thank you so much for replaying I am having similar issue mentioned in this post Drone on map area keeps moving around when drone is on ground and is very far from the drone's actual location I am currently using neo3 gps gps HDOP is 0.7 and sat count is 22 however still my drone GPS position is in accurate on the map it jumps arround in 3 to 4 meter radius circle, lets say on mission planner if the drone is showing on extreme end of the circle 3 meters away from the original position if I arm the drone and takeoff still the drone will fly completely fine with no issues but I wanted to simulate this behaviour in SITL for multi drone scenarios and swarm where GPS accuracy is must thank you !