PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/16-14:27:50
G02     54.1           36.9                4.5 +/-    0.47       6.8 +/-    0.47  0.030 / 0.030
G05     76.2           68.1                6.1 +/-    0.49       6.5 +/-    0.49  0.020 / 0.030
G12     188.1          42.2                7.5 +/-    1.81      10.6 +/-    1.81  0.080 / 0.060
G20     204.9          49.8                9.1 +/-    1.47      11.5 +/-    1.47  0.060 / 0.050
G21     266.2          15.8                6.8 +/-    1.56      16.7 +/-    1.56  0.050 / 0.060
G25     248.5          56.4                6.1 +/-    0.93       7.2 +/-    0.93  0.030 / 0.060
G29     327.4          52.5                3.0 +/-    0.75       3.7 +/-    0.75  0.220 / 0.410