PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-13:12:40
G08     312.2          16.9                4.5 +/-    1.59      10.6 +/-    1.59  0.050 / 0.070
G10     329.4          59.5                3.5 +/-    0.49       4.0 +/-    0.49  0.050 / 0.070
G14     217.9          28.5                4.9 +/-    2.64       8.9 +/-    2.64  0.130 / 0.290
G15     46.7           10.0                3.3 +/-    3.71       9.2 +/-    3.71  0.310 / 0.330
G20     83.7           10.6                5.0 +/-    1.49      13.9 +/-    1.49  0.030 / 0.040
G21     133.4          55.5                6.6 +/-    0.62       7.8 +/-    0.62  0.030 / 0.040
G24     75.8           30.4                4.0 +/-    1.02       7.0 +/-    1.02  0.140 / 0.170
G27     274.8          37.6                5.3 +/-    1.86       8.0 +/-    1.86  0.130 / 0.160
G32     222.7          52.2                7.3 +/-    2.15       9.0 +/-    2.15  0.050 / 0.060