PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-18:58:00
G01     253.6          36.3               11.6 +/-    2.32      18.0 +/-    2.32  0.030 / 0.040
G03     316.2          43.8                9.7 +/-    0.96      13.3 +/-    0.96  0.040 / 0.040
G11     240.8          13.9               10.8 +/-    1.79      27.5 +/-    1.79  0.050 / 0.080
G14     57.5           42.7                9.5 +/-    1.06      13.2 +/-    1.06  0.050 / 0.070
G22     306.7          64.9               10.3 +/-    0.84      11.2 +/-    0.84  0.150 / 0.250
G23     285.4          18.6               10.5 +/-    1.31      23.9 +/-    1.31  0.200 / 0.290
G25     41.6           11.6                8.0 +/-    3.29      21.6 +/-    3.29  0.030 / 0.040
G26     138.3          36.3               14.4 +/-    0.74      22.3 +/-    0.74  0.030 / 0.040
G31     41.4           60.6               10.3 +/-    0.35      11.6 +/-    0.35  0.110 / 0.080
G32     75.8           23.9               10.5 +/-    2.22      21.1 +/-    2.22  0.110 / 0.090