PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-18:58:10
G03     242.6          70.2               12.8 +/-    0.92      13.5 +/-    0.92  0.050 / 0.040
G09     300.5          13.9               11.9 +/-    2.79      30.4 +/-    2.79  0.050 / 0.050
G14     95.7           18.5               11.9 +/-    2.28      27.1 +/-    2.28  0.030 / 0.040
G16     135.3          55.5               14.6 +/-    0.37      17.3 +/-    0.37  0.030 / 0.050
G22     196.3          59.3               14.1 +/-    0.63      16.2 +/-    0.63  0.090 / 0.190
G23     316.8          46.8               14.2 +/-    0.72      18.7 +/-    0.72  0.130 / 0.220
G26     75.8           53.1               12.3 +/-    0.68      14.9 +/-    0.68  0.110 / 0.240
G31     50.2           22.5                9.6 +/-    2.56      20.0 +/-    2.56  0.110 / 0.240