PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-23:43:10
G10     266.5          37.1                9.7 +/-    1.04      14.9 +/-    1.04  0.160 / 0.360
G13     42.7           20.1                8.2 +/-    1.88      18.0 +/-    1.88  0.160 / 0.340
G15     60.6           50.2               12.5 +/-    0.55      15.7 +/-    0.55  0.090 / 0.090
G16     281.8          11.5               10.9 +/-    2.55      29.3 +/-    2.55  0.070 / 0.070
G18     298.8          63.9                8.0 +/-    0.95       8.8 +/-    0.95  0.150 / 0.240
G20     54.8           34.1                8.3 +/-    1.63      13.4 +/-    1.63  0.140 / 0.300
G21     3.4            72.0               10.6 +/-    0.85      11.1 +/-    0.85  0.040 / 0.120
G24     121.8          13.7               11.4 +/-    2.14      29.3 +/-    2.14  0.060 / 0.110
G27     317.9          20.1                9.3 +/-    2.66      20.4 +/-    2.66  0.050 / 0.060
G29     166.8          28.6               11.7 +/-    1.13      21.1 +/-    1.13  0.040 / 0.050