PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-19:27:50
G01     319.2          17.2                8.0 +/-    2.09      18.7 +/-    2.09  0.050 / 0.090
G08     258.3          13.5                8.3 +/-    4.10      21.5 +/-    4.10  0.040 / 0.080
G10     78.0           54.2                8.0 +/-    1.23       9.6 +/-    1.23  0.030 / 0.020
G11     304.4          22.3                8.0 +/-    2.08      16.7 +/-    2.08  0.020 / 0.020
G14     295.0          70.5                6.7 +/-    0.31       7.1 +/-    0.31  0.060 / 0.040
G18     101.9          28.0                9.8 +/-    1.04      17.8 +/-    1.04  0.050 / 0.040
G31     177.8          39.7                9.8 +/-    0.71      14.3 +/-    0.71  0.130 / 0.400
G32     3.6            68.5                6.2 +/-    0.58       6.6 +/-    0.58  0.100 / 0.280