PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-08:43:00
G08     304.5          21.3                5.1 +/-    1.74      10.9 +/-    1.74  0.060 / 0.050
G10     344.9          61.6                5.3 +/-    0.96       5.9 +/-    0.96  0.060 / 0.050
G14     220.7          36.5                6.7 +/-    1.12      10.4 +/-    1.12  0.030 / 0.030
G20     47.6           57.9                6.6 +/-    0.51       7.6 +/-    0.51  0.030 / 0.030
G21     139.0          49.8                7.4 +/-    0.58       9.3 +/-    0.58  0.080 / 0.120
G24     66.7           28.6                4.5 +/-    1.94       8.1 +/-    1.94  0.150 / 0.130
G27     270.1          36.2                8.6 +/-    1.40      13.4 +/-    1.40  0.090 / 0.080
G32     227.5          51.5                8.3 +/-    2.40      10.3 +/-    2.40  0.080 / 0.070