PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-17:27:50
G01     255.8          37.2               10.6 +/-    2.06      16.2 +/-    2.06  0.030 / 0.040
G03     316.5          43.2                9.3 +/-    1.83      12.8 +/-    1.83  0.030 / 0.030
G11     243.1          14.8               10.4 +/-    2.18      26.0 +/-    2.18  0.040 / 0.030
G14     55.0           44.3               10.4 +/-    1.47      14.2 +/-    1.47  0.040 / 0.030
G22     308.2          64.2               10.0 +/-    0.94      10.9 +/-    0.94  0.100 / 0.140
G23     284.3          18.2                8.9 +/-    4.64      20.5 +/-    4.64  0.060 / 0.150
G25     43.1           12.6                7.8 +/-    2.65      20.5 +/-    2.65  0.070 / 0.080
G26     139.0          35.0               12.7 +/-    1.58      20.2 +/-    1.58  0.070 / 0.090
G31     42.2           61.8                9.3 +/-    0.64      10.5 +/-    0.64  0.080 / 0.090
G32     74.5           24.6               11.0 +/-    1.70      21.6 +/-    1.70  0.090 / 0.110