PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-18:27:30
G08     283.0          22.3               14.5 +/-    1.57      30.1 +/-    1.57  0.090 / 0.150
G10     28.4           62.8               10.9 +/-    0.81      12.1 +/-    0.81  0.080 / 0.140
G14     240.9          55.2               15.2 +/-    0.67      18.1 +/-    0.67  0.090 / 0.170
G18     77.2           44.1               10.5 +/-    0.41      14.4 +/-    0.41  0.080 / 0.220
G21     149.3          25.0               15.1 +/-    0.86      29.5 +/-    0.86  0.090 / 0.310
G24     48.7           21.3                7.0 +/-    0.97      15.0 +/-    0.97  0.140 / 0.250
G27     243.0          25.6               18.0 +/-    3.37      34.7 +/-    3.37  0.080 / 0.160
G31     182.6          14.1               22.0 +/-    0.98      56.0 +/-    0.98  0.070 / 0.150
G32     272.6          73.7               13.8 +/-    0.64      14.4 +/-    0.64  0.030 / 0.080