Power distributions at v_LSR = 0 km s⁻¹, comparing single-channel H I column densities for EBHIS (top left) and GASS (top right) with the all-sky combination of both surveys (bottom left). The black lines indicate power spectra derived from raw observations, the magenta lines are beam corrected power spectra with fits. On the lower panel to the right we compare the beam corrected power spectra.