PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-19:27:20
G02     39.8           49.9                7.1 +/-    0.61       9.0 +/-    0.61  0.030 / 0.040
G05     116.9          68.5                8.6 +/-    0.52       9.2 +/-    0.52  0.030 / 0.040
G12     185.5          53.3                7.6 +/-    1.30       9.2 +/-    1.30  0.060 / 0.060
G25     278.0          58.4                8.1 +/-    0.73       9.3 +/-    0.73  0.040 / 0.070
G29     313.3          34.2                5.4 +/-    1.47       8.7 +/-    1.47  0.040 / 0.060