Visualization of the amount of information useful for molecular mapping detection. Top panel: PSD of two high-pass filtered planet spectra (T=500K and T=1200K, log(g)=4, [M/H]=0) at the same resolutions and with the same amount of photons. Bottom panel: PSD of high-pass filtered planet spectra (T=1700K, log(g)=4, [M/H]=0) on two different spectral ranges with a 300 nm bandwidth (center on λ₀ = 1.35 µm in red and center on λ₀ = 1.75 µm in purple).