PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-18:58:10
G02     210.7020       46.4478         15.5114 +/-  1.2431   20.4841 +/-  1.2431  0.030 / 0.060
G06     94.7969        79.1294         13.4636 +/-  0.2852   13.6841 +/-  0.2852  0.040 / 0.050
G12     316.0624       29.7676         13.7735 +/-  1.5318   24.2375 +/-  1.5318  0.090 / 0.100
G17     52.1193        35.8066         12.4122 +/-  1.1829   19.4082 +/-  1.1829  0.090 / 0.070
G19     31.6873        53.3978         13.0350 +/-  0.9990   15.8010 +/-  0.9990  0.040 / 0.060
G28     116.7053       19.9172         13.6005 +/-  1.3628   29.9860 +/-  1.3628  0.040 / 0.070