PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-06:27:50
G01     306.8730       33.2757          4.4265 +/-  1.1079    7.2581 +/-  1.1079  0.040 / 0.020
G10     105.4539       41.2777          4.8703 +/-  0.3886    6.9398 +/-  0.3886  0.040 / 0.030
G11     279.1674       29.9238          5.2804 +/-  1.3963    9.2618 +/-  1.3963  0.090 / 0.230
G14     0.9093         66.2698          4.0847 +/-  0.8247    4.4189 +/-  0.8247  0.100 / 0.280
G18     116.5461       16.4008          3.2688 +/-  1.9811    7.8573 +/-  1.9811  0.060 / 0.040
G22     309.7204       26.9838          1.7740 +/-  2.3306    3.3146 +/-  2.3306  0.060 / 0.050
G25     77.9951        15.8626          3.0415 +/-  1.0673    7.4079 +/-  1.0673  0.070 / 0.150
G31     166.3623       65.0798          6.6945 +/-  1.8642    7.3022 +/-  1.8642  0.050 / 0.130
G32     35.2255        53.0363          3.7893 +/-  0.6245    4.6118 +/-  0.6245  0.030 / 0.030