PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-15:42:50
G01     307.9          32.5                8.0 +/-    1.55      13.3 +/-    1.55  0.160 / 0.130
G10     105.0          41.1                9.0 +/-    0.89      12.9 +/-    0.89  0.070 / 0.150
G11     286.0          26.9                7.1 +/-    1.13      13.3 +/-    1.13  0.150 / 0.170
G14     350.3          67.7                7.9 +/-    0.35       8.5 +/-    0.35  0.070 / 0.110
G22     309.7          26.6                7.7 +/-    1.25      14.4 +/-    1.25  0.030 / 0.040
G25     83.8           16.5                8.9 +/-    2.07      21.4 +/-    2.07  0.030 / 0.030
G31     166.1          64.6               10.8 +/-    0.45      11.8 +/-    0.45  0.040 / 0.040
G32     36.0           52.5                7.5 +/-    0.91       9.2 +/-    0.91  0.040 / 0.040