PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-15:12:40
G02     201.7          24.0                8.5 +/-    2.23      17.1 +/-    2.23  0.140 / 0.300
G06     168.8          59.5               11.8 +/-    0.79      13.5 +/-    0.79  0.170 / 0.290
G17     30.8           53.6                8.1 +/-    1.11       9.8 +/-    1.11  0.070 / 0.100
G19     346.5          69.1                8.5 +/-    0.70       9.1 +/-    0.70  0.060 / 0.120
G24     307.6          31.9                7.2 +/-    0.95      12.1 +/-    0.95  0.030 / 0.050
G28     94.3           36.2                8.0 +/-    0.84      12.4 +/-    0.84  0.040 / 0.040
G30     158.1          11.2                9.3 +/-    2.00      25.4 +/-    2.00  0.080 / 0.200