PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-22:43:10
G10     299.5          52.1               14.4 +/-    1.89      17.7 +/-    1.89  0.070 / 0.050
G14     210.6          15.2               20.1 +/-    4.02      49.8 +/-    4.02  0.060 / 0.040
G15     45.8           26.7               10.7 +/-    1.91      20.1 +/-    1.91  0.070 / 0.130
G18     2.9            65.6               13.7 +/-    0.68      14.9 +/-    0.68  0.060 / 0.130
G20     73.1           16.4               12.8 +/-    3.33      30.9 +/-    3.33  0.130 / 0.150
G21     104.8          71.3               15.9 +/-    0.53      16.7 +/-    0.53  0.120 / 0.220
G24     96.8           27.3               15.4 +/-    1.08      28.5 +/-    1.08  0.080 / 0.080
G27     296.4          35.9               15.0 +/-    1.98      23.3 +/-    1.98  0.070 / 0.060
G32     212.3          31.3               15.7 +/-    3.61      26.8 +/-    3.61  0.090 / 0.240