PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-16:28:00
G07     17.3           67.1                9.3 +/-    1.00      10.1 +/-    1.00  0.050 / 0.060
G08     72.5           50.8               10.0 +/-    0.81      12.4 +/-    0.81  0.060 / 0.080
G09     182.6          58.3               11.1 +/-    0.45      12.8 +/-    0.45  0.030 / 0.040
G11     134.3          24.1               13.3 +/-    4.37      26.6 +/-    4.37  0.030 / 0.030
G23     159.0          25.3                9.7 +/-    1.98      18.7 +/-    1.98  0.090 / 0.100
G27     44.4           23.2                7.8 +/-    1.82      16.0 +/-    1.82  0.060 / 0.130
G28     248.8          36.6               11.1 +/-    1.89      17.1 +/-    1.89  0.090 / 0.130
G30     316.3          47.9                9.5 +/-    0.72      12.3 +/-    0.72  0.200 / 0.110