PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-07:12:40
G08     316.9          14.6                2.1 +/-    2.45       5.4 +/-    2.45  0.060 / 0.080
G10     316.6          57.4                4.8 +/-    1.04       5.5 +/-    1.04  0.070 / 0.070
G14     213.3          22.5                7.7 +/-    1.76      16.0 +/-    1.76  0.040 / 0.030
G15     45.7           17.1                3.5 +/-    2.55       8.2 +/-    2.55  0.040 / 0.040
G20     18.8           63.4                5.6 +/-    0.86       6.2 +/-    0.86  0.050 / 0.030
G21     122.8          64.2                7.4 +/-    0.77       8.2 +/-    0.77  0.040 / 0.030
G24     84.1           29.3                6.6 +/-    1.21      11.7 +/-    1.21  0.100 / 0.120
G27     289.1          36.9                5.9 +/-    1.62       9.0 +/-    1.62  0.070 / 0.110
G32     216.5          38.4                8.6 +/-    1.95      12.9 +/-    1.95  0.130 / 0.250