The specification for the u-blox GPS receiver used in Asset Tracker 2 can be found here:
The AssetTrackerRK and AssetTracker drivers do not support setting any parameters in the ublox device other than enabling an external antenna.
The ublox receiver allows tuning many parameters such as which satellite networks to use, type of fix to use (2d, 3d), measurement rate, etc. I have written and published a driver that enables use of many of the features of the device and tried to make it easy to add additional functionality as needed. The ublox driver (UbloxM8Q_GPS) is accessed via a thin driver layer called AssetTracker2 which is similar in capability to the original AssetTracker driver.
I haven't yet published the latest version that uses the odometer and static hold features of the ublox receiver but I can if anyone is interested. Static Hold tells the device to suppress duplicate position reports. It includes the ability to set distance and speed parameters to filter out the jitter when the receiver is sitting still in a position where it gets noise and reflections of gps signals causing variable position readings.