BALL VELOCITY
Ball velocity (also called ball speed) is measured
at the point of separation and can be displayed
in either miles per hour, kilometers per hour, or
meters per second.
VERTICAL LAUNCH ANGLE
Vertical launch angle is the angle, measured in
degrees, between the ground plane and the ball
launch vector.
HORIZONTAL LAUNCH DIRECTION
Horizontal launch angle (also known as azimuth,
deviation angle, or side angle) is the lateral devi-
ation of the ball launch from the target line mea-
sured in degrees.
TOTAL SPIN
Total spin is the rotations (per minute) of the golf
ball around the spin axis.
SPIN-TILT AXIS
The spin-tilt axis is the axis the golf ball rotates
around to define shot curvature and lift. When
the spin-tilt axis is oriented to the left (looking
down range), the ball’s trajectory will move from
right to left, and vice versa.
BACK AND SIDE SPIN
Backspin is the rotation (per minute) of the ball
given a completely neutral spin tilt axis, derived
from total spin. Side spin is the rotation (per
minute) of the ball around its vertical axis, de-
rived from spin tilt axis.
BALL DATA
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ESSENTIAL PUTTING ANALYSIS INSTRUCTIONAL GUIDE
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