PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-06:57:40
G10     270.2          40.9                6.3 +/-    1.21       9.0 +/-    1.21  0.030 / 0.030
G13     40.5           15.5                3.5 +/-    2.74       8.7 +/-    2.74  0.040 / 0.040
G15     55.7           45.5                4.6 +/-    0.93       6.2 +/-    0.93  0.100 / 0.070
G16     280.9          11.0                5.5 +/-    0.94      15.2 +/-    0.94  0.100 / 0.070
G20     303.5          61.5                4.6 +/-    0.67       5.2 +/-    0.67  0.230 / 0.410
G21     17.8           73.8                5.5 +/-    0.94       5.7 +/-    0.94  0.170 / 0.490
G24     117.2          15.9                5.3 +/-    1.38      13.0 +/-    1.38  0.110 / 0.180
G27     318.3          19.5                2.5 +/-    2.11       5.6 +/-    2.11  0.140 / 0.180
G29     165.5          24.3                6.2 +/-    1.77      12.3 +/-    1.77  0.040 / 0.050