PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-09:12:30
G01     224.7971       15.8052          4.5263 +/-  2.1477   11.0397 +/-  2.1477  0.050 / 0.100
G03     286.9646       66.4967          1.8913 +/-  1.1707    2.0429 +/-  1.1707  0.060 / 0.100
G14     88.9922        21.5816          2.2421 +/-  1.5555    4.7477 +/-  1.5555  0.030 / 0.070
G16     146.3875       46.6780          5.5390 +/-  0.7086    7.2919 +/-  0.7086  0.030 / 0.080
G22     208.3397       69.1226          5.5398 +/-  0.4755    5.8858 +/-  0.4755  0.030 / 0.040
G23     307.8056       37.3594          2.8155 +/-  1.0862    4.2821 +/-  1.0862  0.030 / 0.030
G26     96.2220        54.7843          5.2576 +/-  0.4803    6.2787 +/-  0.4803  0.100 / 0.160
G31     45.6407        30.7424          2.1672 +/-  1.0408    3.7374 +/-  1.0408  0.120 / 0.190