PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-15:57:40
G02     223.2          65.9               15.2 +/-    1.12      16.5 +/-    1.12  0.070 / 0.070
G06     46.2           68.5               14.2 +/-    0.64      15.2 +/-    0.64  0.050 / 0.060
G12     320.7          42.9               13.0 +/-    1.29      18.0 +/-    1.29  0.070 / 0.100
G17     65.3           25.5               12.7 +/-    0.98      24.6 +/-    0.98  0.050 / 0.090
G19     49.9           42.7               12.6 +/-    0.60      17.6 +/-    0.60  0.040 / 0.030
G24     258.1          39.4               14.4 +/-    1.16      21.2 +/-    1.16  0.030 / 0.040