PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-15:28:10
G02     339.3          77.5                8.1 +/-    0.93       8.3 +/-    0.93  0.050 / 0.090
G05     165.6          35.3               11.3 +/-    1.35      17.9 +/-    1.35  0.040 / 0.080
G06     42.8           35.8                5.6 +/-    0.76       8.8 +/-    0.76  0.120 / 0.230
G12     298.8          77.9                7.6 +/-    0.93       7.8 +/-    0.93  0.130 / 0.240
G19     76.0           28.7                7.2 +/-    0.60      13.0 +/-    0.60  0.030 / 0.030
G24     223.0          19.3                9.4 +/-    1.27      21.0 +/-    1.27  0.030 / 0.030
G25     316.0          34.6                8.1 +/-    1.65      13.0 +/-    1.65  0.070 / 0.110
G29     288.6          10.4               -8.4 +/-   17.20     -23.2 +/-   17.20  0.060 / 0.110