Light Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Human-Machine Interface; Confusion; Workload
ATC Issue All Types; Deviation / Discrepancy - Procedural Other / Unknown; Inflight Event / Encounter Other / Unknown
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Requested ATC Assistance / Clarification
ATC Equipment / Nav Facility / Buildings; Airspace Structure; Company Policy; Environment - Non Weather Related; Human Factors; Procedure
Center changed our arrival procedure 4 times; 4 different procedures in approximately 4 minutes. Our clearance was to fly to a fix at a specified altitude and due to the confusing clearances that Center was rattling off we missed the crossing restriction and had to be vectored in the descent. The problem was that the crossing restriction was for a clearance that changed. All of this happened because of GPS jamming going on in the area. I'm filling out this report so that you all know that it was EXTREMELY busy; ATC was making too many requests; one right after another; and all of this required continuous FMS changes; inputs; and confirmations. How could things have gone better; I'm not sure. We did the best we could but it became task saturated for them and us. They told us that it wasn't a problem; however; I'm still filling out this report to enlighten the team on how screwball things got with 4 different arrival changes in such a short period of time. I don't have any thoughts on how this could have been avoided.
ATC facility stated this is a common occurrence. NOTAMs referencing times and locations are issued. Mostly affected is general aviation that does not have backup navigation capabilities like INS. Recurring known issue.
Corporate jet pilot reported receiving several revised clearances in a short amount of time from a very busy ZLC Center Controller due to GPS jamming occurring in the area.