PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-08:28:00
G01     241.1898       29.8057          5.4556 +/-  1.5644    9.5928 +/-  1.5644  0.060 / 0.190
G03     313.0929       50.0574          3.4359 +/-  1.5377    4.3302 +/-  1.5377  0.090 / 0.170
G14     70.6284        33.8242          2.3068 +/-  1.1508    3.7428 +/-  1.1508  0.060 / 0.160
G16     159.2878       26.6099          4.4050 +/-  2.2836    8.2994 +/-  2.2836  0.060 / 0.140
G22     283.4982       74.5309          3.7930 +/-  0.5492    3.9203 +/-  0.5492  0.040 / 0.060
G23     292.8264       23.9001          3.4492 +/-  1.5918    6.9133 +/-  1.5918  0.060 / 0.050
G26     128.1647       44.7846          5.7250 +/-  0.9498    7.7384 +/-  0.9498  0.060 / 0.140
G31     40.2231        49.2022          2.0625 +/-  0.8452    2.6271 +/-  0.8452  0.060 / 0.160
G32     84.6585        17.8127          2.8259 +/-  0.9024    6.5609 +/-  0.9024  0.030 / 0.040