ATC equipment problem radar target jump and 80 KT gndspd variation.

Attributes
ACN	297680
Time
Date	199503
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bum
State Reference	MO
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 11
ASRS Report	297680
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
Navigational Aid	Unspecified

Narrative:

Target jumps and gndspd variations up to 80 KTS occur regularly in an approximately area defined as a 60 mi radius from the bum 240 degree radial at 60 mi. This impacts control actions by increasing workload and distracting the controller. A NAS problem report filed in regard to this situation resulted in no change. Callback conversation with reporter revealed the following information: reporter stated the facility response to the NAS problem report was a sort box between 2 radar system and that the controller should not rely on the airspeed shown for separation purposes. Reporter has filed a ucr.

Original NASA ASRS Text

Title: ATC EQUIP PROB RADAR TARGET JUMP AND 80 KT GNDSPD VARIATION.

Narrative: TARGET JUMPS AND GNDSPD VARIATIONS UP TO 80 KTS OCCUR REGULARLY IN AN APPROX AREA DEFINED AS A 60 MI RADIUS FROM THE BUM 240 DEG RADIAL AT 60 MI. THIS IMPACTS CTL ACTIONS BY INCREASING WORKLOAD AND DISTRACTING THE CTLR. A NAS PROB RPT FILED IN REGARD TO THIS SIT RESULTED IN NO CHANGE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE FACILITY RESPONSE TO THE NAS PROB RPT WAS A SORT BOX BTWN 2 RADAR SYS AND THAT THE CTLR SHOULD NOT RELY ON THE AIRSPD SHOWN FOR SEPARATION PURPOSES. RPTR HAS FILED A UCR.

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.