PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-13:13:10
G01     242.0          30.1                8.5 +/-    1.76      14.9 +/-    1.76  0.080 / 0.090
G03     312.2          54.7                6.1 +/-    1.32       7.3 +/-    1.32  0.080 / 0.100
G14     66.6           38.8                6.3 +/-    1.85       9.3 +/-    1.85  0.050 / 0.040
G16     157.5          27.4                9.1 +/-    1.43      16.8 +/-    1.43  0.050 / 0.050
G18     215.6          21.0                7.0 +/-    2.28      15.0 +/-    2.28  0.110 / 0.160
G23     295.6          29.0                6.2 +/-    2.14      11.0 +/-    2.14  0.090 / 0.130
G26     124.3          45.4               10.2 +/-    0.78      13.7 +/-    0.78  0.070 / 0.110
G31     41.0           47.4                4.7 +/-    0.66       6.2 +/-    0.66  0.130 / 0.130
G32     85.4           16.1                6.8 +/-    1.11      16.6 +/-    1.11  0.040 / 0.040