PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-08:42:40
G08     280.1          22.3                8.1 +/-    0.88      16.9 +/-    0.88  0.030 / 0.030
G10     37.4           61.5                5.2 +/-    0.76       5.8 +/-    0.76  0.050 / 0.030
G14     243.6          58.0                8.0 +/-    1.55       9.2 +/-    1.55  0.080 / 0.150
G18     316.7          22.5                2.8 +/-    2.15       5.8 +/-    2.15  0.070 / 0.210
G20     81.8           44.7                6.7 +/-    0.80       9.0 +/-    0.80  0.100 / 0.200
G21     151.5          26.5                6.5 +/-    1.27      12.3 +/-    1.27  0.120 / 0.180
G24     45.8           17.9                4.0 +/-    1.94       9.2 +/-    1.94  0.060 / 0.070
G27     243.7          24.9                6.7 +/-    1.85      13.2 +/-    1.85  0.050 / 0.070
G31     181.3          17.2                6.8 +/-    3.89      16.0 +/-    3.89  0.120 / 0.280
G32     270.9          72.0                6.7 +/-    0.40       7.0 +/-    0.40  0.130 / 0.190