PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-12:42:40
G02     201.4          14.0                2.7 +/-    3.89       6.9 +/-    3.89  0.100 / 0.100
G06     170.6          51.3                6.9 +/-    0.46       8.6 +/-    0.46  0.090 / 0.110
G13     229.2          15.2                4.6 +/-    2.36      11.3 +/-    2.36  0.120 / 0.220
G17     20.3           61.1                5.2 +/-    0.74       5.8 +/-    0.74  0.110 / 0.170
G19     297.2          69.3                4.9 +/-    0.66       5.2 +/-    0.66  0.150 / 0.320
G24     310.6          29.5                4.8 +/-    1.28       8.5 +/-    1.28  0.250 / 0.470
G28     83.6           42.3                4.3 +/-    0.70       6.0 +/-    0.70  0.040 / 0.040
G30     157.3          19.0                5.5 +/-    1.98      12.4 +/-    1.98  0.040 / 0.040