PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-16:42:40
G07     30.6           67.8                9.2 +/-    0.78       9.9 +/-    0.78  0.070 / 0.120
G08     65.1           48.7                9.7 +/-    0.59      12.4 +/-    0.59  0.080 / 0.150
G09     181.2          52.7               12.3 +/-    0.41      15.0 +/-    0.41  0.020 / 0.030
G11     130.3          27.5               10.4 +/-    1.48      19.3 +/-    1.48  0.030 / 0.030
G23     159.7          20.4                9.2 +/-    1.70      20.0 +/-    1.70  0.050 / 0.060
G27     41.7           19.6                8.4 +/-    1.79      18.8 +/-    1.79  0.040 / 0.060
G28     253.9          40.2               10.3 +/-    1.83      14.9 +/-    1.83  0.150 / 0.160
G30     320.8          51.6                9.5 +/-    0.57      11.7 +/-    0.57  0.170 / 0.130