PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-16:28:10
G02     30.1           57.4                8.4 +/-    0.25       9.8 +/-    0.25  0.030 / 0.030
G05     143.5          62.3               10.1 +/-    0.74      11.2 +/-    0.74  0.030 / 0.040
G06     54.8           13.9                6.5 +/-    1.40      16.5 +/-    1.40  0.030 / 0.040
G12     191.5          64.3                9.3 +/-    0.88      10.2 +/-    0.88  0.030 / 0.040
G19     99.6           12.5                8.4 +/-    1.56      22.1 +/-    1.56  0.050 / 0.060
G25     292.0          56.2                8.0 +/-    0.49       9.4 +/-    0.49  0.040 / 0.050
G29     308.0          28.3                5.4 +/-    0.84       9.8 +/-    0.84  0.100 / 0.220