PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-17:13:10
G01     44.5101        20.2423          8.1679 +/-  1.3688   17.8661 +/-  1.3688  0.080 / 0.250
G06     175.8331       33.2972         12.6840 +/-  1.5021   20.7892 +/-  1.5021  0.100 / 0.210
G13     244.8497       25.9417         12.9286 +/-  1.7428   24.7260 +/-  1.7428  0.070 / 0.080
G15     280.3821       13.7759         10.2955 +/-  1.1739   26.3736 +/-  1.1739  0.060 / 0.080
G17     355.6793       73.5778         11.3186 +/-  0.7550   11.7483 +/-  0.7550  0.020 / 0.040
G19     265.0798       67.7622         10.8914 +/-  0.8649   11.6680 +/-  0.8649  0.040 / 0.040
G24     318.7078       12.8215         10.0838 +/-  1.7369   26.4187 +/-  1.7369  0.100 / 0.210
G28     63.6726        49.6033         10.9652 +/-  0.5840   13.8966 +/-  0.5840  0.090 / 0.170
G30     153.0625       36.0039         12.4226 +/-  1.3409   19.3550 +/-  1.3409  0.230 / 0.390