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  _____      ___     __   __   _    _    __   _   
 / ____||   / _ \\   \ \\/ // | || | || | || | || 
/ //---`'  / //\ \\   \   //  | || | || | '--' || 
\ \\___   |  ___  ||  / . \\  | \\_/ || | .--. || 
 \_____|| |_||  |_|| /_//\_\\  \____//  |_|| |_|| 
  `----`  `-`   `-`  `-`  --`   `---`   `-`  `-`

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Text this: Legendre fit to the reflection coefficient of a radiating rectangular waveguide aperture