PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-21:28:10
G10     284.8          47.3                8.6 +/-    0.85      11.2 +/-    0.85  0.060 / 0.140
G15     50.2           41.4                7.4 +/-    0.24      10.5 +/-    0.24  0.070 / 0.130
G20     330.1          64.9                6.6 +/-    1.36       7.3 +/-    1.36  0.040 / 0.060
G21     58.7           77.2                9.0 +/-    0.80       9.2 +/-    0.80  0.040 / 0.050
G24     104.3          22.5               11.3 +/-    1.00      23.5 +/-    1.00  0.090 / 0.190
G27     310.0          28.6                7.1 +/-    1.03      12.8 +/-    1.03  0.090 / 0.210
G29     168.7          16.5               10.9 +/-    3.93      26.0 +/-    3.93  0.030 / 0.050
G32     207.1          24.1               11.0 +/-    1.13      21.9 +/-    1.13  0.030 / 0.060