I've modified the Tracker task/profile. The profile, NewFixAvailable,
now writes a new position to the Track file when a new track position
update is available, triggered by a change to %LOCTMS, provided that
there hasn't been a track position update for 10 seconds.
That eliminates the multiple track updates that often happen one or
two seconds apart as Tasker waits for the accuracy of the position to
stabilize.