def nrrcus_stnid(stnid):
    """
    Number of RCUs from station ID

    Parameters
    ---------
    stnid: str
        Station ID

    Returns
    -------
    nrrcus: int
        Number of RCUs
    """
    location_id = stnid[:2]
    if location_id == 'CS' or location_id == 'RS':
        nrrcus = 96
    else:
        # EU station
        nrrcus = 192
    return nrrcus