PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-02:42:40
G01     98.2           29.5                6.9 +/-    1.04      12.2 +/-    1.04  0.040 / 0.040
G07     118.1          51.5                6.6 +/-    0.37       8.2 +/-    0.37  0.030 / 0.040
G08     41.9           14.2                3.1 +/-    2.66       7.8 +/-    2.66  0.030 / 0.040
G11     79.7           42.5                5.5 +/-    1.55       7.7 +/-    1.55  0.030 / 0.050
G13     303.0          32.4                2.5 +/-    1.77       4.1 +/-    1.77  0.020 / 0.050
G17     210.1          46.1                6.1 +/-    0.47       8.1 +/-    0.47  0.030 / 0.040
G19     211.7          21.3                5.4 +/-    1.51      11.4 +/-    1.51  0.090 / 0.420
G28     336.5          61.9                4.1 +/-    0.32       4.6 +/-    0.32  0.100 / 0.150
G30     84.1           77.1                5.9 +/-    0.52       6.0 +/-    0.52  0.080 / 0.110