PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-14:57:50
G01     320.2          14.1                3.9 +/-    1.01      10.0 +/-    1.01  0.170 / 0.310
G08     264.0          15.2                6.6 +/-    2.52      16.4 +/-    2.52  0.110 / 0.280
G10     72.1           55.9                5.6 +/-    0.74       6.6 +/-    0.74  0.050 / 0.080
G11     308.9          18.8                7.0 +/-    1.58      15.8 +/-    1.58  0.060 / 0.070
G14     280.2          68.1                6.8 +/-    0.71       7.2 +/-    0.71  0.040 / 0.050
G27     226.3          11.3                4.7 +/-    5.57      12.8 +/-    5.57  0.030 / 0.050
G31     176.5          37.7                9.3 +/-    0.96      14.0 +/-    0.96  0.150 / 0.310
G32     359.6          70.1                6.6 +/-    1.03       7.0 +/-    1.03  0.170 / 0.230