PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-18:27:40
G01     229.9          20.3               11.9 +/-    2.79      26.1 +/-    2.79  0.030 / 0.030
G03     292.7          67.5               12.3 +/-    0.91      13.2 +/-    0.91  0.030 / 0.030
G14     82.0           28.2               11.2 +/-    2.17      20.4 +/-    2.17  0.070 / 0.070
G16     151.2          40.3               13.3 +/-    0.81      19.2 +/-    0.81  0.080 / 0.060
G22     224.2          73.6               13.0 +/-    0.57      13.4 +/-    0.57  0.050 / 0.070
G23     304.7          35.3               11.2 +/-    1.57      17.7 +/-    1.57  0.050 / 0.070
G26     104.9          53.0               12.1 +/-    0.71      14.8 +/-    0.71  0.090 / 0.180
G31     43.7           35.6               10.5 +/-    1.15      16.4 +/-    1.15  0.090 / 0.180