PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-07:27:40
G10     297.6          52.4                5.2 +/-    1.73       6.4 +/-    1.73  0.040 / 0.030
G14     209.6          11.8               -4.6 +/-   12.91     -12.5 +/-   12.91  0.040 / 0.040
G15     46.0           27.4                2.7 +/-    1.52       5.0 +/-    1.52  0.160 / 0.130
G20     351.7          65.3                5.2 +/-    0.46       5.7 +/-    0.46  0.130 / 0.180
G21     97.9           72.7                4.9 +/-    1.25       5.2 +/-    1.25  0.070 / 0.050
G24     97.1           26.2                6.0 +/-    1.77      11.5 +/-    1.77  0.070 / 0.060
G27     302.7          33.0                4.1 +/-    3.04       6.8 +/-    3.04  0.150 / 0.590
G32     211.2          25.9                3.6 +/-    1.61       6.8 +/-    1.61  0.180 / 0.620