PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-15:42:40
G07     347.9          62.6               12.2 +/-    0.46      13.6 +/-    0.46  0.080 / 0.190
G08     95.4           52.1               11.0 +/-    0.74      13.5 +/-    0.74  0.080 / 0.240
G09     191.9          72.7               12.7 +/-    0.39      13.2 +/-    0.39  0.050 / 0.040
G11     143.5          15.5               15.4 +/-    3.57      37.8 +/-    3.57  0.030 / 0.040
G23     155.9          38.7               13.7 +/-    1.42      20.3 +/-    1.42  0.160 / 0.590
G27     54.3           31.6                9.0 +/-    0.98      15.3 +/-    0.98  0.230 / 0.630
G28     237.4          26.6               12.7 +/-    3.96      23.9 +/-    3.96  0.070 / 0.110
G30     305.1          38.8               10.2 +/-    1.42      15.1 +/-    1.42  0.090 / 0.090