PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-12:27:50
G07     345.5          62.1                5.4 +/-    0.42       6.0 +/-    0.42  0.150 / 0.330
G08     97.5           52.8                5.1 +/-    0.42       6.2 +/-    0.42  0.090 / 0.220
G09     190.2          71.8                7.8 +/-    0.75       8.2 +/-    0.75  0.310 / 0.570
G11     143.6          15.8                7.0 +/-    4.13      17.0 +/-    4.13  0.170 / 0.340
G23     155.2          35.6                5.5 +/-    0.72       8.7 +/-    0.72  0.030 / 0.030
G27     53.4           30.8                5.5 +/-    1.27       9.4 +/-    1.27  0.030 / 0.040
G28     237.6          26.3                5.1 +/-    2.94       9.6 +/-    2.94  0.090 / 0.100
G30     305.5          39.0                4.2 +/-    1.42       6.2 +/-    1.42  0.100 / 0.120