PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-08:13:10
G08     293.6          21.8                5.2 +/-    1.51      11.0 +/-    1.51  0.060 / 0.130
G10     12.7           63.1                5.1 +/-    0.64       5.7 +/-    0.64  0.070 / 0.100
G14     231.6          44.0               10.4 +/-    1.71      14.2 +/-    1.71  0.090 / 0.140
G18     317.8          11.1               -7.0 +/-   13.54     -19.1 +/-   13.54  0.090 / 0.140
G20     85.0           30.4                5.3 +/-    1.08       9.2 +/-    1.08  0.060 / 0.120
G21     147.8          38.1                6.1 +/-    0.60       9.1 +/-    0.60  0.070 / 0.100
G24     53.7           24.3                3.2 +/-    0.76       6.3 +/-    0.76  0.030 / 0.030
G27     251.2          30.2                7.7 +/-    1.20      13.4 +/-    1.20  0.030 / 0.030
G31     182.1          10.2               -6.7 +/-    9.52     -18.5 +/-    9.52  0.060 / 0.110
G32     254.2          71.5                7.7 +/-    0.47       8.1 +/-    0.47  0.040 / 0.080