01/24/2021
P waves
Wrong shot position
All shots = x-2m
Source : 4.5 kg sledge hammer hitting a horizontal metallic plate



S waves
First 3 shots toward the road
33 S sensors 15 P sensors at the end of the profile
permutation at file 2028 : all sensors in place are S. 
source : 4.5 kg sledge hammer hitting a steel prism with 45° inclined faces placed perpendicular to the profile