PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-23:58:00
G05     52.0           10.3                6.9 +/-    2.77      19.0 +/-    2.77  0.130 / 0.320
G10     241.6          18.5               11.9 +/-    1.71      27.1 +/-    1.71  0.090 / 0.420
G13     65.5           34.8                8.7 +/-    0.89      13.8 +/-    0.89  0.150 / 0.700
G15     114.5          56.7                9.6 +/-    0.66      11.3 +/-    0.66  0.120 / 0.630
G16     305.5          15.3                7.4 +/-    4.74      18.3 +/-    4.74  0.130 / 0.220
G20     249.8          26.3                8.9 +/-    1.19      16.9 +/-    1.19  0.100 / 0.300
G21     320.1          51.6                9.8 +/-    1.22      12.2 +/-    1.22  0.060 / 0.070
G26     277.5          19.5                8.6 +/-    1.76      19.2 +/-    1.76  0.040 / 0.060
G29     161.3          64.2                8.4 +/-    1.18       9.2 +/-    1.18  0.030 / 0.040