PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-18:58:00
G01     320.7          12.1                7.2 +/-    5.97      19.1 +/-    5.97  0.140 / 0.200
G08     264.0          16.4               10.5 +/-    1.68      25.4 +/-    1.68  0.240 / 0.190
G10     67.5           57.3                9.0 +/-    0.67      10.5 +/-    0.67  0.080 / 0.090
G11     309.4          18.9                8.3 +/-    1.44      18.8 +/-    1.44  0.050 / 0.070
G14     276.9          68.2               10.4 +/-    0.74      11.1 +/-    0.74  0.040 / 0.040
G18     96.5           32.1                7.9 +/-    0.92      13.2 +/-    0.92  0.030 / 0.030
G27     227.8          12.8                7.9 +/-    2.89      20.8 +/-    2.89  0.030 / 0.020
G31     178.8          33.2               10.4 +/-    1.15      17.1 +/-    1.15  0.020 / 0.020
G32     348.5          72.2                9.5 +/-    0.33       9.9 +/-    0.33  0.200 / 0.290