PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-13:58:00
G10     244.7          20.8                4.6 +/-    4.32       9.9 +/-    4.32  0.090 / 0.180
G13     61.9           34.3                5.2 +/-    0.80       8.4 +/-    0.80  0.090 / 0.200
G15     98.6           56.9                6.9 +/-    0.42       8.1 +/-    0.42  0.040 / 0.030
G16     306.1          13.6                4.0 +/-    1.39      10.4 +/-    1.39  0.040 / 0.030
G18     260.7          53.3                6.2 +/-    2.51       7.5 +/-    2.51  0.080 / 0.300
G20     34.1           58.3                5.6 +/-    0.76       6.5 +/-    0.76  0.080 / 0.260
G21     330.9          58.6                3.2 +/-    0.73       3.6 +/-    0.73  0.060 / 0.090
G26     276.7          17.8                5.5 +/-    1.27      12.8 +/-    1.27  0.050 / 0.100
G29     160.5          54.6                7.4 +/-    0.74       8.8 +/-    0.74  0.030 / 0.030