PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-16:12:40
G01     48.3           23.8                8.4 +/-    0.64      16.9 +/-    0.64  0.050 / 0.110
G06     177.1          27.6               12.6 +/-    1.35      23.2 +/-    1.35  0.050 / 0.130
G11     43.5           10.5                7.8 +/-    1.77      21.6 +/-    1.77  0.040 / 0.060
G13     250.3          29.1               10.9 +/-    2.16      19.5 +/-    2.16  0.040 / 0.060
G15     284.9          14.9                9.3 +/-    1.88      23.1 +/-    1.88  0.030 / 0.030
G17     338.6          77.3               12.0 +/-    0.79      12.2 +/-    0.79  0.030 / 0.030
G19     252.7          64.0               10.6 +/-    0.92      11.6 +/-    0.92  0.060 / 0.210
G28     56.0           51.9               10.5 +/-    0.53      12.9 +/-    0.53  0.060 / 0.170
G30     150.9          41.4               12.2 +/-    0.88      17.3 +/-    0.88  0.110 / 0.270