PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-18:58:00
G03     208.9          57.6               12.1 +/-    0.82      14.1 +/-    0.82  0.040 / 0.080
G07     255.8          14.0               13.2 +/-    2.11      33.6 +/-    2.11  0.070 / 0.090
G09     309.3          26.0                7.8 +/-    1.83      14.9 +/-    1.83  0.040 / 0.050
G16     100.2          64.7               12.6 +/-    0.81      13.8 +/-    0.81  0.040 / 0.050
G22     187.3          42.0               13.2 +/-    1.73      18.6 +/-    1.73  0.120 / 0.290
G23     331.0          60.2               11.1 +/-    0.90      12.6 +/-    0.90  0.100 / 0.320
G26     54.4           43.8                9.6 +/-    0.68      13.2 +/-    0.68  0.180 / 0.350
G27     134.4          10.0              -13.1 +/-   30.09     -36.4 +/-   30.09  0.040 / 0.040
G31     58.8           10.5                7.9 +/-    5.32      21.7 +/-    5.32  0.050 / 0.050