GPS MT3339 pa6h Low speed moving

hello i have some MT3339 pa6h gps modules i have place in a small car robot that moviing with low speed!!! and my problem is that if i stand still for some sec and then start moving the gps start to uptate the nmea coordinates if the car move more than 5 meter

in the comand list https://www.adafruit.com/datashe... is a command that set Speed threshold but i have confirm that is 0 m/S

if anyone have any ides please tellme thanks

GPS isn't going to be accurate enough for this. The GPS location and speed will change, even when the car is sitting still. Using an IMU and/or wheel encoders would be better. Using all of them would be best, but combining multiple sources of information (GPS speed, IMU acceleration and wheel ticks) is not a simple problem.

Cheers, /dev

my problem is that if i stand still for some sec and then start moving the gps start to uptate the nmea coordinates if the car move more than 5 meter

That is what most people expect a GPS to do. Why is that a problem?