PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/10-12:12:40
G07     316.4          51.0                4.1 +/-    0.66       5.2 +/-    0.66  0.110 / 0.150
G08     117.7          46.5                6.3 +/-    0.69       8.3 +/-    0.69  0.120 / 0.200
G09     233.0          83.4                4.7 +/-    0.43       4.7 +/-    0.43  0.140 / 0.250
G16     43.6           14.9                5.3 +/-    1.86      13.2 +/-    1.86  0.170 / 0.190
G23     149.7          53.2                7.6 +/-    1.04       9.2 +/-    1.04  0.030 / 0.070
G27     68.7           36.4                5.8 +/-    0.77       9.0 +/-    0.77  0.050 / 0.040
G28     228.7          19.4                5.2 +/-    1.32      11.5 +/-    1.32  0.050 / 0.050
G30     292.0          26.6                5.9 +/-    2.15      11.1 +/-    2.15  0.050 / 0.050