PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-08:42:50
G08     270.5          17.9                8.8 +/-    1.68      20.3 +/-    1.68  0.060 / 0.050
G10     60.4           58.6                4.8 +/-    1.14       5.5 +/-    1.14  0.060 / 0.060
G14     260.4          61.6                6.8 +/-    1.00       7.6 +/-    1.00  0.200 / 0.200
G18     312.9          30.7                6.1 +/-    1.28      10.5 +/-    1.28  0.210 / 0.170
G20     102.6          18.4                3.9 +/-    1.60       9.0 +/-    1.60  0.160 / 0.290
G21     154.7          16.0                5.6 +/-    4.29      13.6 +/-    4.29  0.140 / 0.320
G24     39.7           10.0                2.3 +/-    3.41       6.3 +/-    3.41  0.130 / 0.290
G27     231.7          16.0                8.3 +/-    1.20      20.1 +/-    1.20  0.060 / 0.310
G31     176.8          31.8                8.3 +/-    1.50      14.0 +/-    1.50  0.190 / 0.240
G32     344.6          73.9                5.4 +/-    0.42       5.6 +/-    0.42  0.140 / 0.190