PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-22:27:50
G02     46.5159        44.9616          8.6007 +/-  0.7912   11.5959 +/-  0.7912  0.040 / 0.060
G05     95.0358        70.6359         10.0655 +/-  0.8663   10.6028 +/-  0.8663  0.040 / 0.060
G12     186.6192       45.0304         11.7646 +/-  0.8443   15.8461 +/-  0.8443  0.040 / 0.060
G20     201.3182       47.5954         11.1862 +/-  1.1604   14.5463 +/-  1.1604  0.040 / 0.050
G25     251.1785       58.7999          9.9248 +/-  1.9202   11.3931 +/-  1.9202  0.040 / 0.050
G29     320.7810       44.2935          9.5844 +/-  0.6914   13.0471 +/-  0.6914  0.040 / 0.040