Tonopah azimuth radar at sector 45-47 shifted 15-20 degrees.

Attributes
ACN	157337
Time
Date	199009
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zlc
State Reference	UT
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc
Route In Use	enroute airway : zlc
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	157337
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	other physical facility

Narrative:

Approximately 8 aircraft in sector. 15020 degree azimuth shift of tonopah radar caused several split targets and erroneous returns. Tracks and beacons moved north by as much as 30 mi. Impossible to use radar for sep. Sector became essentially a non radar situation.

Original NASA ASRS Text

Title: TONOPAH AZIMUTH RADAR AT SECTOR 45-47 SHIFTED 15-20 DEGREES.

Narrative: APPROX 8 ACFT IN SECTOR. 15020 DEG AZIMUTH SHIFT OF TONOPAH RADAR CAUSED SEVERAL SPLIT TARGETS AND ERRONEOUS RETURNS. TRACKS AND BEACONS MOVED N BY AS MUCH AS 30 MI. IMPOSSIBLE TO USE RADAR FOR SEP. SECTOR BECAME ESSENTIALLY A NON RADAR SITUATION.

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.