PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-13:57:40
G02     212.8          49.8                8.0 +/-    1.15      10.1 +/-    1.15  0.060 / 0.090
G06     77.1           77.8                5.4 +/-    0.45       5.5 +/-    0.45  0.050 / 0.070
G12     317.3          33.6                3.1 +/-    1.13       5.1 +/-    1.13  0.040 / 0.090
G17     53.3           34.8                4.2 +/-    0.62       6.6 +/-    0.62  0.080 / 0.080
G19     25.2           56.4                5.2 +/-    0.32       6.1 +/-    0.32  0.040 / 0.030
G24     270.3          43.2                4.0 +/-    0.96       5.5 +/-    0.96  0.030 / 0.020
G28     118.0          19.0                8.1 +/-    0.87      18.3 +/-    0.87  0.030 / 0.030