Eclipse pilot reported experiencing GPS jamming during cruise that lasted for an hour.

Narrative:

Flying at FL410; I encountered a loss of GPS signal as a result of jamming. On the ATC frequency there were numerous aircraft that were similarly affected. All aircraft had to resort to flying by heading; or an alternative means of navigation. In some cases aircraft had to descend since their ahrs require GPS signals. In my case the disruption to navigation lasted nearly an hour. This extremely frequent jamming of critical GPS navigation is a significant threat to aviation safety. This affects all aircraft and could result in critical altitude changes for aircraft that are required to descend to lower altitude when losing a GPS signal. If can aircraft has to descend to a lower altitude it can have a significant impact on its range and could result in a diversion. Most modern aircraft rely solely on GPS not only for navigation signals in cruise; but also to determine range; fuel remaining; and other critical aspects of flight. In addition this disruption also impact instrument approach procedures. Since the FAA is deprecating vors; ndbs; and associated approaches; we are becoming dependent upon an unreliable navigation system. Imagine an aircraft on an RNAV approach in IMC and it loses the GPS signal. Not only could it not continue to descend on the approach - the pilot would have no method to execute a missed approach. This jamming has to end.

Original NASA ASRS Text

Title: Eclipse pilot reported experiencing GPS jamming during cruise that lasted for an hour.

Narrative: Flying at FL410; I encountered a loss of GPS signal as a result of jamming. On the ATC frequency there were numerous aircraft that were similarly affected. All aircraft had to resort to flying by heading; or an alternative means of navigation. In some cases aircraft had to descend since their AHRS require GPS signals. In my case the disruption to navigation lasted nearly an hour. This extremely frequent jamming of critical GPS navigation is a significant threat to aviation safety. This affects all aircraft and could result in critical altitude changes for aircraft that are required to descend to lower altitude when losing a GPS signal. If can aircraft has to descend to a lower altitude it can have a significant impact on its range and could result in a diversion. Most modern aircraft rely solely on GPS not only for navigation signals in cruise; but also to determine range; fuel remaining; and other critical aspects of flight. In addition this disruption also impact instrument approach procedures. Since the FAA is deprecating VORs; NDBs; and associated approaches; we are becoming dependent upon an unreliable navigation system. Imagine an aircraft on an RNAV approach in IMC and it loses the GPS signal. Not only could it not continue to descend on the approach - the pilot would have no method to execute a missed approach. This jamming has to end.

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.

Attributes
ACN	1683854
Time
Date	201909
Local Time Of Day	0001-0600
Place
Locale Reference	ZAB.ARTCC
State Reference	NM
Environment
Flight Conditions	Mixed
Aircraft 1
Make Model Name	Eclipse 500
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 11000 Flight Crew Type 200
Events
Anomaly	Aircraft Equipment Problem Less Severe