PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-04:27:50
G10     250.8          28.1                7.1 +/-    1.38      13.0 +/-    1.38  0.040 / 0.040
G13     52.9           28.9                5.3 +/-    1.42       9.4 +/-    1.42  0.040 / 0.040
G15     83.6           56.7                6.8 +/-    0.77       7.9 +/-    0.77  0.080 / 0.130
G16     298.6          14.5                5.7 +/-    1.92      14.3 +/-    1.92  0.070 / 0.110
G20     270.5          51.1                6.2 +/-    2.83       7.8 +/-    2.83  0.120 / 0.160
G21     336.3          61.0                5.7 +/-    0.56       6.4 +/-    0.56  0.130 / 0.140
G26     270.1          15.2                7.7 +/-    3.33      19.1 +/-    3.33  0.030 / 0.030
G29     161.9          46.3                6.9 +/-    0.68       9.1 +/-    0.68  0.040 / 0.030