PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-19:12:30
G02     36.0           53.4               12.5 +/-    0.48      15.2 +/-    0.48  0.040 / 0.060
G05     142.8          64.4               17.4 +/-    0.66      19.0 +/-    0.66  0.040 / 0.060
G06     56.7           12.5                8.5 +/-    1.83      22.6 +/-    1.83  0.030 / 0.040
G12     194.3          62.0               12.7 +/-    0.83      14.2 +/-    0.83  0.040 / 0.050
G20     198.6          32.1               16.7 +/-    1.26      28.0 +/-    1.26  0.030 / 0.040
G25     283.0          59.0               13.3 +/-    0.68      15.2 +/-    0.68  0.030 / 0.030
G29     312.2          34.3                9.9 +/-    1.35      15.9 +/-    1.35  0.060 / 0.110