Example of the analysis with the ECB model using the solar signal in the Grueff Radio Telescope at 18.3 GHz on September 2, 2020. The solid green line indicates the instrumental beam pattern, the dashed blue line indicates the observed equatorial T_B profile of the solar map, the dotted violet line indicates the modelled equatorial T_B profile of the ECB model (Eq. (3)), and the solid red line indicates the convolved best-fit T_B profile using the instrumental beam pattern and the ECB model as the solar signal.