PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-22:28:10
G10     295.1          50.6               14.2 +/-    2.30      17.8 +/-    2.30  0.100 / 0.080
G14     209.8          12.4               11.6 +/-   36.22      30.6 +/-   36.22  0.110 / 0.060
G15     46.3           29.4               12.2 +/-    1.51      21.7 +/-    1.51  0.070 / 0.120
G18     356.1          66.2               13.8 +/-    0.35      14.9 +/-    0.35  0.070 / 0.110
G20     70.8           18.4               11.7 +/-    1.46      26.8 +/-    1.46  0.040 / 0.030
G21     96.2           73.3               15.3 +/-    0.41      15.9 +/-    0.41  0.040 / 0.040
G24     100.1          26.1               14.9 +/-    1.59      28.3 +/-    1.59  0.090 / 0.230
G27     299.8          34.8               14.4 +/-    1.73      23.0 +/-    1.73  0.080 / 0.210
G32     211.1          28.2               19.0 +/-    1.45      34.6 +/-    1.45  0.060 / 0.060