PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-17:43:10
G02     248.6          76.4               15.1 +/-    0.53      15.5 +/-    0.53  0.050 / 0.050
G05     174.1          16.1               20.8 +/-    0.63      50.3 +/-    0.63  0.040 / 0.060
G06     40.2           54.9               13.9 +/-    0.71      16.6 +/-    0.71  0.110 / 0.260
G12     321.5          56.3               13.7 +/-    1.56      16.1 +/-    1.56  0.100 / 0.280
G17     75.7           17.7               12.6 +/-    0.79      29.4 +/-    0.79  0.080 / 0.200
G19     62.7           34.6               13.5 +/-    0.96      21.6 +/-    0.96  0.080 / 0.250
G24     243.3          33.0               16.3 +/-    1.32      26.9 +/-    1.32  0.080 / 0.160
G25     317.4          19.5               11.9 +/-    1.29      26.5 +/-    1.29  0.110 / 0.160