PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-19:42:30
G02     50.8           40.8               13.0 +/-    0.69      18.7 +/-    0.69  0.050 / 0.050
G05     92.1           71.7               15.8 +/-    0.56      16.6 +/-    0.56  0.050 / 0.050
G12     187.2          42.9               14.7 +/-    0.94      20.5 +/-    0.94  0.260 / 0.430
G20     202.8          50.1               16.8 +/-    0.55      21.2 +/-    0.55  0.230 / 0.480
G21     263.6          11.9                9.8 +/-   24.05      26.4 +/-   24.05  0.050 / 0.060
G25     246.2          57.4               15.7 +/-    0.96      18.2 +/-    0.96  0.040 / 0.060
G29     324.0          48.5               14.5 +/-    0.65      18.7 +/-    0.65  0.030 / 0.020