Here2 CAN mode, error "prearm High Gps HDOP" - Cubepilot
HDOP reported by iNav is much higher than that read by uCenter · Issue #3716 · iNavFlight/inav · GitHub
GPS Accuracy: HDOP, PDOP, GDOP, Multipath & the Atmosphere
Session III GPS DEPTH-FINDER UNITS. F GPS positions are not error free –User and/or Satellite clock bias. –Satellite signal can be blocked. –Atmospheric. - ppt download