PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/05-17:58:00
G02     40.7           49.3                7.9 +/-    0.43      10.1 +/-    0.43  0.030 / 0.030
G05     113.0          69.3                8.6 +/-    0.89       9.1 +/-    0.89  0.040 / 0.030
G12     183.9          50.4               10.2 +/-    0.99      12.7 +/-    0.99  0.040 / 0.060
G25     273.4          59.0                9.4 +/-    0.86      10.8 +/-    0.86  0.050 / 0.050
G29     314.5          35.6                7.4 +/-    1.06      11.6 +/-    1.06  0.040 / 0.060