def createStationName(longitude, latitude):
    """Create station name from the station's longitude and latitude.

       For various purposes (ex: CRLs) we need the station the message
       came from. We also sometimes (for the standard) need to display
       the longitude and latitude of the station. This function justs
       appends the latitude to the longitude separated by a ``~``.
       It will work as a station ID and we can pull it apart for presenting
       the longitude and latitude of the station. 

       Note that both the ``longitude`` and ``latitude`` arguments will have
       their decimal points truncated to no more than 6.

       Args:
        longitude (float): Station's longitude
        latitude (float): Station's latitude

       Returns:
        str: Station string containing latitude concatinated to
        longitude, separated by a tilde (``~``).
    
    """
    # Just append the lat and long using '~'. That way, station
    # name can be used for coordinates (standard states you need
    # to show the coordinates at times).
    return str(latitude) + '~' + str(longitude)