PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-15:43:10
G01     86.7434        32.1702         13.1075 +/-  1.0077   21.9630 +/-  1.0077  0.060 / 0.120
G11     63.8837        35.7628         10.0782 +/-  1.1755   15.7713 +/-  1.1755  0.050 / 0.130
G13     293.5519       35.5777         11.0991 +/-  1.2867   17.4277 +/-  1.2867  0.030 / 0.040
G17     216.2724       58.7795         14.6646 +/-  0.6108   16.8372 +/-  0.6108  0.030 / 0.040
G19     215.6669       31.3234         13.6387 +/-  0.6917   23.2442 +/-  0.6917  0.040 / 0.040
G28     354.0818       61.3565         12.1485 +/-  0.9820   13.6377 +/-  0.9820  0.030 / 0.050
G30     105.6976       76.5100         13.4838 +/-  0.4394   13.8260 +/-  0.4394  0.050 / 0.120