PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-21:42:50
G08     305.0          21.0               11.2 +/-    1.61      24.0 +/-    1.61  0.070 / 0.080
G10     338.2          60.8               11.3 +/-    0.88      12.7 +/-    0.88  0.070 / 0.100
G14     220.5          35.8               12.8 +/-    0.86      20.1 +/-    0.86  0.040 / 0.060
G18     46.0           57.2               11.4 +/-    0.51      13.3 +/-    0.51  0.040 / 0.070
G21     137.5          50.4               13.0 +/-    1.07      16.3 +/-    1.07  0.060 / 0.080
G24     70.8           30.3               11.5 +/-    0.64      20.1 +/-    0.64  0.070 / 0.090
G27     267.7          36.7               13.5 +/-    1.42      20.8 +/-    1.42  0.050 / 0.120
G32     227.2          53.1               13.2 +/-    0.90      16.1 +/-    0.90  0.060 / 0.150