PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-18:57:10
G02     43.8           46.7                7.8 +/-    1.10      10.3 +/-    1.10  0.030 / 0.030
G05     102.1          69.8                9.7 +/-    0.44      10.2 +/-    0.44  0.040 / 0.030
G12     183.9          47.4               10.3 +/-    0.44      13.4 +/-    0.44  0.030 / 0.050
G25     267.2          58.9               10.0 +/-    2.72      11.4 +/-    2.72  0.040 / 0.050
G29     316.5          38.1                7.4 +/-    1.14      11.2 +/-    1.14  0.050 / 0.060