PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-15:43:10
G02     32.8           55.0                6.2 +/-    1.10       7.4 +/-    1.10  0.040 / 0.050
G05     140.5          63.1                8.6 +/-    0.75       9.5 +/-    0.75  0.060 / 0.050
G06     54.7           13.3                3.9 +/-    3.58      10.1 +/-    3.58  0.030 / 0.040
G12     194.2          65.6                7.2 +/-    0.56       7.8 +/-    0.56  0.020 / 0.030
G25     295.0          53.8                6.7 +/-    3.02       8.1 +/-    3.02  0.140 / 0.260
G29     308.1          28.8                6.4 +/-    0.65      11.4 +/-    0.65  0.110 / 0.280