PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-13:12:40
G02     202.9          23.4                4.7 +/-    1.92       9.6 +/-    1.92  0.060 / 0.080
G06     165.0          62.2                6.9 +/-    0.30       7.7 +/-    0.30  0.100 / 0.090
G12     304.4          12.8                3.6 +/-    1.70       9.4 +/-    1.70  0.110 / 0.220
G17     30.7           53.4                5.2 +/-    0.62       6.3 +/-    0.62  0.130 / 0.290
G19     328.5          69.2                5.3 +/-    0.87       5.6 +/-    0.87  0.030 / 0.040
G24     303.0          36.1                4.5 +/-    2.31       7.0 +/-    2.31  0.030 / 0.030
G28     94.7           36.5                6.5 +/-    0.84      10.0 +/-    0.84  0.040 / 0.030