docs: def define_from_values(cls, xdtu, ydtu, zdtu, xdtu_0, ydtu_0, zdtu_0):
          """Define class object from from provided values.
  
          Parameters
          ----------
          xdtu : float
              XDTU fits keyword value.
          ydtu : float
              YDTU fits keyword value.
          zdtu : float
              ZDTU fits keyword value.
          xdtu_0 : float
              XDTU_0 fits keyword value.
          ydtu_0 : float
              YDTU_0 fits keyword value.
          zdtu_0 : float
              ZDTU_0 fits keyword value.
  
          """
  
          self = DtuConfiguration()
          # define DTU variables
          self.xdtu = xdtu
          self.ydtu = ydtu
          self.zdtu = zdtu
          self.xdtu_0 = xdtu_0
          self.ydtu_0 = ydtu_0
          self.zdtu_0 = zdtu_0
          return self