PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-17:12:00
G02     43.0           47.4                6.2 +/-    0.38       8.2 +/-    0.38  0.040 / 0.020
G05     107.9          70.6                8.7 +/-    0.76       9.2 +/-    0.76  0.030 / 0.030
G12     185.5          48.5               10.9 +/-    1.72      14.0 +/-    1.72  0.060 / 0.070
G25     264.0          59.3                8.9 +/-    1.14      10.1 +/-    1.14  0.090 / 0.050
G29     317.2          39.0                7.0 +/-    1.22      10.3 +/-    1.22  0.040 / 0.050