convolutional_gridding.py 文件源码

def visibility_recentre(uvw, dl, dm):
    """ Compensate for kernel re-centering - see `w_kernel_function`.

    :param uvw: Visibility coordinates
    :param dl: Horizontal shift to compensate for
    :param dm: Vertical shift to compensate for
    :returns: Visibility coordinates re-centrered on the peak of their w-kernel
    """

    u, v, w = numpy.hsplit(uvw, 3)
    return numpy.hstack([u - w * dl, v - w * dm, w])