The second assessment is the Perceived Depth Test, which takes it a step further. Leave the first ball in place, and hold a second ball in your dominant hand with your arm extended. The goal is to ...

This simple, yet effective tool has completely transformed my approach to putting, and here's why it became a go-to in my game this season. The post Why this putting mirror was my favorite purchase of ...

Abstract: Many in-motion coarse alignment methods have been proposed and have achieved good results for the strapdown inertial navigation system (SINS) aided by the global positioning system (GPS).