def find_min_himawari_image_segment(bb):
    """
    :param bb: bounding box
    :return: the himawari image segment for the given bounding box
    """
    # there are ten 2200 pixel segments in himawari 0.5 km data
    seg_size = 2200
    min_segment = bb['min_y'] / seg_size + 1
    return min_segment