Time-averaged coverage of vertical slice V1 of f = 3.5 and 5 mHz oscillations, including harmonics at 1.5 mHz, and 2.5 mHz, respectively, with height. The HF bin is included in black as a proxy to the coverage for shocks in the region 0.5–2.5 Mm. It is noted that the HF bin for u_⊥ is not included, since only individual frequencies are considered. Underneath, the total domain coverage by the two MSFs (3.5 and 5 mHz) is shown, with the darkest regions representing the most coverage (> 60%) and the white regions representing no coverage.