PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-07:58:00
G01     258.0929       38.2205          4.6746 +/-  0.8339    7.0045 +/-  0.8339  0.150 / 0.260
G03     316.3625       35.5977          2.9089 +/-  1.6958    4.5659 +/-  1.6958  0.210 / 0.310
G10     134.6382       10.4684          3.2858 +/-  2.3162    9.0748 +/-  2.3162  0.040 / 0.040
G11     239.3983       16.3850          3.2839 +/-  1.6357    7.8966 +/-  1.6357  0.030 / 0.050
G14     55.2648        43.0633          3.0002 +/-  0.5058    4.1590 +/-  0.5058  0.110 / 0.320
G22     310.5192       61.8931          5.0687 +/-  0.7553    5.6650 +/-  0.7553  0.130 / 0.420
G25     41.3111        10.7181          2.1174 +/-  1.4506    5.8166 +/-  1.4506  0.050 / 0.090
G26     142.4334       32.2587          6.2360 +/-  0.9917   10.4308 +/-  0.9917  0.060 / 0.110
G31     43.1181        64.6701          2.5708 +/-  0.4451    2.8125 +/-  0.4451  0.050 / 0.100
G32     71.8235        27.1685          2.3317 +/-  0.8381    4.3389 +/-  0.8381  0.050 / 0.090