PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-12:13:10
G01     127.5          11.2               -3.6 +/-   33.07      -9.9 +/-   33.07  0.030 / 0.030
G07     57.4           68.0                3.3 +/-    0.69       3.5 +/-    0.69  0.020 / 0.040
G08     50.3           38.4               -3.5 +/-   12.40      -5.2 +/-   12.40  0.130 / 0.290
G09     176.1          34.7                0.5 +/-   12.98       0.7 +/-   12.98  0.140 / 0.310
G11     116.4          33.7                9.0 +/-   11.76      14.6 +/-   11.76  0.040 / 0.040
G17     199.1          16.4                4.4 +/-    2.97      10.5 +/-    2.97  0.040 / 0.040
G23     161.1          10.0                3.4 +/-    1.93       9.6 +/-    1.93  0.160 / 0.180
G28     275.4          52.5              -24.0 +/-   52.70     -29.4 +/-   52.70  0.120 / 0.150
G30     329.7          57.9                1.7 +/-    0.62       2.0 +/-    0.62  0.210 / 0.340