PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-22:43:10
G02     51.0235        41.2874          9.9989 +/-  0.9527   14.2455 +/-  0.9527  0.030 / 0.050
G05     78.0122        68.9917          9.6158 +/-  0.3906   10.2243 +/-  0.3906  0.040 / 0.060
G12     185.4260       39.1505         12.9732 +/-  2.0435   19.1359 +/-  2.0435  0.200 / 0.650
G20     203.0779       53.4210         13.0708 +/-  0.6870   15.8403 +/-  0.6870  0.190 / 0.600
G21     264.9077       12.4658         12.8829 +/-  1.5866   34.0315 +/-  1.5866  0.030 / 0.040
G25     241.0669       56.1393         12.6244 +/-  0.4252   14.8671 +/-  0.4252  0.030 / 0.040
G29     324.2329       48.9458         10.5945 +/-  0.8387   13.5382 +/-  0.8387  0.040 / 0.070