As a reference station, a HOBO weather station (Onset Computer Corporation, USA) with rain (mm), temperature (◦C), relative humidity (%) and incoming solar radiation (W m−2) was installed next to the experimental setup. The temperature/RH sensor used was a 12 bit Temperature Smart Sensor (S-THB-M002) with a reported accuracy of ±0.13 ◦C. The reference station had a measurement interval of 5 min. The sensor was placed inside a HOBO RS1 radiation shield with only natural ventilation.