PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-14:12:40
G01     125.7688       12.4481          4.6100 +/-  8.7265   12.1827 +/-  8.7265  0.110 / 0.600
G07     64.7893        67.0159         24.1918 +/- 10.6699   26.0414 +/- 10.6699  0.110 / 0.530
G08     48.9090        36.8234         15.5528 +/-  7.8644   23.8788 +/-  7.8644  0.070 / 0.260
G09     176.7683       33.6649         -1.9402 +/- 13.7423   -3.1576 +/- 13.7423  0.100 / 0.260
G11     113.5362       34.6209         10.0155 +/-  2.5381   16.0072 +/-  2.5381  0.050 / 0.100
G13     321.5267       10.8466         -5.7209 +/- 16.1642  -15.6716 +/- 16.1642  0.050 / 0.110
G17     199.3690       18.2790          7.6062 +/-  3.0625   17.4575 +/-  3.0625  0.030 / 0.040
G28     278.3745       53.3589        -61.5700 +/- 61.6164  -74.6669 +/- 61.6164  0.030 / 0.040
G30     331.4158       59.1936         13.3061 +/-  3.6434   15.2199 +/-  3.6434  0.050 / 0.050