*2.6. Orchard Water Status Estimation*

The CWSI was calculated per MC following Equation (1): *Twet* was calculated based on the average of the coolest 5% of canopy pixels of the whole orchard [9]; *Tdry* was calculated empirically as Tair + 2 ◦C [7,27]; and *Tcanopy* was calculated using the methods described in the previous section for T100% and T33%. The CWSI was denoted CWSI\_T100% and CWSI\_T33%, respectively. Air temperature values for the day and time of each thermal image campaign were acquired from the nearby Gadot meteorological station (33.03◦N; 35.62◦E). The CWSI graphs were constructed using the ggplot2 package in R [38].
