PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-04:28:00
G08     289.4245       23.5503          6.8364 +/-  1.1965   13.8148 +/-  1.1965  0.040 / 0.030
G10     9.4247         63.2380          5.7981 +/-  0.5470    6.4115 +/-  0.5470  0.040 / 0.030
G14     232.3937       50.0913          7.9870 +/-  0.8814   10.0615 +/-  0.8814  0.100 / 0.120
G18     63.8857        51.6999          5.3394 +/-  1.0628    6.5982 +/-  1.0628  0.100 / 0.100
G21     147.0370       38.5460          7.5683 +/-  0.9841   11.2777 +/-  0.9841  0.120 / 0.150
G24     55.4174        25.7526          5.3219 +/-  0.7484   10.2217 +/-  0.7484  0.120 / 0.160
G27     250.4551       30.2772          7.6430 +/-  1.7723   13.3077 +/-  1.7723  0.070 / 0.130
G32     250.2754       68.7924          7.7187 +/-  0.7740    8.2169 +/-  0.7740  0.050 / 0.110