PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-09:57:50
G08     272.7          18.3                5.7 +/-    1.52      13.1 +/-    1.52  0.050 / 0.070
G10     57.9           59.2                5.0 +/-    1.04       5.8 +/-    1.04  0.050 / 0.050
G11     313.6          14.9               -8.3 +/-    3.81     -20.8 +/-    3.81  0.030 / 0.030
G14     258.9          61.5                5.5 +/-    0.64       6.2 +/-    0.64  0.020 / 0.040
G18     313.5          29.5                6.9 +/-    1.76      12.3 +/-    1.76  0.110 / 0.240
G21     154.4          16.9                4.5 +/-    2.10      10.6 +/-    2.10  0.120 / 0.230
G24     40.3           11.1                3.5 +/-    1.06       9.5 +/-    1.06  0.140 / 0.280
G27     232.5          16.8                5.4 +/-    1.80      12.8 +/-    1.80  0.150 / 0.440
G31     177.2          30.4                5.9 +/-    1.30      10.2 +/-    1.30  0.140 / 0.530
G32     339.8          74.5                7.2 +/-    0.62       7.5 +/-    0.62  0.100 / 0.220