PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-22:57:50
G02     56.2742        37.0307          9.0605 +/-  0.6359   13.8600 +/-  0.6359  0.040 / 0.060
G05     63.4069        65.0255          9.9638 +/-  0.8110   10.8726 +/-  0.8110  0.040 / 0.080
G12     184.2407       32.4694         13.0147 +/-  1.3287   21.6789 +/-  1.3287  0.200 / 0.580
G13     130.5885       14.2690         13.9668 +/-  5.3467   35.3587 +/-  5.3467  0.160 / 0.650
G20     205.7541       60.3357         13.6869 +/-  0.5555   15.4983 +/-  0.5555  0.050 / 0.040
G21     269.7297       16.2820         12.6081 +/-  3.2777   30.3947 +/-  3.2777  0.040 / 0.040
G25     231.3140       51.8437         12.3405 +/-  1.7075   15.2244 +/-  1.7075  0.050 / 0.090
G29     328.3247       54.7047         10.4830 +/-  0.6435   12.5294 +/-  0.6435  0.050 / 0.090