PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-12:27:40
G07     18.5           68.4                2.3 +/-    0.89       2.4 +/-    0.89  0.040 / 0.050
G08     61.1           46.8                3.2 +/-    0.42       4.2 +/-    0.42  0.040 / 0.060
G09     177.8          46.8                3.9 +/-    1.50       5.2 +/-    1.50  0.110 / 0.160
G11     128.6          28.4                6.3 +/-    1.47      11.4 +/-    1.47  0.170 / 0.220
G18     113.5          10.7               -1.3 +/-   23.93      -3.5 +/-   23.93  0.090 / 0.190
G23     160.0          17.9                4.3 +/-    1.18      10.1 +/-    1.18  0.100 / 0.190
G27     40.2           16.5                3.3 +/-    1.73       8.0 +/-    1.73  0.050 / 0.080
G28     260.0          46.0                3.4 +/-    0.67       4.5 +/-    0.67  0.050 / 0.080
G30     320.2          50.4                3.5 +/-    1.11       4.4 +/-    1.11  0.030 / 0.040