PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-03:27:20
G02     48.0           42.2                5.3 +/-    1.04       7.5 +/-    1.04  0.110 / 0.400
G05     91.7           68.6                6.6 +/-    0.78       7.1 +/-    0.78  0.210 / 0.380
G12     189.0          50.1                7.7 +/-    0.42       9.7 +/-    0.42  0.030 / 0.050
G20     211.3          13.9                6.8 +/-    2.19      17.4 +/-    2.19  0.040 / 0.050
G25     268.0          58.0                5.6 +/-    1.78       6.5 +/-    1.78  0.030 / 0.030
G29     318.0          40.2                6.1 +/-    0.75       8.8 +/-    0.75  0.030 / 0.030