PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-16:12:50
G01     56.6           29.2                9.9 +/-    2.05      17.6 +/-    2.05  0.040 / 0.040
G07     143.7          19.2               10.5 +/-    2.13      23.5 +/-    2.13  0.040 / 0.040
G11     46.7           20.6               10.1 +/-    2.77      21.8 +/-    2.77  0.140 / 0.180
G13     258.3          34.0               13.5 +/-    1.04      21.8 +/-    1.04  0.120 / 0.230
G15     292.8          15.5                9.3 +/-    1.35      22.9 +/-    1.35  0.140 / 0.420
G17     273.5          77.9               11.8 +/-    0.64      12.0 +/-    0.64  0.150 / 0.390
G18     40.2           10.5                8.2 +/-    2.39      22.5 +/-    2.39  0.090 / 0.130
G19     235.7          50.9               13.5 +/-    1.73      16.9 +/-    1.73  0.130 / 0.110
G28     41.2           55.6               12.1 +/-    1.30      14.4 +/-    1.30  0.070 / 0.080
G30     146.1          49.5               11.9 +/-    0.74      15.1 +/-    0.74  0.050 / 0.110