PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-10:58:10
G10     243.7          20.0                4.0 +/-    1.35       8.7 +/-    1.35  0.030 / 0.050
G13     63.1           34.6                2.8 +/-    0.68       4.5 +/-    0.68  0.030 / 0.050
G15     101.3          56.7                5.3 +/-    0.70       6.2 +/-    0.70  0.040 / 0.060
G16     305.7          14.2                2.9 +/-    2.04       7.3 +/-    2.04  0.040 / 0.060
G20     30.5           61.4                3.2 +/-    0.32       3.5 +/-    0.32  0.060 / 0.130
G21     326.5          56.1                2.2 +/-    0.82       2.6 +/-    0.82  0.070 / 0.120
G26     276.5          18.4                3.3 +/-    1.47       7.7 +/-    1.47  0.160 / 0.390
G29     160.9          57.9                6.7 +/-    0.51       7.8 +/-    0.51  0.120 / 0.330