PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-16:57:50
G02     284.8          80.8               13.0 +/-    0.56      13.2 +/-    0.56  0.030 / 0.040
G05     171.8          22.4               15.7 +/-    1.79      32.6 +/-    1.79  0.030 / 0.040
G06     40.2           48.5               11.8 +/-    0.44      15.2 +/-    0.44  0.070 / 0.150
G12     319.1          63.0               12.4 +/-    1.17      13.7 +/-    1.17  0.070 / 0.140
G17     81.2           13.7               12.1 +/-    1.58      31.1 +/-    1.58  0.150 / 0.190
G19     69.2           30.4               12.3 +/-    0.89      21.3 +/-    0.89  0.040 / 0.040
G24     236.7          28.7               12.7 +/-    1.07      22.9 +/-    1.07  0.060 / 0.170
G25     317.8          25.0               11.1 +/-    2.15      21.7 +/-    2.15  0.080 / 0.190