PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-22:42:40
G02     52.2333        40.2818         -8.0279 +/- 49.1289  -11.6230 +/- 49.1289  0.040 / 0.060
G05     74.3654        68.3226          9.9533 +/-  0.4148   10.6260 +/-  0.4148  0.050 / 0.060
G12     185.1833       37.6902         13.0649 +/-  2.6718   19.7563 +/-  2.6718  0.040 / 0.030
G13     134.1849       11.0144          9.0435 +/- 29.0637   24.6829 +/- 29.0637  0.030 / 0.040
G20     203.6153       54.9262         11.5497 +/-  1.0286   13.7722 +/-  1.0286  0.030 / 0.060
G21     265.9651       13.3267         14.0715 +/-  1.4921   36.4319 +/-  1.4921  0.030 / 0.050
G25     238.6038       55.2803         12.2631 +/-  0.5325   14.5689 +/-  0.5325  0.090 / 0.120
G29     325.1592       50.2267         10.8872 +/-  0.9613   13.6923 +/-  0.9613  0.050 / 0.100