PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-19:42:40
G03     210.1          57.9               12.0 +/-    0.94      13.9 +/-    0.94  0.040 / 0.050
G07     255.8          14.0               12.4 +/-    1.93      31.5 +/-    1.93  0.040 / 0.050
G09     309.3          26.0                6.8 +/-    2.67      13.0 +/-    2.67  0.140 / 0.430
G16     101.3          64.8               14.0 +/-    1.47      15.3 +/-    1.47  0.110 / 0.350
G22     187.8          42.4               13.2 +/-    1.64      18.4 +/-    1.64  0.050 / 0.070
G23     330.4          59.8               12.5 +/-    1.10      14.3 +/-    1.10  0.060 / 0.090
G26     54.6           44.1                9.8 +/-    1.02      13.4 +/-    1.02  0.030 / 0.050
G31     58.7           10.8                9.6 +/-    2.90      26.2 +/-    2.90  0.030 / 0.060