PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-21:27:20
G02     44.3           45.9                9.0 +/-    0.48      12.0 +/-    0.48  0.030 / 0.030
G05     101.6          69.4                9.1 +/-    0.39       9.7 +/-    0.39  0.030 / 0.030
G12     185.7          49.4               10.1 +/-    2.23      12.9 +/-    2.23  0.040 / 0.060
G25     269.7          58.6               11.0 +/-    0.49      12.6 +/-    0.49  0.040 / 0.070
G29     316.3          37.8                8.9 +/-    1.10      13.5 +/-    1.10  0.030 / 0.070