PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-18:27:50
G08     275.4          20.7                6.4 +/-    1.10      14.0 +/-    1.10  0.060 / 0.110
G10     44.6           61.4                6.8 +/-    0.39       7.6 +/-    0.39  0.080 / 0.150
G11     316.5          11.3                6.1 +/-    2.12      16.6 +/-    2.12  0.090 / 0.330
G14     251.8          61.0                8.4 +/-    0.76       9.4 +/-    0.76  0.090 / 0.340
G18     85.2           39.6                7.6 +/-    0.70      11.1 +/-    0.70  0.050 / 0.130
G21     151.5          18.0                7.3 +/-    1.29      16.8 +/-    1.29  0.070 / 0.100
G24     43.9           16.6                7.5 +/-    0.92      17.9 +/-    0.92  0.100 / 0.200
G27     236.7          20.7                7.9 +/-    1.12      17.1 +/-    1.12  0.080 / 0.270
G31     180.9          21.3               10.4 +/-    2.45      22.3 +/-    2.45  0.030 / 0.030
G32     303.5          75.8                8.5 +/-    0.75       8.8 +/-    0.75  0.040 / 0.040