PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-21:28:00
G07     317.7          51.5               10.0 +/-    0.61      12.4 +/-    0.61  0.220 / 0.280
G08     120.2          47.0               13.3 +/-    0.83      17.4 +/-    0.83  0.180 / 0.300
G09     247.3          82.5               10.8 +/-    0.97      10.9 +/-    0.97  0.070 / 0.060
G16     43.6           16.5                8.7 +/-    3.91      20.9 +/-    3.91  0.060 / 0.060
G23     150.2          51.6               12.4 +/-    0.39      15.3 +/-    0.39  0.260 / 0.270
G27     66.2           35.6               10.5 +/-    1.10      16.5 +/-    1.10  0.230 / 0.280
G28     229.7          21.2               11.6 +/-    2.68      24.7 +/-    2.68  0.040 / 0.050
G30     295.3          31.3               10.2 +/-    1.99      17.5 +/-    1.99  0.040 / 0.060