Radio propagation analysis of the TIII(1) and TIII (3). Left: Calibrated peak radio fluxes as a function of spacecraft locations λ for six frequency channels denoted by the colored circles. Dotted lines are results of the Eq. (B.1) fitting. Vertical dashed lines indicate modeled direction of the peak fluxes. Right: Longitudinal spacecraft constellation plots like in Fig. 1 (left) but with reference longitudes corresponding to the results of the radio propagation analysis for TIII(1) (top) and TIII(3) (bottom).