PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-14:42:20
G02     205.9          40.9               13.2 +/-    1.10      18.9 +/-    1.10  0.060 / 0.060
G06     146.8          75.7               12.1 +/-    0.59      12.4 +/-    0.59  0.060 / 0.100
G12     311.6          20.9                7.4 +/-    0.92      15.9 +/-    0.92  0.110 / 0.180
G17     44.9           41.7                7.2 +/-    1.81      10.2 +/-    1.81  0.150 / 0.220
G19     19.3           59.4                8.9 +/-    0.96      10.2 +/-    0.96  0.030 / 0.050
G24     291.3          40.1                8.9 +/-    7.49      13.0 +/-    7.49  0.040 / 0.060
G28     109.8          25.7                9.0 +/-    1.74      17.3 +/-    1.74  0.050 / 0.070