PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/07-19:42:40
G07     320.3          53.8               13.5 +/-    0.81      16.3 +/-    0.81  0.040 / 0.050
G08     117.0          45.6               16.8 +/-    0.39      22.4 +/-    0.39  0.040 / 0.070
G09     266.0          82.8               13.7 +/-    0.80      13.8 +/-    0.80  0.070 / 0.060
G16     42.8           22.8               10.1 +/-    1.90      20.8 +/-    1.90  0.200 / 0.140
G23     149.8          57.8               16.9 +/-    0.98      19.6 +/-    0.98  0.190 / 0.190
G27     73.0           37.7               14.0 +/-    0.99      21.2 +/-    0.99  0.310 / 0.320
G28     227.3          15.0               16.9 +/-   10.02      42.0 +/-   10.02  0.030 / 0.020
G30     291.3          26.6               11.9 +/-    2.63      22.4 +/-    2.63  0.040 / 0.030