PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/15-14:57:40
G02     34.7           53.9                7.1 +/-    0.66       8.6 +/-    0.66  0.040 / 0.040
G05     141.1          64.6               10.0 +/-    1.26      10.9 +/-    1.26  0.050 / 0.050
G06     56.4           12.0                6.1 +/-    0.86      16.3 +/-    0.86  0.070 / 0.050
G12     191.2          61.5               10.0 +/-    1.88      11.3 +/-    1.88  0.040 / 0.040
G25     284.6          58.5                6.9 +/-    1.01       8.0 +/-    1.01  0.030 / 0.030
G29     310.4          31.2                6.3 +/-    1.87      10.7 +/-    1.87  0.040 / 0.040