PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/29-22:57:50
G02     50.9           40.2                8.5 +/-    0.53      12.3 +/-    0.53  0.150 / 0.490
G05     78.1           67.6                9.8 +/-    0.39      10.5 +/-    0.39  0.020 / 0.030
G12     184.9          41.9               12.6 +/-    1.47      17.7 +/-    1.47  0.020 / 0.040
G21     263.1          10.2               -4.0 +/-   21.45     -11.0 +/-   21.45  0.040 / 0.070
G25     254.9          57.3               10.9 +/-    0.55      12.7 +/-    0.55  0.070 / 0.080
G29     321.0          44.1                9.8 +/-    0.82      13.4 +/-    0.82  0.060 / 0.060