PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-02:27:50
G10     276.8603       42.7804          9.3626 +/-  0.9686   13.0345 +/-  0.9686  0.230 / 0.220
G13     39.0269        12.4340          5.9025 +/-  2.6716   15.6035 +/-  2.6716  0.150 / 0.200
G15     53.0324        44.3490          6.9792 +/-  0.8597    9.4930 +/-  0.8597  0.140 / 0.150
G18     317.5440       65.8462          8.8244 +/-  0.3455    9.5740 +/-  0.3455  0.110 / 0.170
G20     61.5292        26.6469          5.8245 +/-  1.2637   10.9647 +/-  1.2637  0.060 / 0.060
G21     30.7295        76.4395          7.8632 +/-  1.3277    8.0649 +/-  1.3277  0.060 / 0.060
G24     113.6836       19.0871          9.4516 +/-  1.2755   21.2665 +/-  1.2755  0.130 / 0.200
G27     312.3714       26.8900          8.7095 +/-  1.3483   16.3073 +/-  1.3483  0.110 / 0.180
G29     168.0577       20.3020         10.5614 +/-  2.3840   23.0681 +/-  2.3840  0.130 / 0.150
G32     206.2217       17.1929         14.0392 +/-  2.7040   33.0955 +/-  2.7040  0.100 / 0.110