PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-18:27:50
G02     29.4           58.8               19.2 +/-    0.55      22.0 +/-    0.55  0.040 / 0.040
G05     153.0          57.5               21.5 +/-    0.85      25.0 +/-    0.85  0.030 / 0.090
G06     52.6           18.1               13.7 +/-    0.74      31.6 +/-    0.74  0.040 / 0.060
G12     202.9          70.1               14.6 +/-    1.37      15.4 +/-    1.37  0.040 / 0.050
G20     197.8          24.6               19.7 +/-    0.95      38.7 +/-    0.95  0.080 / 0.230
G25     296.6          55.2               15.8 +/-    1.46      18.8 +/-    1.46  0.060 / 0.250
G29     307.3          29.0               14.7 +/-    1.03      26.3 +/-    1.03  0.030 / 0.050