PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-11:57:50
G10     244.2          20.5                4.6 +/-    4.02       9.9 +/-    4.02  0.110 / 0.370
G13     62.4           34.4                5.6 +/-    1.05       9.0 +/-    1.05  0.100 / 0.390
G15     99.7           56.8                7.5 +/-    0.43       8.8 +/-    0.43  0.050 / 0.050
G16     305.5          14.1                3.7 +/-    1.83       9.3 +/-    1.83  0.050 / 0.040
G20     32.0           60.1                5.8 +/-    0.59       6.6 +/-    0.59  0.050 / 0.040
G21     328.2          57.1                5.1 +/-    0.46       5.9 +/-    0.46  0.030 / 0.030
G26     276.2          18.2                5.6 +/-    1.80      12.8 +/-    1.80  0.130 / 0.200
G29     161.0          56.5                7.7 +/-    0.93       9.1 +/-    0.93  0.150 / 0.280