PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-00:58:10
G01     320.8          11.2              -15.2 +/-   30.94     -41.5 +/-   30.94  0.100 / 0.440
G08     263.3          17.1               11.2 +/-    2.57      26.6 +/-    2.57  0.120 / 0.320
G10     64.7           58.1                8.3 +/-    0.61       9.6 +/-    0.61  0.140 / 0.330
G11     308.8          20.0               10.3 +/-    1.87      22.7 +/-    1.87  0.160 / 0.360
G14     276.2          68.8                9.1 +/-    0.76       9.7 +/-    0.76  0.020 / 0.030
G18     94.2           34.8                9.1 +/-    0.50      14.5 +/-    0.50  0.030 / 0.050
G21     154.2          11.5               10.1 +/-    2.28      27.3 +/-    2.28  0.250 / 0.430
G27     228.5          13.7               12.8 +/-    3.99      32.9 +/-    3.99  0.240 / 0.340
G31     179.6          31.0               12.8 +/-    1.79      22.0 +/-    1.79  0.040 / 0.040
G32     335.9          73.4                8.4 +/-    0.46       8.8 +/-    0.46  0.040 / 0.060