PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-23:42:50
G08     296.8          23.0               12.9 +/-    0.80      26.4 +/-    0.80  0.060 / 0.090
G10     354.7          62.5               10.4 +/-    0.94      11.5 +/-    0.94  0.060 / 0.090
G14     226.2          43.6               16.5 +/-    0.98      22.7 +/-    0.98  0.050 / 0.070
G18     56.9           53.8               11.6 +/-    0.88      14.0 +/-    0.88  0.050 / 0.080
G21     143.2          43.5               15.2 +/-    0.86      20.9 +/-    0.86  0.030 / 0.030
G24     62.1           28.4                9.7 +/-    0.80      17.5 +/-    0.80  0.050 / 0.030
G27     257.9          33.7               14.8 +/-    1.46      24.1 +/-    1.46  0.100 / 0.100
G32     236.6          60.4               14.0 +/-    0.48      15.9 +/-    0.48  0.100 / 0.100