PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-04:42:40
G01     320.5          12.5                2.4 +/-   17.80       6.4 +/-   17.80  0.160 / 0.250
G08     261.8          16.4                7.2 +/-   10.83      17.3 +/-   10.83  0.160 / 0.290
G10     67.0           57.6                4.5 +/-    3.31       5.3 +/-    3.31  0.060 / 0.060
G11     306.9          21.7                3.8 +/-    1.68       8.1 +/-    1.68  0.050 / 0.050
G14     280.8          69.6                4.8 +/-    1.31       5.1 +/-    1.31  0.110 / 0.380
G18     94.7           35.2               -1.4 +/-   31.08      -2.2 +/-   31.08  0.140 / 0.360
G21     154.8          11.6                5.4 +/-    7.47      14.5 +/-    7.47  0.030 / 0.040
G27     227.5          12.7                8.0 +/-   11.09      21.0 +/-   11.09  0.030 / 0.040
G31     177.5          34.5                9.8 +/-    5.38      15.6 +/-    5.38  0.150 / 0.370
G32     348.1          72.3                6.2 +/-    4.82       6.5 +/-    4.82  0.130 / 0.490