PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-16:42:50
G02     315.6          80.9               11.3 +/-    0.53      11.5 +/-    0.53  0.110 / 0.110
G05     170.0          26.7               14.6 +/-    1.47      27.4 +/-    1.47  0.170 / 0.120
G06     40.8           44.6               10.0 +/-    1.03      13.5 +/-    1.03  0.020 / 0.040
G12     315.9          67.3               10.9 +/-    0.82      11.7 +/-    0.82  0.020 / 0.030
G17     84.6           11.2               11.1 +/-    1.96      30.0 +/-    1.96  0.080 / 0.110
G19     73.1           27.8                9.9 +/-    2.20      18.2 +/-    2.20  0.070 / 0.120
G24     233.0          25.8               13.4 +/-    2.08      25.7 +/-    2.08  0.130 / 0.190
G25     317.5          28.7                9.6 +/-    1.23      17.3 +/-    1.23  0.120 / 0.150