TrackMan 4 is a highly accurate 3D Doppler radar system designed for golf and baseball. It is widely considered to be one of the most accurate tracking systems available in these sports.

TrackMan 4 uses advanced technology to measure various aspects of the golf or baseball swing, including club or bat speed, spin rate, launch angle, ball speed, and more. It achieves this by tracking the movement of the club or bat and the ball through the air using advanced radar technology.

The accuracy of TrackMan 4 has been tested and verified by numerous independent studies and experts in the golf and baseball industries. In general, the system has been found to be highly accurate and reliable, with measurement errors typically well within acceptable ranges.

However, it is important to note that like any measurement system, TrackMan 4 is not perfect and there can be some variance in its measurements. Factors such as weather conditions, equipment calibration, and user error can all impact the accuracy of the measurements. Nonetheless, TrackMan 4 remains a highly accurate and valuable tool for golfers and baseball players looking to improve their game.