Figure 3. (a) An example of raw receiver gather at station 1185, in the central part of the profile. Clear first breaks up to 5 km offsets and a series of reflections (D1) are visible. (b-d) The same receiver gather as (a) but after different processing stages, (b) after the application of refraction static corrections, (c) after spectral equalization, deconvolution, time variant filter and median filter, and (d) after surface-consistent residual static corrections and top mute. Note how the reflections marked by black arrows become more continuous and stronger after each of these steps.