PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-18:27:50
G01     221.9          12.6               10.3 +/-    2.75      27.1 +/-    2.75  0.080 / 0.110
G03     257.7          71.5                9.7 +/-    0.51      10.1 +/-    0.51  0.080 / 0.140
G09     297.6          10.7               -7.1 +/-   33.73     -19.5 +/-   33.73  0.030 / 0.050
G14     91.7           21.6               10.5 +/-    2.07      22.2 +/-    2.07  0.040 / 0.040
G16     141.1          51.2               14.3 +/-    1.14      17.8 +/-    1.14  0.120 / 0.310
G22     200.7          64.0               10.2 +/-    0.94      11.2 +/-    0.94  0.130 / 0.330
G23     313.3          43.4               11.3 +/-    0.89      15.6 +/-    0.89  0.050 / 0.070
G26     84.1           54.1               10.9 +/-    0.55      13.1 +/-    0.55  0.050 / 0.060
G31     48.0           26.1               10.6 +/-    0.88      20.2 +/-    0.88  0.120 / 0.440