PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/17-09:57:40
G02     212.5          53.4                7.7 +/-    0.56       9.3 +/-    0.56  0.040 / 0.060
G06     79.2           78.7                5.9 +/-    0.42       6.0 +/-    0.42  0.050 / 0.060
G12     316.6          31.6                5.4 +/-    1.43       9.1 +/-    1.43  0.070 / 0.100
G17     54.4           33.5                3.1 +/-    0.66       5.1 +/-    0.66  0.060 / 0.080
G19     28.7           54.8                4.9 +/-    0.94       5.8 +/-    0.94  0.030 / 0.020
G24     267.1          43.6                4.8 +/-    0.92       6.6 +/-    0.92  0.030 / 0.020
G28     118.3          19.1                7.1 +/-    1.15      16.0 +/-    1.15  0.050 / 0.040