PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/22-17:27:40
G10     264.8          36.2               15.5 +/-    0.80      24.1 +/-    0.80  0.080 / 0.150
G13     43.4           20.9               12.8 +/-    2.57      27.6 +/-    2.57  0.140 / 0.120
G15     60.4           49.0               14.5 +/-    0.82      18.6 +/-    0.82  0.040 / 0.030
G16     286.3          11.5               14.0 +/-    3.21      37.7 +/-    3.21  0.040 / 0.030
G18     299.6          64.7               14.3 +/-    0.68      15.6 +/-    0.68  0.180 / 0.280
G20     52.2           37.9               13.3 +/-    1.27      20.1 +/-    1.27  0.230 / 0.230
G21     11.5           72.5               15.7 +/-    0.50      16.4 +/-    0.50  0.060 / 0.080
G24     123.0          12.8               18.7 +/-    2.02      48.9 +/-    2.02  0.060 / 0.080
G27     318.8          18.6               13.9 +/-    2.87      31.6 +/-    2.87  0.080 / 0.280
G29     165.4          28.1               17.3 +/-    1.01      31.5 +/-    1.01  0.190 / 0.440