PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-09:27:50
G01     119.8          17.3                4.0 +/-    1.01       9.5 +/-    1.01  0.030 / 0.040
G07     79.8           66.4                5.6 +/-    0.47       6.1 +/-    0.47  0.030 / 0.030
G08     44.6           30.4                3.0 +/-    0.68       5.1 +/-    0.68  0.030 / 0.030
G09     173.8          22.5                6.1 +/-    1.84      12.6 +/-    1.84  0.030 / 0.030
G11     106.2          39.8                5.5 +/-    0.73       8.0 +/-    0.73  0.120 / 0.270
G13     317.9          19.1                3.8 +/-    1.18       8.6 +/-    1.18  0.110 / 0.260
G17     200.8          25.2                5.1 +/-    1.15      10.0 +/-    1.15  0.080 / 0.200
G18     93.7           20.4                4.8 +/-    0.94      10.5 +/-    0.94  0.090 / 0.240
G28     289.8          56.5                5.1 +/-    0.96       6.0 +/-    0.96  0.120 / 0.270
G30     342.0          66.8                2.4 +/-    0.72       2.5 +/-    0.72  0.110 / 0.300