PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-05:12:50
G05     49.4           14.6                3.6 +/-    1.46       9.1 +/-    1.46  0.050 / 0.060
G10     236.9          14.5                5.5 +/-    1.75      13.8 +/-    1.75  0.080 / 0.060
G13     73.3           35.5                6.2 +/-    1.36       9.8 +/-    1.36  0.060 / 0.100
G15     119.8          53.4                5.6 +/-    1.08       6.8 +/-    1.08  0.070 / 0.120
G16     316.3          10.6               -5.6 +/-    9.03     -15.5 +/-    9.03  0.140 / 0.290
G20     249.6          38.3                5.5 +/-    1.56       8.2 +/-    1.56  0.410 / 0.510
G21     316.6          49.3                4.0 +/-    1.51       5.1 +/-    1.51  0.180 / 0.230
G26     289.1          19.2                3.6 +/-    0.98       8.1 +/-    0.98  0.100 / 0.240
G29     151.7          66.0                6.2 +/-    1.12       6.8 +/-    1.12  0.110 / 0.280