PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-16:42:40
G08     320.6          10.9               -8.9 +/-   30.71     -24.4 +/-   30.71  0.060 / 0.080
G10     304.8          53.8                6.2 +/-    0.82       7.5 +/-    0.82  0.050 / 0.070
G14     211.9          16.8                8.6 +/-    3.68      20.4 +/-    3.68  0.030 / 0.050
G15     45.4           22.1                4.2 +/-    0.53       8.7 +/-    0.53  0.030 / 0.040
G18     14.7           64.2                5.6 +/-    0.74       6.2 +/-    0.74  0.090 / 0.110
G20     74.3           17.0                5.6 +/-    0.97      13.3 +/-    0.97  0.090 / 0.120
G21     115.5          65.1                7.7 +/-    0.65       8.4 +/-    0.65  0.110 / 0.320
G24     92.9           28.4                7.3 +/-    1.14      13.2 +/-    1.14  0.120 / 0.370
G27     292.8          36.8                7.0 +/-    1.02      10.8 +/-    1.02  0.080 / 0.220
G32     213.4          36.6                8.6 +/-    2.06      13.3 +/-    2.06  0.060 / 0.260