PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-05:57:40
G10     243.3          21.3                7.4 +/-    2.90      15.8 +/-    2.90  0.040 / 0.050
G13     62.3           33.3                5.7 +/-    1.96       9.4 +/-    1.96  0.030 / 0.050
G15     102.7          56.9                7.6 +/-    0.91       8.9 +/-    0.91  0.050 / 0.110
G16     308.5          13.0                4.0 +/-    3.19      10.5 +/-    3.19  0.070 / 0.110
G20     259.1          45.0                8.1 +/-    3.36      10.9 +/-    3.36  0.150 / 0.330
G21     326.5          55.6                5.4 +/-    0.89       6.3 +/-    0.89  0.080 / 0.250
G26     280.0          17.8                6.4 +/-    0.75      15.0 +/-    0.75  0.100 / 0.230
G29     157.6          55.3                7.5 +/-    0.70       8.9 +/-    0.70  0.120 / 0.150