PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-02:58:00
G01     90.3           31.8                5.6 +/-    0.89       9.4 +/-    0.89  0.030 / 0.050
G07     125.4          45.6                7.2 +/-    0.32       9.6 +/-    0.32  0.040 / 0.040
G11     70.8           40.7                5.0 +/-    0.96       7.2 +/-    0.96  0.050 / 0.050
G13     295.7          35.3                6.3 +/-    3.31       9.9 +/-    3.31  0.060 / 0.050
G15     314.9          10.5               -6.4 +/-   12.27     -17.6 +/-   12.27  0.030 / 0.040
G17     214.7          53.2                7.0 +/-    0.77       8.5 +/-    0.77  0.040 / 0.040
G19     214.6          27.7                5.9 +/-    1.36      10.8 +/-    1.36  0.350 / 0.280
G28     350.5          61.7                4.7 +/-    0.56       5.2 +/-    0.56  0.080 / 0.100
G30     108.6          72.7                6.1 +/-    1.13       6.3 +/-    1.13  0.090 / 0.100