PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-02:12:50
G10     269.2160       38.6783         13.9910 +/-  0.7914   20.8017 +/-  0.7914  0.060 / 0.060
G13     41.3940        17.8100          7.8973 +/-  0.7525   18.3362 +/-  0.7525  0.060 / 0.060
G15     59.0454        49.7567          9.6632 +/-  0.6667   12.2233 +/-  0.6667  0.070 / 0.160
G16     278.1534       10.7325         10.5861 +/-  2.8782   29.0712 +/-  2.8782  0.080 / 0.160
G18     302.3200       64.0920          9.7330 +/-  0.9414   10.6932 +/-  0.9414  0.050 / 0.110
G20     56.8880        31.5283          8.1305 +/-  0.8659   13.7995 +/-  0.8659  0.040 / 0.090
G21     7.6626         73.2291         11.3344 +/-  0.9785   11.7838 +/-  0.9785  0.120 / 0.210
G24     119.5218       15.1934         12.7683 +/-  1.8945   31.6103 +/-  1.8945  0.100 / 0.220
G27     316.5575       22.0522          6.7095 +/-  1.2330   14.0484 +/-  1.2330  0.040 / 0.040
G29     167.7084       27.1136         12.7570 +/-  1.3290   23.7678 +/-  1.3290  0.040 / 0.040