PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-20:27:20
G02     39.8           49.9                9.9 +/-    0.94      12.5 +/-    0.94  0.030 / 0.030
G05     117.7          68.3               10.9 +/-    0.77      11.7 +/-    0.77  0.030 / 0.030
G12     186.5          54.5               10.3 +/-    0.56      12.4 +/-    0.56  0.040 / 0.040
G25     279.7          58.1               15.4 +/-    2.06      17.8 +/-    2.06  0.040 / 0.040
G29     313.0          33.8                8.0 +/-    1.56      13.0 +/-    1.56  0.030 / 0.050