PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-15:13:00
G02     201.7          24.0               10.9 +/-    1.77      21.8 +/-    1.77  0.270 / 0.290
G06     168.8          59.5                9.0 +/-    0.53      10.2 +/-    0.53  0.270 / 0.520
G17     30.8           53.6                7.7 +/-    1.03       9.4 +/-    1.03  0.070 / 0.110
G19     346.5          69.1                8.4 +/-    0.64       8.9 +/-    0.64  0.080 / 0.110
G24     307.6          31.9                6.7 +/-    1.44      11.2 +/-    1.44  0.030 / 0.040
G28     94.3           36.2                7.8 +/-    1.06      12.1 +/-    1.06  0.050 / 0.050
G30     158.1          11.2               10.0 +/-    1.81      27.2 +/-    1.81  0.220 / 0.250