PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-16:43:00
G01     53.9146        27.5160         11.9454 +/-  1.5244   22.0596 +/-  1.5244  0.060 / 0.150
G06     178.4557       21.1033         14.7254 +/-  2.0646   31.5438 +/-  2.0646  0.060 / 0.160
G07     144.2526       13.2329         13.6314 +/-  1.6856   35.3706 +/-  1.6856  0.020 / 0.030
G11     45.1057        15.8694         12.4191 +/-  1.1724   30.2432 +/-  1.1724  0.020 / 0.030
G13     257.5421       32.5282         13.8865 +/-  1.2185   23.1042 +/-  1.2185  0.180 / 0.510
G15     291.9168       15.3321         12.0261 +/-  1.7974   29.6728 +/-  1.7974  0.170 / 0.430
G17     302.9305       79.9408         13.9150 +/-  0.6607   14.1098 +/-  0.6607  0.070 / 0.280
G19     241.1156       58.4071         14.7889 +/-  0.6345   17.0382 +/-  0.6345  0.120 / 0.300
G28     45.5899        54.5347         13.8566 +/-  0.7591   16.5914 +/-  0.7591  0.050 / 0.070
G30     147.3946       48.6089         14.3296 +/-  0.9757   18.3899 +/-  0.9757  0.040 / 0.050