PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-22:42:50
G07     318.6          51.9                8.7 +/-    1.46      10.7 +/-    1.46  0.040 / 0.080
G08     118.0          47.5               11.1 +/-    0.89      14.4 +/-    0.89  0.050 / 0.080
G09     241.8          82.4               10.1 +/-    1.04      10.1 +/-    1.04  0.070 / 0.290
G16     43.7           16.6                5.5 +/-    1.15      13.1 +/-    1.15  0.090 / 0.210
G23     150.8          51.7               11.5 +/-    0.85      14.3 +/-    0.85  0.050 / 0.070
G27     65.3           35.3                7.3 +/-    0.89      11.5 +/-    0.89  0.030 / 0.070
G28     230.1          21.8                9.9 +/-    1.10      20.9 +/-    1.10  0.030 / 0.070
G30     295.9          31.9                8.3 +/-    0.95      14.0 +/-    0.95  0.030 / 0.060