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         17.2075 +/-  1.7290   22.7239 +/-  1.7290  0.040 / 0.080
G06     94.7969        79.1294         15.0316 +/-  0.4032   15.2777 +/-  0.4032  0.040 / 0.090
G12     316.0624       29.7676         14.1852 +/-  0.9456   24.9620 +/-  0.9456  0.050 / 0.080
G17     52.1193        35.8066         12.2481 +/-  1.1726   19.1517 +/-  1.1726  0.050 / 0.070
G19     31.6873        53.3978         13.9806 +/-  0.6517   16.9472 +/-  0.6517  0.050 / 0.090
G24     280.1342       41.9588         13.0820 +/-  1.3376   18.4434 +/-  1.3376  0.040 / 0.080
G28     116.7053       19.9172         15.9245 +/-  1.9331   35.1099 +/-  1.9331  0.050 / 0.130