PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-21:58:00
G02     34.2964        54.8327         11.7101 +/-  0.7633   13.9772 +/-  0.7633  0.040 / 0.050
G05     135.3498       65.6176         12.2700 +/-  0.7089   13.3333 +/-  0.7089  0.040 / 0.050
G06     57.3597        11.2618         10.2100 +/-  1.2959   27.7154 +/-  1.2959  0.020 / 0.040
G12     191.6183       60.1644         12.6317 +/-  1.0340   14.3248 +/-  1.0340  0.020 / 0.040
G20     198.3158       33.4075         13.5277 +/-  1.9372   22.1250 +/-  1.9372  0.070 / 0.100
G25     280.9629       59.5349         12.4763 +/-  0.6737   14.2271 +/-  0.6737  0.060 / 0.080
G29     311.8271       33.3440         10.0542 +/-  1.4879   16.4641 +/-  1.4879  0.030 / 0.050