PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-14:57:50
G02     229.6          70.9               15.6 +/-    1.07      16.4 +/-    1.07  0.050 / 0.100
G06     42.7           64.9               14.4 +/-    0.86      15.8 +/-    0.86  0.050 / 0.100
G12     321.2          46.7               12.2 +/-    2.08      16.1 +/-    2.08  0.130 / 0.350
G17     68.7           23.0               12.7 +/-    0.79      25.9 +/-    0.79  0.150 / 0.380
G19     54.2           40.0               15.1 +/-    0.96      21.9 +/-    0.96  0.040 / 0.070
G24     252.7          37.5               15.2 +/-    1.36      23.0 +/-    1.36  0.040 / 0.060
G25     315.9          10.7              -11.5 +/-   33.36     -31.4 +/-   33.36  0.070 / 0.100