PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-17:57:50
G08     272.6          19.7                8.8 +/-    1.79      19.5 +/-    1.79  0.150 / 0.540
G10     51.0           60.5                7.4 +/-    0.57       8.4 +/-    0.57  0.090 / 0.180
G11     315.1          13.2                5.6 +/-    3.37      14.5 +/-    3.37  0.020 / 0.020
G14     257.1          63.0                8.6 +/-    0.77       9.6 +/-    0.77  0.030 / 0.030
G18     88.4           37.5                7.5 +/-    1.33      11.4 +/-    1.33  0.230 / 0.290
G21     152.3          15.6               10.5 +/-    1.78      25.7 +/-    1.78  0.110 / 0.140
G24     42.3           14.4                7.4 +/-    4.13      18.7 +/-    4.13  0.100 / 0.100
G27     234.3          18.7                9.3 +/-    4.02      21.2 +/-    4.02  0.120 / 0.110
G31     180.0          24.7               10.5 +/-    2.10      20.6 +/-    2.10  0.020 / 0.020
G32     318.2          75.7                7.8 +/-    0.34       8.0 +/-    0.34  0.020 / 0.020