Outcome of the statistical analysis of all the TNR Band A data from March 1st, 2020 to March 12th, 2021. Upper panel: power index γ resulting from a power law fitting of the form PSD_A = PSD₀ × f^γ. The daily median values γ_med of the power index γ are displayed with the red full line. The red dashed line represents γ_med − 0.5 × |γ_med|. Lower panel: daily percentage of spectra with γ < γ_med − 0.5 × |γ_med|. This daily percentage is assumed to be a measure of the dust impact rate on Solar Orbiter. The vertical blue lines in both panels represent the first two perihelia of Solar Orbiter. The first one correspond to June 15, 2020 when the probe was at 0.51 au from the Sun and the second to February 10, 2021 when it was at 0.49 au.