PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-04:42:30
G03     257.1          69.5                6.5 +/-    0.56       6.9 +/-    0.56  0.030 / 0.050
G09     302.4          19.4                4.2 +/-    1.90       9.5 +/-    1.90  0.030 / 0.050
G14     95.6           18.1                4.5 +/-    0.74      10.3 +/-    0.74  0.030 / 0.050
G16     131.2          55.6                7.2 +/-    0.58       8.5 +/-    0.58  0.030 / 0.050
G22     200.8          60.8                5.8 +/-    1.07       6.6 +/-    1.07  0.120 / 0.320
G23     315.0          44.6                5.7 +/-    1.18       7.7 +/-    1.18  0.140 / 0.330
G26     75.7           52.8                5.7 +/-    0.96       6.9 +/-    0.96  0.030 / 0.060
G31     50.2           22.6                2.2 +/-    1.11       4.5 +/-    1.11  0.040 / 0.060