PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-19:58:00
G02     232.4803       69.0655          9.6273 +/-  1.1092   10.2321 +/-  1.1092  0.110 / 0.290
G05     174.7413       12.3405         17.4768 +/-  2.8426   46.3001 +/-  2.8426  0.140 / 0.400
G06     41.7579        60.0549          9.8594 +/-  0.3664   11.1915 +/-  0.3664  0.060 / 0.100
G12     322.1017       51.5865          9.0918 +/-  1.0583   11.2501 +/-  1.0583  0.070 / 0.100
G17     70.8793        21.3085          8.6415 +/-  1.1139   18.4198 +/-  1.1139  0.070 / 0.280
G19     56.9936        38.2039          9.4128 +/-  0.7659   14.1083 +/-  0.7659  0.110 / 0.240
G24     249.7452       36.4191         11.3394 +/-  0.7359   17.5357 +/-  0.7359  0.040 / 0.050
G25     316.5810       14.4043          9.4749 +/-  2.8363   23.9092 +/-  2.8363  0.040 / 0.050