PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-12:28:10
G01     230.9          21.2                6.3 +/-    2.08      13.4 +/-    2.08  0.060 / 0.090
G03     297.6          65.2                5.8 +/-    1.10       6.3 +/-    1.10  0.070 / 0.130
G14     78.9           31.8                4.4 +/-    1.47       7.5 +/-    1.47  0.030 / 0.030
G16     149.4          40.2                7.5 +/-    1.51      10.8 +/-    1.51  0.030 / 0.030
G18     207.5          11.4                3.5 +/-    2.76       9.5 +/-    2.76  0.140 / 0.240
G22     217.3          73.8                6.4 +/-    0.31       6.6 +/-    0.31  0.090 / 0.190
G23     305.5          37.1                4.9 +/-    1.20       7.4 +/-    1.20  0.050 / 0.070
G26     104.6          52.3                7.7 +/-    0.75       9.4 +/-    0.75  0.050 / 0.070
G31     43.8           35.2                5.6 +/-    0.98       8.8 +/-    0.98  0.040 / 0.030