PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-16:57:30
G02     32.4           56.4               16.8 +/-    1.21      19.8 +/-    1.21  0.050 / 0.040
G05     148.3          60.0               20.7 +/-    0.46      23.5 +/-    0.46  0.050 / 0.040
G06     53.3           17.5               14.1 +/-    2.58      33.0 +/-    2.58  0.020 / 0.030
G12     201.6          68.6               17.6 +/-    0.62      18.8 +/-    0.62  0.030 / 0.030
G20     198.3          25.9               21.5 +/-    3.37      41.1 +/-    3.37  0.170 / 0.210
G25     294.8          55.4               12.8 +/-    5.16      15.2 +/-    5.16  0.140 / 0.180
G29     309.1          31.4               12.9 +/-    2.03      22.0 +/-    2.03  0.040 / 0.030