PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-12:28:10
G01     95.6           30.3                5.2 +/-    0.95       9.1 +/-    0.95  0.030 / 0.020
G07     120.8          49.4                4.9 +/-    0.66       6.3 +/-    0.66  0.030 / 0.020
G08     41.8           9.6                 4.3 +/-    2.47      12.2 +/-    2.47  0.030 / 0.040
G11     73.0           40.7                4.7 +/-    1.21       6.7 +/-    1.21  0.030 / 0.050
G13     299.5          34.5                3.2 +/-    0.97       5.1 +/-    0.97  0.070 / 0.130
G17     210.7          50.3                4.8 +/-    0.52       6.1 +/-    0.52  0.070 / 0.090
G18     68.1           24.2                4.0 +/-    1.88       7.9 +/-    1.88  0.060 / 0.130
G19     212.9          19.4                2.4 +/-    1.86       5.3 +/-    1.86  0.060 / 0.120
G28     339.0          61.9                2.6 +/-    0.35       2.9 +/-    0.35  0.080 / 0.120
G30     76.0           80.0                3.6 +/-    0.37       3.7 +/-    0.37  0.080 / 0.120