PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-15:58:00
G02     235.3          73.1               13.6 +/-    0.27      14.2 +/-    0.27  0.100 / 0.240
G05     175.8          11.8               13.4 +/-   15.97      36.0 +/-   15.97  0.090 / 0.360
G06     41.3           61.2               12.3 +/-    0.47      13.9 +/-    0.47  0.020 / 0.040
G12     321.6          50.1               11.3 +/-    0.40      14.3 +/-    0.40  0.030 / 0.040
G17     71.3           21.0               10.9 +/-    1.30      23.5 +/-    1.30  0.160 / 0.320
G19     57.4           38.0               11.1 +/-    1.06      16.6 +/-    1.06  0.150 / 0.340
G24     249.1          36.0               13.2 +/-    1.88      20.6 +/-    1.88  0.090 / 0.150
G25     316.6          13.8                7.9 +/-    3.56      20.3 +/-    3.56  0.080 / 0.140