PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-17:13:10
G07     16.7           68.3                9.1 +/-    0.66       9.8 +/-    0.66  0.040 / 0.050
G08     64.4           49.6               10.8 +/-    0.63      13.8 +/-    0.63  0.040 / 0.050
G09     179.9          48.8               11.9 +/-    1.92      15.2 +/-    1.92  0.050 / 0.060
G11     130.5          27.8               11.6 +/-    1.10      21.3 +/-    1.10  0.050 / 0.060
G18     114.3          10.6               -2.9 +/-   31.16      -8.1 +/-   31.16  0.090 / 0.180
G23     158.6          14.7               12.1 +/-    4.15      30.4 +/-    4.15  0.090 / 0.180
G27     40.1           16.2                8.4 +/-    1.00      20.4 +/-    1.00  0.040 / 0.070
G28     260.2          46.2               11.8 +/-    0.93      15.7 +/-    0.93  0.040 / 0.060
G30     321.9          51.9               11.4 +/-    1.03      14.0 +/-    1.03  0.040 / 0.080