PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-13:43:10
G01     119.1          17.9                7.9 +/-    0.87      18.3 +/-    0.87  0.040 / 0.040
G07     80.6           66.6                8.3 +/-    0.55       9.0 +/-    0.55  0.030 / 0.040
G08     44.7           30.9                5.9 +/-    0.72      10.2 +/-    0.72  0.100 / 0.250
G09     175.8          24.5                8.3 +/-    1.17      16.5 +/-    1.17  0.100 / 0.380
G11     106.0          40.0                8.7 +/-    0.55      12.7 +/-    0.55  0.020 / 0.040
G13     317.6          19.6                7.0 +/-    1.53      15.5 +/-    1.53  0.020 / 0.040
G17     201.6          24.6                5.8 +/-    3.35      11.4 +/-    3.35  0.040 / 0.050
G18     93.9           20.8                7.9 +/-    0.69      17.1 +/-    0.69  0.040 / 0.060
G28     292.6          57.3                7.7 +/-    0.64       8.9 +/-    0.64  0.050 / 0.090
G30     344.9          68.1                5.6 +/-    0.99       6.0 +/-    0.99  0.040 / 0.100