PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-17:27:40
G01     240.1          28.7                8.1 +/-    1.40      14.7 +/-    1.40  0.100 / 0.170
G03     310.3          57.8                6.8 +/-    1.12       7.9 +/-    1.12  0.110 / 0.150
G14     70.1           35.8                6.9 +/-    1.33      10.8 +/-    1.33  0.030 / 0.050
G16     158.1          28.3               12.9 +/-    1.47      23.4 +/-    1.47  0.040 / 0.060
G22     274.7          75.6                7.0 +/-    1.11       7.2 +/-    1.11  0.030 / 0.040
G23     295.6          27.5                6.2 +/-    2.21      11.4 +/-    2.21  0.040 / 0.040
G26     123.5          46.5               11.9 +/-    1.09      15.7 +/-    1.09  0.060 / 0.150
G31     40.8           46.7                6.4 +/-    0.46       8.5 +/-    0.46  0.070 / 0.130
G32     86.7           15.5                8.0 +/-    1.53      19.6 +/-    1.53  0.080 / 0.170