Transit depth differences between cloudy and clear scenarios. Top: differences between (planetary) average transit depths of clear and cloudy atmosphere scenarios for tidally locked planets with T_global = 800 K… 2600 K orbiting G main sequence stars (left: all latitudes are used, right: only equatorial information is used). The cloud mass loads, ρ_g/ρ_d(z), in atmospheric layers where 〈a〉 < 0.1 μm are denoted by different markers (crosses: 10⁻³ρ_g/ρ_d(z), diamonds: 10⁻²ρ_g/ρ_d(z), squares: 0.1ρ_g/ρ_d(z)). Triangles denote Fe-free results with full ρ_g/ρ_d(z). Colors denote different telescopes with optical band passes (black: PLATO’s white band, golden: PLATO’s red filter, blue: PLATO’s blue filter, green: CHEOPS, pink: TESS. The PLATO data has been offset horizontally by −25 K and the TESS/CHEOPS data by +25 K, respectively, for better visibility.). Bottom: average transit depths differences between PLATO’s red and blue filter for cloudy (crosses, diamonds, squares, triangles) and clear atmosphere calculations (circles).