PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-17:57:40
G02     59.0           34.7                7.3 +/-    0.86      11.6 +/-    0.86  0.080 / 0.210
G05     57.6           62.3                7.8 +/-    0.62       8.6 +/-    0.62  0.100 / 0.190
G12     182.1          28.3                9.3 +/-    1.83      16.9 +/-    1.83  0.060 / 0.150
G13     126.2          16.5               10.1 +/-    2.65      24.3 +/-    2.65  0.120 / 0.120
G15     166.9          11.2                3.6 +/-   24.28       9.7 +/-   24.28  0.040 / 0.030
G21     273.0          18.4                8.7 +/-    2.07      19.8 +/-    2.07  0.030 / 0.030
G25     230.4          50.0                7.9 +/-    3.31      10.0 +/-    3.31  0.070 / 0.070
G29     329.2          55.7                8.7 +/-    0.84      10.2 +/-    0.84  0.060 / 0.080