PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-18:57:10
G02     39.0           50.6               10.0 +/-    0.61      12.5 +/-    0.61  0.020 / 0.030
G05     119.2          68.3               11.1 +/-    0.38      11.8 +/-    0.38  0.020 / 0.030
G12     185.3          53.7               11.0 +/-    0.91      13.3 +/-    0.91  0.050 / 0.040
G25     279.0          58.4                7.0 +/-    1.05       8.1 +/-    1.05  0.040 / 0.050
G29     312.9          33.7                8.8 +/-    0.83      14.3 +/-    0.83  0.040 / 0.050