PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-23:43:10
G10     255.7          29.8               12.2 +/-    1.87      21.4 +/-    1.87  0.030 / 0.050
G13     49.7           27.9                7.4 +/-    1.02      13.5 +/-    1.02  0.040 / 0.050
G15     77.6           56.6                9.4 +/-    0.33      11.0 +/-    0.33  0.170 / 0.230
G16     292.1          14.0                8.2 +/-    2.73      21.0 +/-    2.73  0.160 / 0.250
G18     277.5          58.7               10.4 +/-    0.76      11.9 +/-    0.76  0.100 / 0.130
G20     47.4           42.6                9.2 +/-    0.41      12.9 +/-    0.41  0.100 / 0.110
G21     341.8          64.6                9.3 +/-    0.60      10.2 +/-    0.60  0.050 / 0.060
G26     264.7          13.1               10.1 +/-    1.85      26.2 +/-    1.85  0.040 / 0.080
G27     321.7          11.2               -6.4 +/-   33.26     -17.4 +/-   33.26  0.190 / 0.380
G29     165.2          40.6               11.2 +/-    1.17      16.2 +/-    1.17  0.180 / 0.400