B737 captain reported experiencing GPS jamming while in cruise flight.

Attributes
ACN	1646493
Time
Date	201905
Local Time Of Day	0601-1200
Place
Locale Reference	ZLC.ARTCC
State Reference	UT
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 209 Flight Crew Total 4984 Flight Crew Type 4984
Events
Anomaly	Inflight Event / Encounter Other / Unknown

Narrative:

When cruising near garot intersection; we experienced a dual GPS failure and xpdr fail light. This appeared to be GPS jamming. Another aircraft behind us reported the same issue. Center stated that the GPS jamming was not due to commence for 90 more minutes. Unscheduled GPS jamming is a serious safety issue.

Original NASA ASRS Text

Title: B737 Captain reported experiencing GPS jamming while in cruise flight.

Narrative: When cruising near GAROT Intersection; we experienced a dual GPS failure and XPDR FAIL light. This appeared to be GPS jamming. Another aircraft behind us reported the same issue. Center stated that the GPS jamming was not due to commence for 90 more minutes. Unscheduled GPS jamming is a serious safety issue.

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.