PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-17:12:40
G10     251.5          26.8               11.3 +/-    1.94      21.3 +/-    1.94  0.040 / 0.030
G13     53.4           30.4               11.0 +/-    2.10      19.1 +/-    2.10  0.050 / 0.030
G15     82.2           56.4               13.3 +/-    0.76      15.7 +/-    0.76  0.160 / 0.270
G16     300.1          13.3                9.0 +/-    1.65      23.3 +/-    1.65  0.120 / 0.240
G18     272.5          58.0               11.5 +/-    1.58      13.3 +/-    1.58  0.050 / 0.050
G20     42.3           49.2                9.8 +/-    0.98      12.4 +/-    0.98  0.060 / 0.060
G21     341.7          63.9               11.2 +/-    0.23      12.4 +/-    0.23  0.090 / 0.110
G26     270.4          14.8                8.8 +/-    1.22      22.1 +/-    1.22  0.100 / 0.130
G29     162.5          42.9               14.0 +/-    0.57      19.4 +/-    0.57  0.120 / 0.390