PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-19:27:40
G08     307.2          20.0               19.0 +/-    1.37      41.8 +/-    1.37  0.060 / 0.090
G10     334.7          60.3                8.8 +/-    0.35      10.0 +/-    0.35  0.100 / 0.090
G14     219.5          33.6               13.4 +/-    2.38      21.8 +/-    2.38  0.030 / 0.050
G18     44.2           57.6               10.8 +/-    0.38      12.6 +/-    0.38  0.030 / 0.050
G21     136.0          50.6               13.4 +/-    0.90      16.8 +/-    0.90  0.070 / 0.070
G24     72.8           30.4               10.0 +/-    0.95      17.4 +/-    0.95  0.100 / 0.060
G27     270.2          37.1               11.7 +/-    2.61      17.9 +/-    2.61  0.130 / 0.060
G32     225.5          52.6               12.6 +/-    2.59      15.4 +/-    2.59  0.120 / 0.060