PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-18:27:40
G10     292.9          49.8               11.0 +/-    1.02      13.9 +/-    1.02  0.060 / 0.090
G14     209.6          10.1               -8.0 +/-   14.50     -22.1 +/-   14.50  0.050 / 0.080
G15     46.4           29.5                8.9 +/-    1.37      15.8 +/-    1.37  0.070 / 0.050
G18     355.8          66.4                9.6 +/-    0.85      10.4 +/-    0.85  0.070 / 0.050
G20     69.0           21.2                9.9 +/-    2.30      21.3 +/-    2.30  0.070 / 0.130
G21     96.4           71.8               13.0 +/-    0.57      13.6 +/-    0.57  0.060 / 0.110
G24     101.7          25.5               13.1 +/-    1.01      25.3 +/-    1.01  0.080 / 0.290
G27     301.8          33.9               11.7 +/-    1.39      18.9 +/-    1.39  0.080 / 0.260
G32     210.1          27.9               13.3 +/-    1.22      24.5 +/-    1.22  0.060 / 0.110