PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-17:43:00
G02     233.3          71.1               13.0 +/-    0.40      13.7 +/-    0.40  0.060 / 0.090
G05     176.1          11.1                6.5 +/-   31.54      17.6 +/-   31.54  0.090 / 0.080
G06     41.6           60.9               11.7 +/-    0.72      13.1 +/-    0.72  0.040 / 0.050
G12     321.7          50.3               12.2 +/-    0.66      15.4 +/-    0.66  0.040 / 0.040
G17     70.9           21.3               10.1 +/-    1.19      21.5 +/-    1.19  0.090 / 0.280
G19     56.9           38.3               11.4 +/-    1.25      17.0 +/-    1.25  0.130 / 0.290
G24     249.8          36.4               13.3 +/-    2.06      20.6 +/-    2.06  0.070 / 0.110
G25     316.6          14.4               10.7 +/-    2.51      27.1 +/-    2.51  0.080 / 0.120