The launch site is located 10m above sea level. The first row of each sounding holds surface data for TTT, RH, ff and dd, which is not acquired by the radiosonde. The measuring height of TTT and RH is 29m, and 39m for dd and ff. The first pressure value of each profile is derived from surface pressure measuements, reduced to the indicated altitude. Soundings were performed using a different method (Radiosonde, Vaisala, RS41-SGP) on 2017-12-22T12:00, 2017-12-24T15:00, 2017-12-25T12:00 and 2017-12-27T18:00.