PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-21:13:10
G02     42.1           47.9                8.7 +/-    0.41      11.3 +/-    0.41  0.030 / 0.030
G05     110.1          69.0                9.4 +/-    1.14      10.0 +/-    1.14  0.030 / 0.040
G12     186.3          52.3                9.7 +/-    1.40      11.9 +/-    1.40  0.040 / 0.050
G25     275.2          58.4               10.0 +/-    0.74      11.5 +/-    0.74  0.060 / 0.050
G29     314.5          35.7                9.1 +/-    2.12      14.2 +/-    2.12  0.050 / 0.060