PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-18:27:30
G10     292.9          49.8               10.8 +/-    2.95      13.7 +/-    2.95  0.060 / 0.090
G15     46.4           29.5                9.4 +/-    0.94      16.6 +/-    0.94  0.060 / 0.080
G18     355.8          66.4               10.6 +/-    0.40      11.5 +/-    0.40  0.030 / 0.030
G20     69.0           21.2                9.2 +/-    1.09      19.7 +/-    1.09  0.030 / 0.040
G21     96.4           71.8               13.0 +/-    0.47      13.6 +/-    0.47  0.070 / 0.120
G24     101.7          25.5               12.9 +/-    0.96      25.0 +/-    0.96  0.070 / 0.100
G27     301.8          33.9               10.2 +/-    2.07      16.6 +/-    2.07  0.080 / 0.170
G32     210.1          27.9               13.9 +/-    2.08      25.4 +/-    2.08  0.080 / 0.200