PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-21:12:40
G02     41.7           48.2                9.2 +/-    0.80      11.9 +/-    0.80  0.030 / 0.020
G05     111.5          68.9               10.0 +/-    0.51      10.6 +/-    0.51  0.020 / 0.030
G12     186.5          52.8               11.1 +/-    0.65      13.5 +/-    0.65  0.040 / 0.050
G25     276.2          58.4               16.1 +/-    2.77      18.6 +/-    2.77  0.040 / 0.040
G29     314.2          35.3                9.0 +/-    1.07      14.2 +/-    1.07  0.050 / 0.050