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                7.9 +/-    0.62       8.4 +/-    0.62  0.070 / 0.110
G08     65.1           48.7                8.6 +/-    0.33      11.0 +/-    0.33  0.080 / 0.120
G09     181.2          52.7                8.7 +/-    2.64      10.6 +/-    2.64  0.090 / 0.190
G11     130.3          27.5               10.9 +/-    1.03      20.2 +/-    1.03  0.080 / 0.180
G23     159.7          20.4               10.7 +/-    1.30      23.4 +/-    1.30  0.030 / 0.040
G27     41.7           19.6                7.7 +/-    1.22      17.1 +/-    1.22  0.030 / 0.040
G28     253.9          40.2                8.8 +/-    0.64      12.8 +/-    0.64  0.080 / 0.150
G30     320.8          51.6                9.3 +/-    1.17      11.5 +/-    1.17  0.090 / 0.130