PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-17:12:20
G02     38.3           51.2                8.3 +/-    0.37      10.4 +/-    0.37  0.040 / 0.050
G05     123.4          68.7                8.6 +/-    0.63       9.2 +/-    0.63  0.040 / 0.040
G12     186.8          54.1                9.7 +/-    0.38      11.7 +/-    0.38  0.030 / 0.020
G25     275.3          59.2                6.5 +/-    1.04       7.5 +/-    1.04  0.020 / 0.030
G29     313.8          34.9                7.2 +/-    1.77      11.5 +/-    1.77  0.050 / 0.050