Fig. 6From: Detection of water vapor time variations associated with heavy rain in northern Italy by geodetic and low-cost GNSS receiversTime variations in \(\hbox {PWV}_\mathrm{goGPS}\) (a) and \(\hbox {PWV}_\mathrm{goGPSw}\) (b). Each row of the matrix shows one station, identified by its four-letter code, and the stations are ordered from west to east. Time variation interval: 10 min. The color scale shows PWV variations in (mm), where increases in PWV are shown in yellow and decreases are shown in blueBack to article page