PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-23:57:50
G02     79.6089        18.7193          9.9578 +/-  0.7147   22.6086 +/-  0.7147  0.070 / 0.170
G05     44.5465        38.5139          8.4373 +/-  0.5373   12.5794 +/-  0.5373  0.060 / 0.150
G13     104.4913       32.1561         12.6670 +/-  0.8825   21.2308 +/-  0.8825  0.030 / 0.060
G15     150.4332       33.4674         13.9611 +/-  0.5928   22.8075 +/-  0.5928  0.030 / 0.060
G18     229.0379       22.8119         14.8374 +/-  1.9913   30.5096 +/-  1.9913  0.020 / 0.030
G20     334.3618       85.7512          9.2690 +/-  0.5932    9.2919 +/-  0.5932  0.020 / 0.030
G21     293.2746       33.4470          9.3629 +/-  1.0161   15.3016 +/-  1.0161  0.100 / 0.290
G25     206.9541       26.4093         12.0582 +/-  2.2457   22.8205 +/-  2.2457  0.110 / 0.270
G26     309.6913       16.5895          8.9928 +/-  1.9932   21.5160 +/-  1.9932  0.060 / 0.150
G29     5.2374         83.8662         10.9796 +/-  0.6064   11.0363 +/-  0.6064  0.080 / 0.130