PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-22:12:30
G02     38.8602        51.2167          9.9988 +/-  0.5683   12.4263 +/-  0.5683  0.060 / 0.060
G05     122.9459       68.7611         11.2789 +/-  0.4109   12.0092 +/-  0.4109  0.040 / 0.050
G12     189.1962       54.5921         11.9636 +/-  1.7507   14.3161 +/-  1.7507  0.030 / 0.040
G20     199.1894       38.4938         14.4831 +/-  1.4915   21.6007 +/-  1.4915  0.030 / 0.040
G25     270.2632       60.3257         12.5845 +/-  1.4802   14.2512 +/-  1.4802  0.040 / 0.060
G29     315.1079       37.1562         10.7225 +/-  0.7653   16.3662 +/-  0.7653  0.040 / 0.060