PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-20:42:40
G02     44.0           46.3                8.8 +/-    0.88      11.7 +/-    0.88  0.030 / 0.030
G05     102.4          69.5               10.0 +/-    0.61      10.6 +/-    0.61  0.030 / 0.030
G12     185.2          49.0               12.5 +/-    1.06      15.9 +/-    1.06  0.050 / 0.050
G25     269.4          58.7               12.1 +/-    3.84      13.8 +/-    3.84  0.040 / 0.060
G29     316.2          37.7                9.5 +/-    1.17      14.4 +/-    1.17  0.050 / 0.050