PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-21:28:10
G10     262.7          34.8               16.4 +/-    1.63      26.1 +/-    1.63  0.080 / 0.100
G13     44.7           22.8               11.9 +/-    2.64      24.4 +/-    2.64  0.080 / 0.090
G15     64.1           51.7               14.9 +/-    0.94      18.4 +/-    0.94  0.200 / 0.350
G16     286.5          12.3               16.1 +/-    1.98      42.7 +/-    1.98  0.220 / 0.260
G18     292.7          63.0               14.7 +/-    0.92      16.3 +/-    0.92  0.040 / 0.040
G20     51.9           37.6               13.4 +/-    1.16      20.3 +/-    1.16  0.040 / 0.030
G21     357.8          70.2               15.3 +/-    0.43      16.2 +/-    0.43  0.040 / 0.070
G24     124.7          11.5               10.3 +/-   37.88      27.8 +/-   37.88  0.050 / 0.090
G27     319.5          17.2               14.7 +/-    1.65      34.8 +/-    1.65  0.150 / 0.230
G29     165.7          31.2               15.6 +/-    0.94      26.7 +/-    0.94  0.180 / 0.230