PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-00:12:50
G02     84.8962        14.5923          9.5516 +/-  1.7137   23.9937 +/-  1.7137  0.080 / 0.220
G05     44.9653        32.2824          8.9187 +/-  1.2977   14.9111 +/-  1.2977  0.110 / 0.190
G13     96.5284        34.9950         11.2621 +/-  1.0596   17.8745 +/-  1.0596  0.050 / 0.100
G15     145.3234       39.4576         13.5376 +/-  0.9054   19.8666 +/-  0.9054  0.050 / 0.080
G18     233.2100       28.5007         14.9044 +/-  3.1794   26.9419 +/-  3.1794  0.020 / 0.030
G20     11.5954        79.6891          8.9048 +/-  0.7727    9.0358 +/-  0.7727  0.020 / 0.030
G21     299.0732       37.5303         11.1872 +/-  0.3831   16.9640 +/-  0.3831  0.150 / 0.210
G25     203.3807       20.4737         12.4929 +/-  1.1121   27.1732 +/-  1.1121  0.110 / 0.190
G26     303.6274       18.6857         10.6511 +/-  1.8541   24.2028 +/-  1.8541  0.050 / 0.120
G29     106.2918       86.3577         10.1250 +/-  0.5575   10.1434 +/-  0.5575  0.070 / 0.120