PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-20:57:40
G01     320.5          12.7                6.6 +/-   19.91      17.4 +/-   19.91  0.290 / 0.260
G08     262.6          16.1               14.5 +/-    1.23      35.2 +/-    1.23  0.160 / 0.390
G10     68.5           57.0               11.8 +/-    1.09      13.8 +/-    1.09  0.170 / 0.350
G11     308.3          20.0               10.4 +/-    1.24      23.0 +/-    1.24  0.150 / 0.320
G14     279.9          69.0               12.2 +/-    0.55      13.0 +/-    0.55  0.060 / 0.090
G18     96.8           32.2               12.6 +/-    1.19      21.2 +/-    1.19  0.060 / 0.080
G27     227.3          12.4               14.1 +/-    2.63      37.2 +/-    2.63  0.030 / 0.020
G31     179.7          32.7               16.4 +/-    1.33      27.2 +/-    1.33  0.030 / 0.020
G32     347.2          72.2               12.6 +/-    0.53      13.2 +/-    0.53  0.050 / 0.030