PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-06:28:00
G05     51.7           9.9                 2.2 +/-    3.60       6.0 +/-    3.60  0.070 / 0.330
G10     240.7          17.2                6.7 +/-    1.04      15.9 +/-    1.04  0.070 / 0.300
G13     67.5           35.6                5.9 +/-    1.45       9.2 +/-    1.45  0.240 / 0.300
G15     110.9          55.8                6.2 +/-    0.40       7.4 +/-    0.40  0.120 / 0.130
G16     307.8          14.4                0.9 +/-    1.99       2.2 +/-    1.99  0.040 / 0.040
G20     308.0          74.6                4.9 +/-    0.84       5.1 +/-    0.84  0.030 / 0.050
G21     319.9          51.7                3.8 +/-    0.46       4.7 +/-    0.46  0.050 / 0.060
G26     279.2          19.7                4.8 +/-    1.84      10.7 +/-    1.84  0.030 / 0.050
G29     160.2          64.5                5.1 +/-    0.44       5.6 +/-    0.44  0.040 / 0.010