PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-23:12:40
G02     63.3552        31.3630          7.9152 +/-  1.2561   13.4789 +/-  1.2561  0.060 / 0.080
G05     51.9879        57.7679          8.9462 +/-  0.5416   10.3690 +/-  0.5416  0.080 / 0.100
G12     182.6854       23.7825         12.5258 +/-  1.2851   25.1744 +/-  1.2851  0.080 / 0.150
G13     123.9064       20.0181         13.4426 +/-  1.8366   29.5649 +/-  1.8366  0.090 / 0.120
G15     162.2230       16.1012         13.2069 +/-  2.2833   31.9795 +/-  2.2833  0.090 / 0.110
G20     211.1924       69.8025         10.6649 +/-  0.3892   11.2865 +/-  0.3892  0.090 / 0.090
G21     276.5218       21.4253         11.3790 +/-  1.6746   24.1867 +/-  1.6746  0.040 / 0.030
G25     221.3670       44.7373         11.1312 +/-  2.3868   15.0559 +/-  2.3868  0.030 / 0.020
G29     334.1926       63.0192          9.8446 +/-  0.6268   10.9046 +/-  0.6268  0.030 / 0.040