170.                      :f (GHz)
699.871  0.000  441.441   :x00  y00 z00 (cm)  : mirror position
2.9 2.9  213.4 213.4  0   :w0xt w0yt [beam waist (cm)] d0xt d0yt [beam waist distance (cm) from launch, d0>0 towards plasma] phiwr [orientation angle (deg), phiwr=0: horiz x-axis]