110                   :f (GHz)
521.4 0 177.2         :x00  y00 z00 (cm)  : mirror position
1.94 1.94  0. 0.  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]