100                  : freq GHz
550.0 0.0 -740.5     : x,y,z antenna position in cm
6.0 6.0  0.0 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]