PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-19:28:00
G01     88.1           32.3               15.0 +/-    1.85      25.1 +/-    1.85  0.120 / 0.210
G07     127.1          44.4               19.0 +/-    0.90      25.9 +/-    0.90  0.020 / 0.030
G11     67.7           39.7               15.0 +/-    1.57      21.9 +/-    1.57  0.030 / 0.020
G13     292.7          36.4               17.1 +/-    2.64      26.5 +/-    2.64  0.050 / 0.050
G15     314.4          10.5               -5.5 +/-   16.74     -15.2 +/-   16.74  0.040 / 0.040
G17     216.5          51.8               21.1 +/-    1.22      26.1 +/-    1.22  0.060 / 0.150
G18     62.4           23.7               12.5 +/-    1.26      25.1 +/-    1.26  0.070 / 0.120
G19     215.6          27.5               22.4 +/-    2.57      41.5 +/-    2.57  0.070 / 0.100
G28     353.3          61.6               15.5 +/-    0.45      17.4 +/-    0.45  0.060 / 0.090
G30     111.2          73.7               18.5 +/-    0.47      19.1 +/-    0.47  0.050 / 0.050