PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-16:43:10
G02     236.0          72.9               16.1 +/-    0.44      16.8 +/-    0.44  0.100 / 0.360
G05     176.1          11.7                9.0 +/-   26.43      24.2 +/-   26.43  0.170 / 0.310
G06     41.2           60.3               14.0 +/-    0.55      15.8 +/-    0.55  0.080 / 0.100
G12     321.7          50.9               11.8 +/-    0.38      14.7 +/-    0.38  0.090 / 0.100
G17     71.7           20.7               12.4 +/-    0.70      26.7 +/-    0.70  0.030 / 0.040
G19     57.9           37.7               12.4 +/-    1.17      18.7 +/-    1.17  0.050 / 0.040
G24     248.6          35.8               13.5 +/-    1.78      21.0 +/-    1.78  0.080 / 0.150
G25     316.7          14.7               10.4 +/-    3.74      26.1 +/-    3.74  0.080 / 0.160