PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-21:58:10
G10     238.9          14.5               20.1 +/-    1.76      50.6 +/-    1.76  0.080 / 0.320
G13     72.5           37.1               15.7 +/-    0.77      23.9 +/-    0.77  0.100 / 0.190
G15     119.3          54.4               18.9 +/-    0.41      22.6 +/-    0.41  0.150 / 0.340
G16     313.0          12.1               10.7 +/-    2.79      28.6 +/-    2.79  0.170 / 0.300
G18     249.3          44.8               19.6 +/-    2.43      26.5 +/-    2.43  0.040 / 0.060
G20     32.1           61.9               14.8 +/-    0.47      16.5 +/-    0.47  0.050 / 0.060
G21     317.2          50.3               14.9 +/-    0.67      18.7 +/-    0.67  0.140 / 0.120
G26     286.2          19.2               15.1 +/-    1.63      34.0 +/-    1.63  0.120 / 0.120
G29     156.9          64.1               17.2 +/-    0.27      18.9 +/-    0.27  0.030 / 0.040