PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:58:00
G01     59.4           30.0               11.2 +/-    0.93      19.6 +/-    0.93  0.030 / 0.050
G06     179.8          15.8               15.8 +/-    1.22      38.5 +/-    1.22  0.030 / 0.040
G07     142.1          18.5               10.9 +/-    2.35      24.9 +/-    2.35  0.070 / 0.290
G11     47.2           20.5                7.6 +/-    1.82      16.6 +/-    1.82  0.100 / 0.280
G13     264.2          34.7               13.2 +/-    0.81      21.0 +/-    0.81  0.030 / 0.040
G15     296.8          15.3               11.0 +/-    2.76      27.1 +/-    2.76  0.030 / 0.040
G17     269.7          78.9               12.3 +/-    1.06      12.5 +/-    1.06  0.080 / 0.150
G19     233.8          53.4               13.9 +/-    2.00      16.8 +/-    2.00  0.070 / 0.130
G28     36.7           56.4                9.9 +/-    1.02      11.7 +/-    1.02  0.070 / 0.080
G30     143.7          54.3               12.7 +/-    1.62      15.3 +/-    1.62  0.050 / 0.110