PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-13:28:10
G08     72.8995        50.0963          7.2051 +/-  0.6340    9.0759 +/-  0.6340  0.070 / 0.120
G09     179.4352       57.4936          8.1067 +/-  1.6169    9.4206 +/-  1.6169  0.050 / 0.110
G11     133.4831       21.6146          8.5028 +/-  1.0215   17.9909 +/-  1.0215  0.060 / 0.090
G23     159.2224       28.9795          8.0080 +/-  1.6799   14.3283 +/-  1.6799  0.050 / 0.090
G27     44.1408        22.2520          5.8671 +/-  1.6748   12.2260 +/-  1.6748  0.050 / 0.050
G28     249.9962       39.8526          7.7613 +/-  0.9324   11.3159 +/-  0.9324  0.030 / 0.050
G30     311.3749       42.2317          5.7054 +/-  1.3581    8.0099 +/-  1.3581  0.090 / 0.180