PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-23:42:50
G02     74.2467        22.8721          9.2023 +/-  0.6649   18.8953 +/-  0.6649  0.090 / 0.120
G05     45.2103        44.9224          9.0269 +/-  0.7051   12.1774 +/-  0.7051  0.110 / 0.130
G12     179.7541       11.1311         16.1562 +/-  3.6108   43.9831 +/-  3.6108  0.030 / 0.060
G13     111.6766       28.5506         13.7624 +/-  1.9301   24.8511 +/-  1.9301  0.030 / 0.060
G15     154.7619       27.4949         13.9320 +/-  1.8252   25.7402 +/-  1.8252  0.030 / 0.030
G18     225.4808       17.0573         13.4793 +/-  1.5585   31.8816 +/-  1.5585  0.020 / 0.030
G20     240.9153       84.0334         10.7346 +/-  0.6928   10.7871 +/-  0.6928  0.160 / 0.270
G21     287.5848       29.4210         10.9859 +/-  2.2501   19.4734 +/-  2.2501  0.140 / 0.310
G25     210.9273       32.5193         15.2560 +/-  1.1272   25.3873 +/-  1.1272  0.080 / 0.170
G29     346.9794       76.8817         12.1925 +/-  0.6578   12.4849 +/-  0.6578  0.070 / 0.210