Best-model comparisons between CO observations and models for all positions in W44E (W44E1: top row, W44E2: bottom row) for both the blue and red shock components, respectively. The four panels on the left show the high velocity fits while the four panels on the right show the low velocity fits in each position. Observations are marked by black squares, the best-shock models are displayed in violet line (blue lobe) and orange line (red lobe) and diamonds, the CO layer that we used to compensate the ambient emission affecting the CO (3–2) and CO (4–3) transitions in green line and triangels, and the sum of ambient and shock component in blue line (blue lobe) and red line (red lobe) with circles.