PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-05:57:50
G05     50.8           11.7                0.7 +/-    2.37       1.9 +/-    2.37  0.050 / 0.050
G10     239.3          17.2                7.9 +/-    2.22      18.7 +/-    2.22  0.060 / 0.060
G13     68.8           34.9                4.5 +/-    1.40       7.1 +/-    1.40  0.340 / 0.530
G15     113.5          55.2                5.1 +/-    0.69       6.1 +/-    0.69  0.270 / 0.430
G16     313.6          11.6                2.5 +/-   11.35       6.8 +/-   11.35  0.050 / 0.100
G20     253.2          41.0                7.9 +/-    1.96      11.3 +/-    1.96  0.070 / 0.120
G21     320.7          52.0                3.7 +/-    0.97       4.5 +/-    0.97  0.200 / 0.210
G26     285.7          18.7                4.0 +/-    1.23       9.2 +/-    1.23  0.100 / 0.180
G29     154.3          61.3                5.4 +/-    0.30       6.0 +/-    0.30  0.220 / 0.150