A private pilot notes that his GPS is off for about 1 hour while west of ATR, de.

Attributes
ACN	434684
Time
Date	199904
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : atr.vor
State Reference	DE
Altitude	msl single value : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : miv.tracon
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute airway : v29.airway
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 25 flight time total : 675 flight time type : 650
ASRS Report	434684
Person 2
Affiliation	government : military
Function	controller : approach
Qualification	controller : military
Events
Anomaly	aircraft equipment problem : less severe other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : became reoriented none taken : anomaly accepted
Supplementary
Problem Areas	Navigational Facility Flight Crew Human Performance Aircraft
Primary Problem	Navigational Facility

Narrative:

Loss of GPS signal for at least 1 hour occurred 11 mi west of ATR VOR.

Original NASA ASRS Text

Title: A PVT PLT NOTES THAT HIS GPS IS OFF FOR ABOUT 1 HR WHILE W OF ATR, DE.

Narrative: LOSS OF GPS SIGNAL FOR AT LEAST 1 HR OCCURRED 11 MI W OF ATR VOR.

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.