PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-20:12:30
G02     247.6717       74.8374          9.8542 +/-  0.5418   10.1718 +/-  0.5418  0.100 / 0.320
G05     172.2363       18.2200         15.5962 +/-  1.9253   35.8479 +/-  1.9253  0.170 / 0.290
G06     40.4013        53.2346          9.8696 +/-  0.6244   11.9855 +/-  0.6244  0.070 / 0.130
G12     321.6256       58.5687          9.9561 +/-  0.9452   11.4532 +/-  0.9452  0.090 / 0.130
G17     76.3605        17.2718          9.1097 +/-  1.7249   21.4331 +/-  1.7249  0.100 / 0.170
G19     63.5722        33.9721          8.8945 +/-  1.1029   14.3907 +/-  1.1029  0.080 / 0.190
G24     242.4550       32.6190         11.4809 +/-  1.1076   19.0677 +/-  1.1076  0.030 / 0.040
G25     317.5349       20.3287         10.0331 +/-  1.5278   21.8999 +/-  1.5278  0.030 / 0.040