PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-03:58:00
G08     288.1          23.5                7.8 +/-    1.47      15.7 +/-    1.47  0.030 / 0.020
G10     12.2           63.3                8.4 +/-    0.96       9.3 +/-    0.96  0.020 / 0.020
G14     233.7          51.2                8.6 +/-    2.94      10.7 +/-    2.94  0.020 / 0.030
G18     65.8           50.8                4.1 +/-    1.69       5.1 +/-    1.69  0.030 / 0.030
G21     147.6          37.1                7.6 +/-    1.64      11.6 +/-    1.64  0.080 / 0.080
G24     54.3           25.2                6.2 +/-    3.35      12.1 +/-    3.35  0.060 / 0.090
G27     249.2          29.6                7.6 +/-    1.03      13.4 +/-    1.03  0.180 / 0.240
G32     252.8          69.5                6.7 +/-    0.78       7.1 +/-    0.78  0.230 / 0.170