PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-05:12:50
G08     268.2540       19.2991          5.0628 +/-  1.6183   11.3324 +/-  1.6183  0.020 / 0.010
G10     54.0617        60.2497          2.7880 +/-  0.5828    3.1593 +/-  0.5828  0.030 / 0.010
G11     311.6111       17.7277          4.8961 +/-  3.5299   11.3910 +/-  3.5299  0.100 / 0.130
G14     263.4331       66.1012          5.3510 +/-  0.8283    5.7954 +/-  0.8283  0.120 / 0.110
G18     87.7743        39.9062          3.8412 +/-  0.6466    5.5955 +/-  0.6466  0.080 / 0.070
G21     153.7590       18.2533          4.6171 +/-  3.4040   10.6037 +/-  3.4040  0.110 / 0.100
G24     41.4721        13.4388          2.1859 +/-  2.0339    5.6444 +/-  2.0339  0.080 / 0.140
G27     232.5044       17.3061          7.0692 +/-  1.5242   16.6183 +/-  1.5242  0.090 / 0.130
G31     178.5949       27.7239          5.8081 +/-  0.7220   10.6772 +/-  0.7220  0.110 / 0.360
G32     325.8464       75.1755          4.2998 +/-  0.5158    4.4322 +/-  0.5158  0.110 / 0.360