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          8.8799 +/-  1.1670   18.2333 +/-  1.1670  0.080 / 0.110
G05     45.2103        44.9224          7.6981 +/-  0.8209   10.3848 +/-  0.8209  0.060 / 0.130
G12     179.7541       11.1311         13.5967 +/-  2.9137   37.0152 +/-  2.9137  0.130 / 0.280
G13     111.6766       28.5506         10.7000 +/-  1.8314   19.3212 +/-  1.8314  0.110 / 0.340
G15     154.7619       27.4949         11.9151 +/-  1.3454   22.0138 +/-  1.3454  0.160 / 0.140
G18     225.4808       17.0573         14.0092 +/- 13.3165   33.1350 +/- 13.3165  0.120 / 0.150
G20     240.9153       84.0334          9.5043 +/-  0.6796    9.5507 +/-  0.6796  0.020 / 0.020
G21     287.5848       29.4210          9.9702 +/-  1.3298   17.6730 +/-  1.3298  0.020 / 0.020
G25     210.9273       32.5193         12.8711 +/-  2.8902   21.4185 +/-  2.8902  0.050 / 0.070
G29     346.9794       76.8817         11.5497 +/-  0.5030   11.8267 +/-  0.5030  0.040 / 0.050