PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/26-19:13:00
G02     32.5           56.3               15.5 +/-    0.50      18.2 +/-    0.50  0.030 / 0.040
G05     148.3          61.1               18.4 +/-    0.60      20.7 +/-    0.60  0.030 / 0.050
G06     54.7           15.1               11.9 +/-    2.26      29.4 +/-    2.26  0.040 / 0.070
G12     197.5          66.0               15.8 +/-    1.21      17.1 +/-    1.21  0.050 / 0.060
G20     198.1          28.5               21.8 +/-    1.33      39.5 +/-    1.33  0.040 / 0.040
G25     289.9          57.6               15.6 +/-    1.33      18.1 +/-    1.33  0.040 / 0.040
G29     309.6          31.4               13.1 +/-    1.10      22.2 +/-    1.10  0.080 / 0.110