PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-18:57:30
G07     320.8          54.1               11.8 +/-    0.82      14.1 +/-    0.82  0.040 / 0.040
G08     117.4          45.6               12.8 +/-    1.02      17.1 +/-    1.02  0.070 / 0.060
G09     267.7          82.7                9.2 +/-    0.76       9.2 +/-    0.76  0.070 / 0.060
G16     42.8           23.1                7.8 +/-    2.15      16.0 +/-    2.15  0.060 / 0.060
G23     149.7          57.4               13.6 +/-    0.80      15.8 +/-    0.80  0.170 / 0.290
G27     72.8           37.6               11.4 +/-    0.82      17.3 +/-    0.82  0.330 / 0.290
G28     227.2          14.8                9.9 +/-   15.94      24.6 +/-   15.94  0.130 / 0.160
G30     291.4          26.8               10.0 +/-    1.97      18.7 +/-    1.97  0.120 / 0.200