PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-23:58:10
G10     267.7          37.9               11.4 +/-    1.30      17.2 +/-    1.30  0.040 / 0.050
G13     42.1           19.1                8.3 +/-    1.16      18.7 +/-    1.16  0.040 / 0.040
G15     59.4           49.4               10.4 +/-    0.84      13.3 +/-    0.84  0.170 / 0.360
G16     280.5          11.1               10.8 +/-    1.49      29.5 +/-    1.49  0.180 / 0.330
G18     301.2          64.2                9.1 +/-    0.71      10.0 +/-    0.71  0.090 / 0.060
G20     55.7           33.1                7.5 +/-    0.93      12.4 +/-    0.93  0.070 / 0.080
G21     6.3            72.7               11.4 +/-    0.77      11.9 +/-    0.77  0.120 / 0.230
G24     120.8          14.4               12.9 +/-    2.09      32.6 +/-    2.09  0.090 / 0.200
G27     317.3          21.0                7.8 +/-    3.84      16.7 +/-    3.84  0.060 / 0.110
G29     167.0          27.5               12.2 +/-    0.96      22.5 +/-    0.96  0.050 / 0.110