PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-18:27:50
G10     287.9          47.9               10.5 +/-    1.81      13.7 +/-    1.81  0.050 / 0.090
G15     47.3           32.8               11.0 +/-    0.90      18.2 +/-    0.90  0.050 / 0.100
G18     346.9          66.9                9.5 +/-    0.88      10.2 +/-    0.88  0.060 / 0.170
G20     66.3           23.6               11.8 +/-    0.88      23.8 +/-    0.88  0.060 / 0.160
G21     84.5           73.9               13.3 +/-    0.85      13.7 +/-    0.85  0.050 / 0.040
G24     105.5          23.7               15.2 +/-    1.54      30.6 +/-    1.54  0.040 / 0.050
G27     305.4          32.1               10.6 +/-    2.46      17.7 +/-    2.46  0.080 / 0.170
G32     208.9          24.2               13.4 +/-    2.57      26.6 +/-    2.57  0.080 / 0.170