PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-02:13:00
G02     58.7           33.1                6.2 +/-    1.37      10.2 +/-    1.37  0.050 / 0.090
G05     59.5           61.2                7.9 +/-    0.53       8.9 +/-    0.53  0.060 / 0.080
G12     184.8          34.1               11.5 +/-    0.86      18.6 +/-    0.86  0.230 / 0.400
G13     129.7          14.0               12.0 +/-    2.20      30.5 +/-    2.20  0.110 / 0.370
G15     164.7          10.8                0.1 +/-   22.31       0.2 +/-   22.31  0.030 / 0.040
G20     217.8          13.2               11.0 +/-    1.75      28.5 +/-    1.75  0.030 / 0.040
G21     269.7          15.8               11.2 +/-    2.33      27.3 +/-    2.33  0.200 / 0.330
G25     240.7          53.1                9.1 +/-    3.35      11.1 +/-    3.35  0.230 / 0.430
G29     326.6          52.1               10.4 +/-    1.25      12.8 +/-    1.25  0.080 / 0.090