PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-21:57:00
G02     40.1           49.5                9.6 +/-    0.82      12.2 +/-    0.82  0.020 / 0.030
G05     117.5          68.0               11.9 +/-    0.45      12.7 +/-    0.45  0.030 / 0.040
G12     187.9          55.8               12.2 +/-    2.12      14.5 +/-    2.12  0.040 / 0.060
G25     281.2          57.7               11.7 +/-    0.66      13.6 +/-    0.66  0.050 / 0.060
G29     312.8          33.6                9.4 +/-    1.09      15.3 +/-    1.09  0.060 / 0.070