PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-21:12:50
G01     270.2          40.8                8.3 +/-    2.73      11.9 +/-    2.73  0.050 / 0.040
G03     315.8          29.9                7.7 +/-    1.36      13.4 +/-    1.36  0.050 / 0.040
G10     130.0          17.1               10.7 +/-    1.09      25.2 +/-    1.09  0.020 / 0.020
G11     250.7          20.5                9.0 +/-    1.71      19.5 +/-    1.71  0.030 / 0.030
G14     44.1           49.7                7.0 +/-    0.60       8.9 +/-    0.60  0.110 / 0.270
G22     314.0          51.6                7.0 +/-    0.92       8.7 +/-    0.92  0.100 / 0.160
G25     51.7           16.6                8.2 +/-    3.05      19.6 +/-    3.05  0.060 / 0.060
G26     149.3          24.6               13.9 +/-    1.51      27.3 +/-    1.51  0.060 / 0.070
G31     55.9           75.4                7.6 +/-    0.59       7.8 +/-    0.59  0.050 / 0.050
G32     64.2           32.9                7.6 +/-    1.99      12.6 +/-    1.99  0.040 / 0.060