PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-19:57:50
G01     238.9          27.9               10.1 +/-    1.79      18.5 +/-    1.79  0.050 / 0.040
G03     310.0          56.9                8.2 +/-    1.54       9.5 +/-    1.54  0.050 / 0.040
G14     72.0           34.2                8.7 +/-    1.08      14.0 +/-    1.08  0.090 / 0.170
G16     158.8          28.7                5.2 +/-    1.54       9.4 +/-    1.54  0.120 / 0.140
G22     274.7          75.0               10.5 +/-    1.17      10.9 +/-    1.17  0.140 / 0.180
G23     295.9          27.1                9.7 +/-    3.05      18.0 +/-    3.05  0.060 / 0.130
G26     123.6          47.2               12.3 +/-    0.48      16.1 +/-    0.48  0.070 / 0.040
G31     40.7           46.8                7.9 +/-    0.77      10.4 +/-    0.77  0.040 / 0.030
G32     87.4           15.4                9.9 +/-    2.87      24.5 +/-    2.87  0.050 / 0.110