Geometry of the WASP-76 b system. The planet is shown from a polar perspective, at different phases of its orbit, with the inflated dayside in yellow and the nightside in dark blue. The orange circle is the hotspot, for which we consider two possible locations: (A) at the substellar point (no offset) or (B) with a westward offset; to compare the possible atmospheric dynamics of each case. The arrows represent the motion of winds, and whether they appear blueshifted or redshifted to an observer on Earth. The dashed black line separates the hemisphere visible to the observer from the non-visible one. A proposed scenario of atmospheric circulation that could lead to the results of this work is presented in the text (see Sect. 5.1 for discussion).