PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-22:12:30
G07     317.8          51.5                7.7 +/-    1.43       9.6 +/-    1.43  0.070 / 0.220
G08     119.4          47.0               10.3 +/-    0.98      13.5 +/-    0.98  0.070 / 0.240
G09     247.2          82.5                7.0 +/-    1.22       7.1 +/-    1.22  0.050 / 0.050
G16     43.6           16.9                5.6 +/-    1.24      13.3 +/-    1.24  0.030 / 0.060
G23     150.3          52.1                8.0 +/-    0.56       9.9 +/-    0.56  0.140 / 0.370
G27     66.1           35.5                6.9 +/-    0.35      10.8 +/-    0.35  0.150 / 0.350
G28     229.7          21.3                9.6 +/-    1.98      20.5 +/-    1.98  0.050 / 0.070
G30     295.6          31.8                8.0 +/-    0.64      13.5 +/-    0.64  0.040 / 0.090