PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-18:42:30
G08     277.8          21.3                8.2 +/-    2.83      17.4 +/-    2.83  0.090 / 0.210
G10     39.3           62.0                7.3 +/-    0.29       8.2 +/-    0.29  0.100 / 0.190
G14     247.9          59.2                9.3 +/-    0.48      10.7 +/-    0.48  0.110 / 0.220
G18     82.5           41.2                7.9 +/-    1.18      11.2 +/-    1.18  0.090 / 0.280
G21     150.7          19.9               10.2 +/-    1.56      22.4 +/-    1.56  0.060 / 0.140
G24     45.4           18.2                5.6 +/-    0.96      12.9 +/-    0.96  0.050 / 0.130
G27     238.7          22.4                8.5 +/-    1.89      17.7 +/-    1.89  0.030 / 0.030
G31     181.5          18.7                9.9 +/-    2.09      22.5 +/-    2.09  0.040 / 0.030
G32     292.0          75.5                7.8 +/-    0.60       8.0 +/-    0.60  0.110 / 0.300