PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-22:12:50
G10     262.2          34.5               14.7 +/-    1.23      23.6 +/-    1.23  0.070 / 0.070
G13     45.0           23.3               11.2 +/-    2.59      22.8 +/-    2.59  0.070 / 0.070
G15     65.1           52.3               13.1 +/-    0.42      16.1 +/-    0.42  0.210 / 0.320
G16     286.5          12.5               13.6 +/-    2.32      36.0 +/-    2.32  0.190 / 0.320
G18     291.3          62.6               12.5 +/-    0.94      13.8 +/-    0.94  0.050 / 0.090
G20     51.8           37.7               11.6 +/-    0.85      17.6 +/-    0.85  0.070 / 0.070
G21     355.8          69.7               14.2 +/-    0.41      15.0 +/-    0.41  0.160 / 0.250
G24     125.1          11.2                6.6 +/-   39.85      18.0 +/-   39.85  0.200 / 0.210
G27     319.6          16.8               12.6 +/-    1.66      30.0 +/-    1.66  0.040 / 0.040
G29     165.9          32.1               15.1 +/-    0.62      25.3 +/-    0.62  0.040 / 0.040