PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-04:42:40
G01     319.5          16.8                7.4 +/-    2.86      17.6 +/-    2.86  0.180 / 0.280
G08     258.4          13.9               10.5 +/-    2.70      26.8 +/-    2.70  0.170 / 0.240
G10     77.7           53.8                4.4 +/-    0.56       5.3 +/-    0.56  0.080 / 0.160
G11     304.1          22.6                7.9 +/-    1.06      16.3 +/-    1.06  0.070 / 0.210
G14     287.1          68.9                6.2 +/-    0.36       6.6 +/-    0.36  0.030 / 0.050
G18     305.9          39.2                6.2 +/-    0.78       9.2 +/-    0.78  0.030 / 0.050
G20     96.7           45.7               12.8 +/-    1.13      17.1 +/-    1.13  0.110 / 0.370
G31     174.3          42.4                7.2 +/-    1.20      10.0 +/-    1.20  0.110 / 0.350
G32     9.3            67.3                4.9 +/-    0.55       5.3 +/-    0.55  0.090 / 0.080