PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-17:12:30
G03     227.4          68.0               14.3 +/-    0.60      15.3 +/-    0.60  0.110 / 0.290
G09     302.7          16.7                9.2 +/-    2.82      22.0 +/-    2.82  0.100 / 0.290
G14     98.5           16.9               11.8 +/-    2.40      27.9 +/-    2.40  0.140 / 0.300
G16     127.2          58.8               15.2 +/-    0.51      17.5 +/-    0.51  0.330 / 0.180
G22     191.5          54.2               14.0 +/-    0.63      16.8 +/-    0.63  0.070 / 0.050
G23     321.0          50.9               13.2 +/-    0.61      16.5 +/-    0.61  0.050 / 0.050
G31     52.3           18.9               10.6 +/-    2.56      23.9 +/-    2.56  0.030 / 0.040