PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-19:28:00
G03     211.2          59.0               12.2 +/-    0.55      14.0 +/-    0.55  0.060 / 0.050
G07     254.9          13.3               12.7 +/-    3.17      32.9 +/-    3.17  0.060 / 0.060
G09     308.7          25.0               10.1 +/-    1.71      19.7 +/-    1.71  0.140 / 0.120
G16     104.3          64.5               13.1 +/-    0.99      14.4 +/-    0.99  0.120 / 0.170
G22     188.1          43.6               11.8 +/-    0.78      16.2 +/-    0.78  0.040 / 0.040
G23     329.4          58.9               10.9 +/-    0.55      12.5 +/-    0.55  0.040 / 0.030
G26     55.7           44.9               10.1 +/-    0.79      13.7 +/-    0.79  0.030 / 0.040
G31     58.0           11.6                8.5 +/-    2.74      23.0 +/-    2.74  0.030 / 0.060