This drawing qualitatively explains the results of the Doppler radar velocity measurement for the 7.62 x 51 Nato bullet from its coning motion on the descending part of the trajectory.
While the coning bullet moves its tip towards the antenna, a velocity component subtracts from the radial velocity of the CG (the antenna "sees" an approaching bullet axis plus a withdrawing CG) and while the bulletīs tip withdraws from the antenna, a velocity component adds to the radial bullet velocity (the antenna "sees" a withdrawing bullet axis plus a withdrawing CG).
Thus, the oscillating nature of the measured velocity (see figure 
)
results from a superposition of the coning motion of the bulletīs
longitudinal axis and the displacement of the CG along the trajectory.
