Figure 3. Panel (a) shows the altitudinal point of the
reflection one instant before and after the HF transmitters were turned
off (red and blue, respectively) while the panel (b) presents
the ratio between the term Tx (where x are 1, 3 and 4, equation 1) by T2
for the same altitudes presented in panel (a) . The cpresents the life time of the O(1D) atoms
(Θr ), which the neutral atmosphere constituent
concentrations (N2 and O2 )
were obtained by the NRLMSISE-00 Atmosphere Model using as reference
also the altitudes of panel (a) .