PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-16:28:00
G01     289.8          40.3                6.4 +/-    1.16       9.2 +/-    1.16  0.050 / 0.090
G03     312.8          20.6                8.1 +/-    3.53      17.6 +/-    3.53  0.040 / 0.070
G10     120.4          28.4                7.7 +/-    0.75      14.0 +/-    0.75  0.090 / 0.110
G11     267.4          25.4                8.7 +/-    1.39      16.8 +/-    1.39  0.090 / 0.130
G14     22.9           59.3                7.7 +/-    0.73       8.8 +/-    0.73  0.030 / 0.020
G22     314.2          40.6                6.2 +/-    2.31       8.9 +/-    2.31  0.030 / 0.030
G25     66.6           19.1                7.9 +/-    0.51      17.8 +/-    0.51  0.050 / 0.060
G26     155.7          14.2               10.5 +/-    2.22      26.6 +/-    2.22  0.060 / 0.070
G31     119.7          79.4                8.4 +/-    0.67       8.5 +/-    0.67  0.220 / 0.260
G32     52.4           40.8                7.8 +/-    1.04      11.2 +/-    1.04  0.130 / 0.320