PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-17:27:40
G08     311.5          17.9                7.0 +/-    1.44      16.2 +/-    1.44  0.060 / 0.080
G10     326.7          59.0                6.9 +/-    1.57       7.9 +/-    1.57  0.050 / 0.090
G14     217.2          29.0                9.3 +/-    1.97      16.6 +/-    1.97  0.030 / 0.060
G15     46.4           11.2                7.5 +/-    1.53      20.4 +/-    1.53  0.030 / 0.060
G18     38.2           59.2                5.9 +/-    0.48       6.8 +/-    0.48  0.080 / 0.110
G21     132.2          53.0                8.9 +/-    1.30      10.8 +/-    1.30  0.090 / 0.130
G24     77.7           30.6                7.1 +/-    0.65      12.3 +/-    0.65  0.030 / 0.050
G27     276.0          37.9                8.2 +/-    0.94      12.3 +/-    0.94  0.030 / 0.050
G32     221.7          49.3                7.2 +/-    1.73       9.2 +/-    1.73  0.030 / 0.040