PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-17:27:50
G02     46.0           45.0                7.4 +/-    1.35      10.0 +/-    1.35  0.050 / 0.060
G05     95.5           70.7                8.1 +/-    0.83       8.6 +/-    0.83  0.060 / 0.050
G12     184.7          44.5               10.1 +/-    1.00      13.7 +/-    1.00  0.030 / 0.030
G25     256.5          58.6                9.5 +/-    1.53      10.9 +/-    1.53  0.030 / 0.030
G29     319.4          41.9                7.9 +/-    1.06      11.1 +/-    1.06  0.050 / 0.040