PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-18:12:30
G02     320.0          80.3               15.1 +/-    0.68      15.3 +/-    0.68  0.020 / 0.040
G05     169.5          28.3               20.7 +/-    1.50      37.5 +/-    1.50  0.030 / 0.040
G06     41.4           42.2               12.2 +/-    0.55      17.2 +/-    0.55  0.090 / 0.110
G12     313.6          69.9               14.3 +/-    0.79      15.1 +/-    0.79  0.060 / 0.120
G17     86.2           10.0               13.0 +/-    2.71      36.1 +/-    2.71  0.070 / 0.110
G19     74.9           26.6               13.7 +/-    1.37      25.9 +/-    1.37  0.070 / 0.110
G24     231.4          24.5               16.8 +/-    0.79      33.2 +/-    0.79  0.070 / 0.300
G25     317.2          31.4               13.6 +/-    1.70      23.1 +/-    1.70  0.070 / 0.280