PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-14:57:40
G01     58.8           29.8                8.0 +/-    1.16      14.1 +/-    1.16  0.040 / 0.040
G06     179.9          16.1               12.4 +/-    2.52      30.1 +/-    2.52  0.040 / 0.050
G07     142.4          18.3                7.7 +/-    2.44      17.7 +/-    2.44  0.080 / 0.240
G11     47.0           20.2                5.7 +/-    2.19      12.4 +/-    2.19  0.070 / 0.260
G13     263.6          34.5                9.2 +/-    1.09      14.7 +/-    1.09  0.060 / 0.130
G15     295.6          15.6                5.0 +/-    3.35      12.3 +/-    3.35  0.070 / 0.140
G17     273.1          79.2                8.5 +/-    1.14       8.6 +/-    1.14  0.060 / 0.090
G19     234.5          53.9                9.3 +/-    2.09      11.2 +/-    2.09  0.100 / 0.130
G28     37.8           56.2                7.9 +/-    1.10       9.3 +/-    1.10  0.030 / 0.030
G30     144.2          53.4                9.5 +/-    0.66      11.5 +/-    0.66  0.020 / 0.030