PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-15:12:40
G01     318.9          18.2                7.1 +/-    1.22      16.2 +/-    1.22  0.070 / 0.070
G08     259.5          12.9                7.1 +/-    2.06      18.5 +/-    2.06  0.060 / 0.090
G10     80.1           53.4                7.7 +/-    0.71       9.4 +/-    0.71  0.120 / 0.310
G11     305.0          21.4                6.8 +/-    2.10      14.5 +/-    2.10  0.150 / 0.280
G14     294.3          69.8                8.4 +/-    0.60       8.9 +/-    0.60  0.040 / 0.050
G22     301.2          12.1                7.4 +/-    1.94      19.8 +/-    1.94  0.030 / 0.050
G31     175.4          43.1               13.3 +/-    1.17      18.5 +/-    1.17  0.160 / 0.210
G32     9.9            66.7                6.4 +/-    1.01       7.0 +/-    1.01  0.160 / 0.180