PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-17:28:10
G01     39.9577        14.0512         11.1830 +/-  1.2738   28.4593 +/-  1.2738  0.070 / 0.230
G06     173.8425       42.4440         15.3445 +/-  0.8621   21.4721 +/-  0.8621  0.070 / 0.220
G13     237.2243       20.4355         14.2386 +/-  1.1273   30.9989 +/-  1.1273  0.040 / 0.040
G15     272.4037       11.3895         14.3073 +/-  1.8195   38.7278 +/-  1.8195  0.030 / 0.040
G17     12.2720        66.6414         12.8030 +/-  0.6070   13.8159 +/-  0.6070  0.140 / 0.260
G19     291.7826       71.6682         13.0434 +/-  0.3555   13.6648 +/-  0.3555  0.140 / 0.280
G24     316.4907       19.8539         12.7938 +/-  2.4488   28.2511 +/-  2.4488  0.060 / 0.120
G28     75.2258        45.4825         13.8252 +/-  0.5180   18.5030 +/-  0.5180  0.080 / 0.120
G30     155.6918       27.2771         14.9961 +/-  1.0687   27.8391 +/-  1.0687  0.160 / 0.400