It is shown, using the data obtained by the Planck space telescope (2009-2013), that the angular CMB Doppler spectrum: $C_l \sim \exp-(l/l_c)$, with $l_c \simeq 300$ in the interval $370 < l < 2500$. The waviness observed along the exponential decay has period (distance between peaks) equal to the same $l_c \simeq 300$. It means that the waviness is generated by the same, presumably chaotic, mechanism that generates the exponential decay. Comparison with deterministic chaos simulations has been briefly discussed.
Fri, 9 Oct 15