PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-11:27:50
G01     57.7           29.7                5.0 +/-    1.68       8.9 +/-    1.68  0.130 / 0.210
G07     143.2          19.4                4.3 +/-    3.01       9.6 +/-    3.01  0.120 / 0.210
G11     46.7           20.8                3.0 +/-    2.33       6.5 +/-    2.33  0.090 / 0.130
G13     259.3          34.5                5.8 +/-    1.46       9.3 +/-    1.46  0.110 / 0.090
G15     296.5          14.3                1.5 +/-    1.21       3.8 +/-    1.21  0.040 / 0.040
G17     275.5          79.0                5.0 +/-    0.61       5.1 +/-    0.61  0.040 / 0.040
G18     40.1           10.3                2.2 +/-    1.63       6.2 +/-    1.63  0.100 / 0.110
G19     233.9          48.1                5.3 +/-    1.93       6.8 +/-    1.93  0.070 / 0.130
G28     38.1           56.4                4.3 +/-    0.99       5.1 +/-    0.99  0.090 / 0.390
G30     145.7          51.6                6.1 +/-    0.46       7.5 +/-    0.46  0.140 / 0.400