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                4.0 +/-    1.74      10.3 +/-    1.74  0.200 / 0.290
G08     264.0          15.2                3.7 +/-    4.67       9.2 +/-    4.67  0.220 / 0.260
G10     72.1           55.9                5.3 +/-    0.36       6.3 +/-    0.36  0.050 / 0.050
G11     308.9          18.8                5.3 +/-    1.90      12.1 +/-    1.90  0.050 / 0.050
G14     280.2          68.1                5.2 +/-    0.58       5.6 +/-    0.58  0.030 / 0.030
G27     226.3          11.3                6.9 +/-    1.85      18.6 +/-    1.85  0.030 / 0.040
G31     176.5          37.7                8.0 +/-    1.81      12.2 +/-    1.81  0.130 / 0.260
G32     359.6          70.1                5.5 +/-    0.17       5.8 +/-    0.17  0.160 / 0.270