PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-15:57:30
G01     55.7           28.4                8.2 +/-    1.19      14.9 +/-    1.19  0.110 / 0.180
G06     179.0          19.2               10.0 +/-    1.42      22.4 +/-    1.42  0.080 / 0.210
G07     143.6          15.2                8.1 +/-    2.59      20.2 +/-    2.59  0.040 / 0.050
G11     45.8           17.5                6.6 +/-    2.38      15.4 +/-    2.38  0.040 / 0.040
G13     259.8          33.3               11.5 +/-    1.35      18.8 +/-    1.35  0.110 / 0.290
G15     293.2          15.5                9.1 +/-    1.41      22.5 +/-    1.41  0.120 / 0.380
G17     291.5          80.0               11.7 +/-    0.75      11.9 +/-    0.75  0.090 / 0.100
G19     238.5          56.7               12.7 +/-    2.17      14.9 +/-    2.17  0.060 / 0.130
G28     42.7           55.2                9.7 +/-    1.60      11.5 +/-    1.60  0.100 / 0.070
G30     146.3          50.4                9.0 +/-    0.94      11.3 +/-    0.94  0.110 / 0.100