The radiosonde MSZ (Mario Zucchelli Station) monitors different atmospheric parameters along the vertical profile. The RDS is located at Mario Zucchelli Station. The climate parameters monitored are: Height (gps position), Pressure, Temperature, Humidity, Velocity of wind, Direction of the wind. The MSZ is active since 15/01/1987. Data are acquired only during the opening season of the Zucchelli station. Daily radiosonde launches (00:00 and 12:00 UTC). During the period from 16 November to the end of the campaign, the radio-sonde of 06 UTC was included as part of the intensive measures campaign of the YOPP project. The RDS (VAISALA RS92) is launched into the atmosphere coupled to a balloon inflated with helium. The sonde rises with a speed of about 2-5 m / s up to a height of between 20 and 25 km. During the ascent all the parameters are acquired. The data obtained are coded both in a digital format (BUFR) and in text format and entered into the global network (GTS) of the World Meteorological Organization (WMO).