PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-20:28:00
G03     231.5          67.5                9.1 +/-    0.40       9.8 +/-    0.40  0.050 / 0.040
G09     303.4          17.6                8.8 +/-    0.82      20.6 +/-    0.82  0.060 / 0.050
G14     100.0          14.8                9.8 +/-    3.14      24.4 +/-    3.14  0.120 / 0.290
G16     128.7          59.4               -0.3 +/-    0.43      -0.3 +/-    0.43  0.150 / 0.410
G22     193.8          54.6               10.5 +/-    0.56      12.5 +/-    0.56  0.030 / 0.050
G23     320.3          50.1                9.5 +/-    0.45      12.0 +/-    0.45  0.030 / 0.040
G26     68.4           51.5                8.2 +/-    0.89      10.2 +/-    0.89  0.250 / 0.340
G31     52.5           19.2                6.4 +/-    2.63      14.3 +/-    2.63  0.190 / 0.290