PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-15:57:40
G07     347.1          62.4                9.8 +/-    0.48      10.9 +/-    0.48  0.070 / 0.110
G08     96.3           52.0                9.4 +/-    0.81      11.5 +/-    0.81  0.070 / 0.090
G09     192.8          73.3                9.5 +/-    0.66       9.9 +/-    0.66  0.050 / 0.030
G11     143.8          15.1               10.9 +/-    2.09      27.0 +/-    2.09  0.050 / 0.040
G23     155.7          39.5               10.0 +/-    1.11      14.7 +/-    1.11  0.140 / 0.250
G27     55.0           32.0                7.9 +/-    1.51      13.3 +/-    1.51  0.080 / 0.220
G28     236.9          26.2                9.5 +/-    4.09      18.0 +/-    4.09  0.050 / 0.070
G30     304.5          38.2                9.0 +/-    1.73      13.4 +/-    1.73  0.070 / 0.110