Grounds And Sensor Maintenance At The Aachen Weather Station, Caretaker Service Including Empty Space Cleaning At The Aachen And Magdeburg Weather Stations, Cleaning Including Glass And Frame Cleaning At The Rostock-Warnemünde Radar Site, Winter Service And Street Cleaning At The Nürburg-Barweiler Weather Station As Well As Winter Service At The Trier Weather Station Of The German Weather Service (Dwd).