Figure 9

Comparison between IWV values obtained from radiosonde data versus the GPS-IWV values, using the spatio-temporal clouds distribution, for days where clouds were apparent above the IMS radiosonde launch site (above Bet Dagan). The blue lines shows linear dependency with correlation coefficient 0.93, obtained using the least square method between the GPS-IWV data set and the radiosonde data. The black line shows where both of sets are equal. Mean and RMS difference between the two data sets were reduced from 1.77 and 2.81 kg/m2 to 0.74 and 2.04 kg/m2, respectively.