PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/08-19:57:40
G10     250.5          25.8               20.1 +/-    2.13      38.6 +/-    2.13  0.150 / 0.330
G13     54.8           31.4               16.9 +/-    0.57      28.8 +/-    0.57  0.090 / 0.300
G15     86.2           57.2               18.3 +/-    1.01      21.3 +/-    1.01  0.170 / 0.330
G16     300.1          13.7               13.9 +/-    2.17      35.8 +/-    2.17  0.140 / 0.340
G18     269.6          56.4               19.5 +/-    0.88      22.9 +/-    0.88  0.050 / 0.060
G20     42.4           48.9               17.1 +/-    0.71      21.9 +/-    0.71  0.040 / 0.060
G21     336.5          61.7               18.3 +/-    0.76      20.5 +/-    0.76  0.060 / 0.140
G26     272.6          15.2               18.0 +/-    1.78      44.6 +/-    1.78  0.050 / 0.150
G29     162.4          44.8               19.6 +/-    0.57      26.5 +/-    0.57  0.050 / 0.070