PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-21:27:20
G02     36.5           52.6               11.5 +/-    0.73      14.1 +/-    0.73  0.030 / 0.030
G05     128.0          66.0               12.2 +/-    0.43      13.2 +/-    0.43  0.030 / 0.030
G06     57.1           10.7                9.0 +/-    1.37      24.7 +/-    1.37  0.130 / 0.210
G12     189.3          60.0               12.2 +/-    0.35      13.9 +/-    0.35  0.130 / 0.280
G25     288.4          56.4               11.6 +/-    2.81      13.6 +/-    2.81  0.040 / 0.050
G29     310.2          30.6               11.8 +/-    1.82      20.4 +/-    1.82  0.040 / 0.040