PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-18:42:40
G01     222.4          13.0                8.7 +/-   15.55      22.6 +/-   15.55  0.060 / 0.060
G03     260.7          71.4                9.3 +/-    0.92       9.7 +/-    0.92  0.040 / 0.070
G09     297.2          10.3              -14.8 +/-   21.70     -41.2 +/-   21.70  0.080 / 0.110
G14     91.2           21.9                8.7 +/-    0.82      18.2 +/-    0.82  0.080 / 0.120
G16     142.0          50.6               14.5 +/-    0.75      18.1 +/-    0.75  0.040 / 0.050
G22     201.8          64.7                9.2 +/-    1.56      10.1 +/-    1.56  0.040 / 0.060
G23     312.7          42.8               11.5 +/-    1.04      16.0 +/-    1.04  0.100 / 0.280
G26     85.4           54.3                9.5 +/-    0.46      11.4 +/-    0.46  0.110 / 0.350
G31     47.7           26.7                9.1 +/-    1.22      17.0 +/-    1.22  0.060 / 0.100