PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-02:27:50
G01     119.0          17.7                7.1 +/-    0.92      16.5 +/-    0.92  0.030 / 0.040
G07     85.1           64.3                4.7 +/-    0.32       5.1 +/-    0.32  0.030 / 0.040
G08     44.1           29.0                0.7 +/-    0.98       1.3 +/-    0.98  0.110 / 0.360
G09     175.8          24.8                6.0 +/-    1.15      11.8 +/-    1.15  0.120 / 0.370
G11     104.3          40.2                5.7 +/-    0.59       8.2 +/-    0.59  0.050 / 0.070
G13     317.5          19.9                4.0 +/-    3.16       8.7 +/-    3.16  0.040 / 0.060
G17     200.4          27.0                6.4 +/-    1.98      12.0 +/-    1.98  0.090 / 0.150
G18     90.2           20.4                5.0 +/-    0.77      11.0 +/-    0.77  0.080 / 0.180
G28     289.0          55.9                4.9 +/-    0.74       5.8 +/-    0.74  0.030 / 0.040
G30     343.9          67.9                1.7 +/-    0.68       1.8 +/-    0.68  0.030 / 0.030