PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-19:27:50
G03     211.2          59.0               12.1 +/-    1.44      13.9 +/-    1.44  0.040 / 0.050
G07     254.9          13.3               12.1 +/-    1.99      31.4 +/-    1.99  0.030 / 0.040
G09     308.7          25.0                9.6 +/-    1.89      18.8 +/-    1.89  0.190 / 0.270
G16     104.3          64.5               13.7 +/-    1.34      15.0 +/-    1.34  0.210 / 0.340
G22     188.1          43.6               12.8 +/-    1.51      17.6 +/-    1.51  0.050 / 0.070
G23     329.4          58.9               11.5 +/-    0.82      13.2 +/-    0.82  0.050 / 0.070
G26     55.7           44.9                9.5 +/-    0.68      12.8 +/-    0.68  0.030 / 0.050
G31     58.0           11.6                9.3 +/-    2.80      25.1 +/-    2.80  0.030 / 0.040