PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-22:57:40
G08     264.8          17.5               17.0 +/-    1.20      39.9 +/-    1.20  0.190 / 0.260
G10     62.8           58.5               11.6 +/-    0.67      13.4 +/-    0.67  0.230 / 0.300
G11     310.0          18.8               11.8 +/-    2.06      26.7 +/-    2.06  0.180 / 0.350
G14     272.7          68.0               12.7 +/-    0.70      13.6 +/-    0.70  0.240 / 0.420
G18     93.5           34.9               13.1 +/-    0.52      20.9 +/-    0.52  0.150 / 0.300
G21     153.8          11.4               17.9 +/-    3.14      48.3 +/-    3.14  0.080 / 0.230
G24     39.7           10.3                9.3 +/-    2.46      25.9 +/-    2.46  0.040 / 0.050
G27     229.4          14.4               18.0 +/-    2.70      45.4 +/-    2.70  0.040 / 0.050
G31     181.0          28.5               18.1 +/-    1.80      32.8 +/-    1.80  0.080 / 0.110
G32     332.8          73.8               12.3 +/-    0.62      12.7 +/-    0.62  0.060 / 0.110