR-9 RADAR SCOPE AND MAY BE ATTRIBUTED TO TEMP CHANGES.
Narrative: THE PAST 2 DAYS WE HAVE HAD AN ABNORMAL NUMBER OF PRIMARY TARGETS THROUGHOUT THE AIRSPACE. FIRST THEY ARE THERE, THEN THEY ARE NOT. IT HAS BEEN WINDY, AND DAYTIME TEMPS HAVE FALLEN. THE ASR-9 LEAVES LITTLE ROOM TO INTERP FALSE PRIMARIES DUE TO THE COMPUTER GENERATION OF THE PRIMARY TARGETS. THIS PHENOMENON INCREASES WORKLOAD FOR ISSUING TFC AND THEN ADVISING WHEN NO LONGER A FACTOR.
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.