PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-02:43:10
G10     285.7783       46.8927          9.5796 +/-  1.0409   12.5745 +/-  1.0409  0.050 / 0.060
G15     48.9458        38.1114          6.7299 +/-  0.6395   10.1030 +/-  0.6395  0.040 / 0.050
G18     334.8343       66.6364          9.2800 +/-  0.5027   10.0145 +/-  0.5027  0.050 / 0.090
G20     66.5463        21.6729          4.9293 +/-  1.0575   10.4152 +/-  1.0575  0.070 / 0.100
G21     63.6475        77.2692         10.4194 +/-  0.4907   10.6545 +/-  0.4907  0.120 / 0.270
G24     106.9317       22.9409         10.5980 +/-  1.1832   21.7258 +/-  1.1832  0.090 / 0.320
G27     306.5411       31.3915          9.6570 +/-  1.8189   16.4356 +/-  1.8189  0.090 / 0.190
G29     167.9938       13.3443         12.2482 +/-  1.9385   31.6983 +/-  1.9385  0.090 / 0.210
G32     208.1386       24.0576         12.6771 +/-  2.7856   25.3156 +/-  2.7856  0.040 / 0.040