PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-23:58:10
G05     52.2           10.0                6.7 +/-    2.49      18.7 +/-    2.49  0.420 / 0.320
G10     242.0          18.8               12.6 +/-    2.22      28.4 +/-    2.22  0.360 / 0.390
G13     65.0           34.7                8.7 +/-    1.22      13.8 +/-    1.22  0.050 / 0.050
G15     113.7          56.9               10.3 +/-    0.81      12.1 +/-    0.81  0.040 / 0.050
G16     305.0          15.4                6.9 +/-    1.63      16.9 +/-    1.63  0.110 / 0.330
G20     250.2          26.6               13.7 +/-    1.67      25.8 +/-    1.67  0.100 / 0.380
G21     320.6          51.9                8.8 +/-    0.62      10.9 +/-    0.62  0.060 / 0.110
G26     277.0          19.4                9.6 +/-    2.03      21.5 +/-    2.03  0.050 / 0.100
G29     161.5          63.7                9.0 +/-    0.48       9.9 +/-    0.48  0.030 / 0.040