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Fig. 6. Dorsal view of a flying bat showing the relationship between bearing angle
(
) and heading angle (
) in the global coordinate system for
a bat at three time points during the turn. Bearing angle is calculated from
the horizontal component of the body velocity vector
(Vb,xy, orange arrows) obtained as the
derivative of the position vector of the center of mass (CoM). The heading
angle (
) was defined as the angle between the projection of the
longitudinal axis of the body on the horizontal plane
(Xg–Yg) and the
Xg axis.