PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-18:57:50
G05     48.4           19.7               15.0 +/-    0.73      33.2 +/-    0.73  0.110 / 0.300
G10     236.2          11.5               13.0 +/-   30.58      35.2 +/-   30.58  0.100 / 0.430
G13     77.6           37.4               18.3 +/-    0.57      27.8 +/-    0.57  0.080 / 0.170
G15     123.6          52.1               18.8 +/-    0.95      23.1 +/-    0.95  0.080 / 0.140
G18     245.7          42.7               18.2 +/-    1.40      25.4 +/-    1.40  0.050 / 0.040
G20     27.0           66.9               17.3 +/-    0.71      18.7 +/-    0.71  0.050 / 0.050
G21     314.7          48.8               16.2 +/-    1.04      20.7 +/-    1.04  0.090 / 0.200
G26     292.3          18.8               16.9 +/-    1.45      38.3 +/-    1.45  0.110 / 0.170
G29     152.5          66.6               16.8 +/-    0.35      18.2 +/-    0.35  0.060 / 0.080