This might be helpful to imagine what it is useful for in a real robot localization: https://veterobot.com/demos.html https://veterobot.com/demos.html . Video f

This might be helpful to imagine what it is useful for in a real robot localization: https://veterobot.com/demos.html https://veterobot.com/demos.html . Video for Unit3 nicely illustrates how fast (just in several steps) particles grouped up around real location. It is done with just four ultrasound range finders.