PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-21:58:00
G07     318.5          51.9               10.9 +/-    0.52      13.4 +/-    0.52  0.330 / 0.240
G08     118.8          47.4               13.5 +/-    0.70      17.7 +/-    0.70  0.110 / 0.230
G09     242.0          82.4               11.2 +/-    0.61      11.3 +/-    0.61  0.240 / 0.220
G16     43.8           16.2                8.2 +/-    3.58      19.8 +/-    3.58  0.310 / 0.440
G23     150.6          51.2               12.7 +/-    0.68      15.8 +/-    0.68  0.040 / 0.080
G27     65.4           35.4               10.2 +/-    1.31      16.1 +/-    1.31  0.040 / 0.050
G28     230.1          21.8               13.2 +/-    3.10      27.9 +/-    3.10  0.050 / 0.070
G30     295.9          31.9               11.3 +/-    2.33      19.1 +/-    2.33  0.060 / 0.070