PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-19:12:40
G01     320.8          11.6               -2.9 +/-   31.66      -7.8 +/-   31.66  0.160 / 0.370
G08     264.4          16.6                9.8 +/-    0.79      23.5 +/-    0.79  0.080 / 0.180
G10     66.4           57.5                7.9 +/-    1.01       9.2 +/-    1.01  0.060 / 0.080
G11     309.7          18.7                7.3 +/-    2.16      16.6 +/-    2.16  0.050 / 0.090
G14     275.5          68.0                8.3 +/-    0.74       8.9 +/-    0.74  0.020 / 0.020
G18     95.9           32.6                8.1 +/-    1.01      13.4 +/-    1.01  0.020 / 0.020
G27     228.2          13.3                9.3 +/-    2.79      24.0 +/-    2.79  0.030 / 0.040
G31     179.0          32.4               10.7 +/-    0.70      17.9 +/-    0.70  0.030 / 0.040
G32     346.3          72.6                7.0 +/-    0.45       7.3 +/-    0.45  0.180 / 0.210