PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-20:58:20
G05     49.8           17.2               13.1 +/-    1.22      30.8 +/-    1.22  0.130 / 0.200
G10     239.3          15.0               18.8 +/-    1.05      46.8 +/-    1.05  0.150 / 0.220
G13     71.7           37.0               13.8 +/-    1.08      21.2 +/-    1.08  0.110 / 0.260
G15     117.2          54.7               13.1 +/-    0.37      15.7 +/-    0.37  0.120 / 0.200
G16     313.0          11.9               11.7 +/-    6.18      31.2 +/-    6.18  0.130 / 0.150
G18     250.2          45.7               15.4 +/-    2.39      20.5 +/-    2.39  0.060 / 0.160
G20     32.2           61.7               14.9 +/-    0.53      16.7 +/-    0.53  0.030 / 0.030
G21     318.3          51.1               15.3 +/-    0.94      19.1 +/-    0.94  0.030 / 0.030
G26     286.3          18.9               14.9 +/-    1.15      33.6 +/-    1.15  0.040 / 0.040
G29     156.7          62.7               15.9 +/-    0.31      17.7 +/-    0.31  0.050 / 0.040