PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-13:42:40
G03     242.1          69.6                7.8 +/-    0.64       8.2 +/-    0.64  0.110 / 0.220
G09     301.5          15.7                4.8 +/-    1.34      11.7 +/-    1.34  0.100 / 0.240
G14     95.8           20.1                7.0 +/-    1.72      15.3 +/-    1.72  0.040 / 0.050
G16     128.9          57.2                8.8 +/-    0.81      10.3 +/-    0.81  0.040 / 0.050
G22     190.4          55.3                8.3 +/-    0.53       9.9 +/-    0.53  0.040 / 0.040
G23     320.9          51.0                7.3 +/-    1.12       9.1 +/-    1.12  0.040 / 0.050
G26     71.5           51.6                6.5 +/-    0.73       8.1 +/-    0.73  0.030 / 0.030
G31     51.3           20.0                5.5 +/-    1.90      12.2 +/-    1.90  0.030 / 0.030