Approach controller reported that radar targets were showing rapid erroneous speed readouts and were...

Attributes
ACN	1302497
Time
Date	201510
Local Time Of Day	1201-1800
Place
Locale Reference	DAB.Tower
State Reference	FL
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 6.5
Events
Anomaly	ATC Issue All Types Deviation - Procedural Other / Unknown Deviation - Speed All Types Deviation - Track / Heading All Types

Narrative:

We noticed a problem developing with our radar presentation. Targets were appearing and disappearing at various altitudes and speeds including targets we were working. Aircraft X showed a ground speed of 610 knots at one point as well as target jumps greater than 1NM and rapid heading changes. I instructed the trainee to discontinue lateral separation until the problem could be resolved. Also; false targets appeared and disappeared but I couldn't be certain whether they were actually false or not. I advised the controller in charge who in turn advised tech ops. The problem continued throughout the session.the radar presentation must be fixed. We cannot use radar separation when radar identification is questionable.

Original NASA ASRS Text

Title: Approach Controller reported that radar targets were showing rapid erroneous speed readouts and were jumping around the radar displaying false heading changes.

Narrative: We noticed a problem developing with our radar presentation. Targets were appearing and disappearing at various altitudes and speeds including targets we were working. Aircraft X showed a ground speed of 610 Knots at one point as well as target jumps greater than 1NM and rapid heading changes. I instructed the trainee to discontinue lateral separation until the problem could be resolved. Also; false targets appeared and disappeared but I couldn't be certain whether they were actually false or not. I advised the Controller In Charge who in turn advised Tech Ops. The problem continued throughout the session.The radar presentation must be fixed. We cannot use radar separation when radar identification is questionable.

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.

Approach controller reported that radar targets were showing rapid erroneous speed readouts and were jumping around the radar displaying false heading changes.