Regional Jet CL65; Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Flight Crew Became Reoriented; Flight Crew Overcame Equipment Problem
Human Factors; Aircraft
We departed on the Yosemite 1 departure. ATC gave us a heading and cleared us to FRAME intersection when able. We entered FRAME into the FMS and executed that entry. The aircraft appeared to turn toward the waypoint however ATC asked us if we were turning toward FRAME yet. At that point it appeared the GPS had lost position and we declared a lost signal to ATC and asked for vectors. We were not able to regain accuracy with the GPS and navigated on vectors and VOR tracking for the remainder of the trip.Perhaps recognition of the issue before departure [would have mitigated this issue] had it become evident.
[Report narrative contained no additional information.]
CRJ flight crew reported a track deviation resulted when they lost their GPS departing FAT airport.