PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-19:12:50
G08     271.4          19.5                9.2 +/-    1.66      20.5 +/-    1.66  0.130 / 0.310
G10     52.2           60.4               10.4 +/-    0.76      11.7 +/-    0.76  0.130 / 0.310
G11     314.4          14.1               10.0 +/-    1.33      25.5 +/-    1.33  0.160 / 0.460
G14     258.7          63.8               10.8 +/-    0.57      11.9 +/-    0.57  0.160 / 0.420
G18     88.8           37.4               11.2 +/-    0.69      17.0 +/-    0.69  0.100 / 0.150
G21     152.2          14.2               12.4 +/-    2.30      31.4 +/-    2.30  0.070 / 0.170
G24     42.0           14.1                8.3 +/-    1.77      21.0 +/-    1.77  0.060 / 0.170
G27     233.7          18.2               11.0 +/-    1.63      25.3 +/-    1.63  0.070 / 0.160
G31     180.5          24.6               13.6 +/-    1.93      26.8 +/-    1.93  0.030 / 0.030
G32     318.5          75.5               11.5 +/-    0.68      11.8 +/-    0.68  0.030 / 0.030