PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-16:57:40
G10     293.0          49.9                9.6 +/-    0.66      12.1 +/-    0.66  0.050 / 0.070
G15     46.3           29.2                7.4 +/-    1.02      13.2 +/-    1.02  0.050 / 0.090
G18     356.9          66.3                9.0 +/-    0.70       9.7 +/-    0.70  0.030 / 0.040
G20     68.6           22.0                7.4 +/-    0.84      15.5 +/-    0.84  0.030 / 0.050
G21     98.5           70.7               10.9 +/-    0.61      11.5 +/-    0.61  0.060 / 0.140
G24     101.6          25.5               12.0 +/-    0.83      23.2 +/-    0.83  0.080 / 0.140
G27     301.9          33.9                9.9 +/-    1.55      16.0 +/-    1.55  0.060 / 0.230
G32     210.0          28.5               12.8 +/-    0.95      23.2 +/-    0.95  0.060 / 0.260