PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-16:58:00
G02     233.6          71.8               12.2 +/-    0.84      12.8 +/-    0.84  0.110 / 0.370
G05     176.6          10.7                0.6 +/-   34.05       1.8 +/-   34.05  0.120 / 0.300
G06     41.6           61.2               11.5 +/-    0.63      12.9 +/-    0.63  0.070 / 0.100
G12     321.7          49.9               10.8 +/-    0.88      13.6 +/-    0.88  0.060 / 0.090
G17     70.8           21.3               10.7 +/-    1.19      22.9 +/-    1.19  0.030 / 0.050
G19     56.8           38.3               11.8 +/-    0.49      17.7 +/-    0.49  0.030 / 0.070
G24     249.8          36.4               12.1 +/-    0.70      18.7 +/-    0.70  0.090 / 0.290
G25     316.5          13.9                9.1 +/-    3.02      23.3 +/-    3.02  0.080 / 0.270