ps2d.py 文件源码

def k_perp(self):
        """
        Comoving wavenumbers perpendicular to the LoS

        NOTE: The Nyquist frequency just located at the first element
              after fftshift when the length is even, and it is negative.
        """
        k_x = self.k_xy
        return k_x[k_x >= 0]