Comparison of the transmittance height profiles, presented in Figure 2B, with those calculated by the NRLMSISE-00 and DTM-2013 models. The black lines display the averaged measurement points (for TESIS individual points are also shown), the red/blue lines show simulations by the NRLMSISE-00 and DTM-2013 models. In the SPIRIT and SWAP cases, the error bars correspond to the transmittance determination errors, in the TESIS case to the dispersion of data averaged over multiple profiles.