PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-18:43:00
G08     272.3          19.7                5.6 +/-    1.65      12.5 +/-    1.65  0.110 / 0.220
G10     51.0           60.6                8.1 +/-    0.69       9.1 +/-    0.69  0.160 / 0.320
G11     314.9          13.5                5.9 +/-    2.35      15.2 +/-    2.35  0.170 / 0.330
G14     257.4          63.2                7.9 +/-    0.58       8.7 +/-    0.58  0.140 / 0.480
G18     88.3           37.7                8.9 +/-    0.79      13.5 +/-    0.79  0.070 / 0.210
G21     152.2          15.0                9.0 +/-    1.07      22.4 +/-    1.07  0.060 / 0.170
G24     42.3           14.4                6.5 +/-    2.29      16.5 +/-    2.29  0.130 / 0.200
G27     234.2          18.7                8.8 +/-    1.41      20.0 +/-    1.41  0.100 / 0.190
G31     180.4          24.3               10.5 +/-    1.06      20.8 +/-    1.06  0.040 / 0.030
G32     316.8          75.6                9.2 +/-    0.60       9.5 +/-    0.60  0.030 / 0.030