PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-08:42:50
G08     299.2          22.6                5.3 +/-    0.83      11.0 +/-    0.83  0.050 / 0.050
G10     356.7          62.5                4.6 +/-    1.02       5.1 +/-    1.02  0.050 / 0.070
G14     224.5          41.7                7.0 +/-    2.29       9.9 +/-    2.29  0.030 / 0.030
G20     56.7           55.2                5.8 +/-    0.80       6.8 +/-    0.80  0.030 / 0.030
G21     142.9          44.5                9.0 +/-    0.81      12.2 +/-    0.81  0.090 / 0.120
G24     60.9           27.1                4.3 +/-    1.46       8.0 +/-    1.46  0.120 / 0.120
G27     263.2          34.6                8.6 +/-    0.96      13.7 +/-    0.96  0.070 / 0.030
G32     233.3          56.5                6.9 +/-    1.69       8.1 +/-    1.69  0.070 / 0.040