PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-08:12:30
G10     253.3          28.6                7.5 +/-    1.43      13.6 +/-    1.43  0.090 / 0.430
G13     51.2           28.5                2.5 +/-    0.83       4.6 +/-    0.83  0.110 / 0.380
G15     78.5           55.9                5.4 +/-    0.24       6.4 +/-    0.24  0.040 / 0.060
G16     292.7          15.0                2.1 +/-    1.47       5.3 +/-    1.47  0.050 / 0.040
G20     24.0           63.2                4.0 +/-    1.09       4.4 +/-    1.09  0.040 / 0.050
G21     338.9          62.9                3.9 +/-    0.55       4.3 +/-    0.55  0.030 / 0.050
G26     264.1          14.3                6.0 +/-    1.79      15.1 +/-    1.79  0.090 / 0.130
G29     165.5          46.0                7.1 +/-    0.94       9.4 +/-    0.94  0.070 / 0.130