PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-15:57:50
G01     78.8960        32.9457         11.9205 +/-  0.6287   19.6716 +/-  0.6287  0.070 / 0.120
G11     57.7888        32.2487         10.0191 +/-  1.2320   16.7619 +/-  1.2320  0.050 / 0.120
G13     285.6540       36.8231         10.6326 +/-  1.7206   16.3247 +/-  1.7206  0.040 / 0.050
G15     311.8404       11.3979          9.3362 +/-  1.8145   25.2671 +/-  1.8145  0.040 / 0.030
G17     223.2687       65.2195         14.4902 +/-  1.0964   15.7900 +/-  1.0964  0.040 / 0.060
G19     219.3523       37.4718         14.2595 +/-  1.4641   21.6449 +/-  1.4641  0.030 / 0.040
G28     6.5885         60.5414         11.7611 +/-  0.5601   13.2940 +/-  0.5601  0.120 / 0.400
G30     123.2161       71.1560         13.8964 +/-  0.3550   14.5974 +/-  0.3550  0.110 / 0.300