PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-19:57:30
G05     48.1           20.9               14.7 +/-    0.93      31.6 +/-    0.93  0.090 / 0.260
G10     235.8          11.0                2.2 +/-   56.75       5.9 +/-   56.75  0.130 / 0.250
G13     78.6           37.5               17.8 +/-    0.62      27.0 +/-    0.62  0.060 / 0.070
G15     125.2          51.6               20.9 +/-    0.68      25.9 +/-    0.68  0.050 / 0.080
G18     244.9          41.9               21.1 +/-    1.50      29.7 +/-    1.50  0.230 / 0.400
G20     27.1           67.1               16.3 +/-    0.60      17.5 +/-    0.60  0.240 / 0.450
G21     313.5          47.9               14.9 +/-    1.30      19.3 +/-    1.30  0.070 / 0.170
G25     197.7          9.8                25.7 +/-    3.04      72.0 +/-    3.04  0.070 / 0.150
G26     292.2          19.1               14.9 +/-    1.60      33.4 +/-    1.60  0.060 / 0.120
G29     152.5          68.1               19.1 +/-    1.15      20.4 +/-    1.15  0.050 / 0.100