PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-18:58:10
G01     319.8          15.6                7.5 +/-    2.33      18.5 +/-    2.33  0.040 / 0.050
G08     260.2          14.5                8.7 +/-    1.55      22.0 +/-    1.55  0.050 / 0.060
G10     74.7           55.3                8.5 +/-    0.44      10.0 +/-    0.44  0.030 / 0.030
G11     306.2          21.2                8.5 +/-    2.42      18.1 +/-    2.42  0.030 / 0.030
G14     288.5          69.8                8.4 +/-    0.48       8.9 +/-    0.48  0.020 / 0.050
G18     100.2          29.3                9.2 +/-    1.19      16.3 +/-    1.19  0.020 / 0.030
G31     177.9          37.8               11.3 +/-    1.54      17.0 +/-    1.54  0.110 / 0.300
G32     359.6          69.7                8.0 +/-    0.32       8.5 +/-    0.32  0.140 / 0.350