PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-20:13:00
G03     204.6          51.9               11.5 +/-    0.58      14.2 +/-    0.58  0.060 / 0.070
G07     260.7          17.9               12.5 +/-    1.27      29.0 +/-    1.27  0.070 / 0.080
G09     312.3          31.0               10.0 +/-    1.14      17.2 +/-    1.14  0.040 / 0.030
G16     84.7           64.8               11.2 +/-    0.83      12.2 +/-    0.83  0.040 / 0.030
G22     185.9          36.2               11.4 +/-    0.80      17.6 +/-    0.80  0.190 / 0.270
G23     336.5          65.0               10.7 +/-    0.94      11.7 +/-    0.94  0.220 / 0.250
G26     49.9           39.4                8.9 +/-    1.16      13.0 +/-    1.16  0.040 / 0.050
G27     129.7          14.1               12.4 +/-    1.83      31.5 +/-    1.83  0.040 / 0.050