PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-18:57:40
G07     326.1          56.1               12.4 +/-    0.57      14.6 +/-    0.57  0.030 / 0.050
G08     112.2          47.7               13.9 +/-    0.82      18.0 +/-    0.82  0.040 / 0.040
G09     235.1          82.5               12.8 +/-    0.43      12.9 +/-    0.43  0.030 / 0.030
G16     43.5           19.7                9.8 +/-    2.53      21.8 +/-    2.53  0.030 / 0.020
G23     151.8          53.3               13.5 +/-    0.68      16.4 +/-    0.68  0.040 / 0.050
G27     68.0           36.8               12.2 +/-    1.16      18.8 +/-    1.16  0.050 / 0.060
G28     229.4          17.9               12.0 +/-    3.07      27.8 +/-    3.07  0.110 / 0.370
G30     294.4          29.3               10.2 +/-    0.98      18.2 +/-    0.98  0.140 / 0.340