def get_collection_and_suffix(collection_name):
    """
    Lookup collection and suffix based on the name of the collection as used by GEE

    Parameters
    ==========
    collection_name: str, GEE name of the collection, eg. 'COPERNICUS/S2'

    Returns
    =======
    collection: str, user-friendly name of the collection, e.g. 'Sentinel2'
    suffix:  str, contraction of collection name, used in the filenames of plots
    """

    if collection_name == 'COPERNICUS/S2':
        collection = 'Sentinel2'
        satellite_suffix = 'S2'

    elif collection_name == 'LANDSAT8':
        collection = 'Landsat8'
        satellite_suffix = 'L8'

    elif collection_name == 'LANDSAT7':
        collection = 'Landsat7'
        satellite_suffix = 'L7'

    elif collection_name == 'LANDSAT5':
        collection = 'Landsat5'
        satellite_suffix = 'L5'

    elif collection_name == 'LANDSAT4':
        collection = 'Landsat4'
        satellite_suffix = 'L4'

    else:
        raise RuntimeError("Unknown collection_name {}".format(collection_name))
    return collection, satellite_suffix