@Woodster said:
So the main purpose of this setting is to save power I assume ( like some brands have a an “every 1min” GPS logging rate ) ?
I think it’s just Suunto’s method for smoothing out the GNSS trace and, maybe secondary, to regulate activity distance. Suunto watches used to produce a very “raw” looking trace prior to software version 2.39.20. And, in my experience, this contributed to exaggerated activity distance since Suunto relies heavily on this trace for distance totals.
My guess as to why this setting exists in the debug menu is that it was used by testers to help determine the best distance threshold to balance smoothing and distance accuracy. Obviously the setting is not meant for the average user. And I don’t think it contributes to any power savings as the watch needs to track GNSS position continuously to determine when it reaches the set threshold. It also has no effect on other activity data (HR, altitude, pace, power, etc.) that continue to be tracked at one second intervals.