PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-14:43:10
G01     89.0           32.1                9.9 +/-    0.77      16.6 +/-    0.77  0.020 / 0.030
G07     126.4          44.7               11.4 +/-    1.03      15.5 +/-    1.03  0.020 / 0.030
G11     66.9           39.0                9.7 +/-    1.68      14.4 +/-    1.68  0.050 / 0.050
G13     293.3          36.4                9.4 +/-    2.33      14.5 +/-    2.33  0.060 / 0.060
G17     215.2          54.6               12.6 +/-    1.00      15.0 +/-    1.00  0.090 / 0.090
G18     62.5           23.5                9.7 +/-    0.82      19.6 +/-    0.82  0.100 / 0.100
G19     215.3          25.2               12.4 +/-    1.99      24.2 +/-    1.99  0.090 / 0.120
G28     350.8          61.7                9.6 +/-    0.89      10.7 +/-    0.89  0.100 / 0.110
G30     105.7          76.3               11.4 +/-    0.56      11.7 +/-    0.56  0.060 / 0.110