PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-05:57:50
G10     269.8          39.6                7.5 +/-    1.14      10.9 +/-    1.14  0.140 / 0.600
G13     40.9           16.5                3.6 +/-    1.14       8.7 +/-    1.14  0.120 / 0.430
G15     56.4           46.6                4.8 +/-    0.62       6.3 +/-    0.62  0.090 / 0.170
G16     275.9          11.1                6.1 +/-    2.52      16.6 +/-    2.52  0.100 / 0.180
G20     2.7            66.8                5.2 +/-    0.61       5.6 +/-    0.61  0.090 / 0.180
G21     8.7            73.3                5.5 +/-    0.55       5.7 +/-    0.55  0.120 / 0.180
G24     118.0          15.7                6.6 +/-    0.81      16.2 +/-    0.81  0.060 / 0.070
G27     317.2          21.2                2.4 +/-    5.27       5.2 +/-    5.27  0.070 / 0.060
G29     168.5          28.8                6.4 +/-    0.93      11.4 +/-    0.93  0.040 / 0.040
G32     204.3          13.0                8.0 +/-    2.28      20.8 +/-    2.28  0.040 / 0.040