PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-18:42:50
G02     206.6663       37.1398         13.7801 +/-  1.4186   21.0391 +/-  1.4186  0.030 / 0.070
G06     141.7779       75.8060         12.1072 +/-  0.7305   12.4481 +/-  0.7305  0.030 / 0.070
G12     311.9448       22.1842          9.4679 +/-  2.3589   19.7614 +/-  2.3589  0.070 / 0.170
G17     44.5556        42.0676         10.8173 +/-  0.8539   15.2249 +/-  0.8539  0.070 / 0.170
G19     18.9211        59.6170         11.8817 +/-  0.6519   13.5393 +/-  0.6519  0.060 / 0.100
G24     292.0860       39.9799         11.2520 +/-  1.4339   16.3711 +/-  1.4339  0.060 / 0.080
G28     109.2031       26.3961         12.9944 +/-  1.8653   24.5995 +/-  1.8653  0.040 / 0.050