Elevation affects distances, trajectory and descent angle  The higher the elevation, the less dense the air is. Because of this, there is less drag force on the ball (resistance) allowing it to maintain speed during flight, resulting in greater distance.   General rule of thumb is every 1500 ft of increased elevation = ball will travel 3-5% further  A range ball vs premium ball will also affect your data. A range ball will fly shorter, generate less spin, and not produce as much ball speed as a premium golf ball.   Within the MLM2PRO App, you can adjust your settings to account for elevation and ball type to ensure your data is as accurate as possible.