These are the meteorological measuring instruments: br 1. The thermometer br 2. The hygrometer br 3. The barometer br 4. The rain gaugebr 5. The anemometerbr 6. The weather vanebr 7. The snow gauge br 8. The heliograph br Until the middle of the 20th century, professionals mainly used ground weather stations to collect as much atmospheric data as possible. Since the Second World War, new methods have been introduced: aerial observations. Then came the development of radars and meteorological satellites. But ground-based meteorological surveys are still a very effective method for studying these atmospheric phenomena.