PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-17:42:40
G07     326.2          56.3               11.1 +/-    0.81      13.0 +/-    0.81  0.040 / 0.050
G08     113.8          47.3               13.5 +/-    0.58      17.7 +/-    0.58  0.030 / 0.040
G09     242.7          82.6               13.1 +/-    0.43      13.2 +/-    0.43  0.060 / 0.050
G16     43.5           19.3                7.9 +/-    2.68      17.7 +/-    2.68  0.060 / 0.060
G23     151.3          53.4               14.1 +/-    0.61      17.0 +/-    0.61  0.200 / 0.340
G27     68.6           36.9               11.4 +/-    0.58      17.6 +/-    0.58  0.300 / 0.210
G28     229.0          17.1               12.1 +/-    1.95      28.6 +/-    1.95  0.040 / 0.030
G30     294.2          29.4                9.8 +/-    1.81      17.4 +/-    1.81  0.030 / 0.030