Add a section for frequent errors and explain how to toggle parameters

docs/source/jasmine.md

@@ -164,5 +164,6 @@ A flight is defined to be a longest straight-line trip of a particle from one lo
 - Definition of a place  
 A place is defined as a location where a person has paused for at least 15 minutes.
 
-- "GPS data are not collected or the quality is too low"
-This error gets triggered when the subject either has no data, or when less than 5% of their generated data files have at least 60 seconds of data.
+### Common Errors
+- "GPS data are not collected or the data quality is too low"
+This error gets triggered when the subject either has no data, or when less than a given proportion of their generated data files have at least 60 seconds of data. The default proportion of files required to avoid this error is 5%, but this can be toggled using the `parameters` argument in `jasmine.traj2stats.gps_stats_main`.