PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-06:58:00
G08     311.7          17.2                4.2 +/-    2.51       9.9 +/-    2.51  0.220 / 0.330
G10     331.4          59.9                3.1 +/-    0.56       3.5 +/-    0.56  0.150 / 0.190
G14     218.5          26.1                5.0 +/-    1.78       9.6 +/-    1.78  0.060 / 0.060
G15     46.9           10.9                3.8 +/-    2.85      10.5 +/-    2.85  0.070 / 0.060
G20     62.1           46.6                5.4 +/-    0.96       7.1 +/-    0.96  0.060 / 0.060
G21     134.1          57.7                7.3 +/-    0.31       8.5 +/-    0.31  0.060 / 0.060
G24     73.8           29.9                6.8 +/-    1.61      11.9 +/-    1.61  0.030 / 0.050
G27     274.6          37.4                6.3 +/-    2.50       9.6 +/-    2.50  0.040 / 0.040
G32     223.2          54.0                7.7 +/-    1.94       9.3 +/-    1.94  0.020 / 0.030