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__    __     ___     __   __     ___      ______  
\ \\ / //   / _ \\   \ \\/ //   / _ \\   /_   _// 
 \ \/ //   / //\ \\   \   //   / //\ \\    | ||   
  \  //   |  ___  ||  / . \\  |  ___  ||  _| ||   
   \//    |_||  |_|| /_//\_\\ |_||  |_|| /__//    
    `     `-`   `-`  `-`  --` `-`   `-`  `--`

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Text this: DOA estimation with a rotational uniform linear array (RULA) and unknown spatial noise covariance