PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-18:42:10
G02     50.3           41.4               10.0 +/-    0.84      14.2 +/-    0.84  0.030 / 0.030
G05     77.8           68.2               11.0 +/-    0.37      11.7 +/-    0.37  0.030 / 0.030
G12     182.3          38.4               12.8 +/-    0.43      19.2 +/-    0.43  0.190 / 0.370
G21     263.8          10.6                0.1 +/-   22.83       0.3 +/-   22.83  0.210 / 0.370
G25     250.2          57.1               10.8 +/-    1.66      12.7 +/-    1.66  0.040 / 0.050
G29     321.5          44.8                9.7 +/-    0.91      13.1 +/-    0.91  0.050 / 0.050