PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-18:12:50
G08     269.5          18.6                9.4 +/-    2.23      21.5 +/-    2.23  0.340 / 0.150
G10     57.2           59.5               10.9 +/-    0.70      12.4 +/-    0.70  0.240 / 0.220
G11     313.2          15.3                7.7 +/-    2.04      19.0 +/-    2.04  0.090 / 0.100
G14     263.4          65.1               12.4 +/-    0.76      13.5 +/-    0.76  0.060 / 0.110
G18     91.4           35.6               10.3 +/-    1.35      16.1 +/-    1.35  0.180 / 0.160
G21     152.9          12.5               10.0 +/-    1.15      26.3 +/-    1.15  0.190 / 0.230
G24     40.8           12.2                8.0 +/-    2.17      21.3 +/-    2.17  0.040 / 0.050
G27     231.9          16.6                9.7 +/-    2.33      23.1 +/-    2.33  0.030 / 0.040
G31     179.5          27.7               11.0 +/-    1.32      20.2 +/-    1.32  0.020 / 0.020
G32     330.6          74.8               12.4 +/-    0.28      12.8 +/-    0.28  0.020 / 0.020