PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-20:42:40
G02     45.5           45.0                9.5 +/-    1.90      12.9 +/-    1.90  0.030 / 0.030
G05     96.4           69.5               10.8 +/-    0.78      11.5 +/-    0.78  0.030 / 0.030
G12     184.8          46.9               11.3 +/-    0.78      14.8 +/-    0.78  0.030 / 0.050
G25     265.4          58.6                8.1 +/-    1.69       9.3 +/-    1.69  0.040 / 0.050
G29     317.4          39.2                9.2 +/-    0.96      13.6 +/-    0.96  0.030 / 0.060