PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-08:12:50
G02     48.0           41.9                4.4 +/-    0.65       6.1 +/-    0.65  0.060 / 0.050
G05     95.2           68.9                5.0 +/-    0.85       5.3 +/-    0.85  0.030 / 0.050
G12     190.9          51.8                7.1 +/-    1.84       8.8 +/-    1.84  0.030 / 0.030
G20     203.7          37.2                4.6 +/-    2.05       7.0 +/-    2.05  0.040 / 0.030
G25     269.2          58.1                4.3 +/-    0.70       5.0 +/-    0.70  0.060 / 0.130
G29     318.7          41.5                4.6 +/-    1.43       6.5 +/-    1.43  0.070 / 0.110