PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-12:27:40
G07     44.1           68.5                3.3 +/-    0.50       3.5 +/-    0.50  0.140 / 0.300
G08     54.2           41.9               -5.3 +/-   13.95      -7.4 +/-   13.95  0.130 / 0.260
G11     121.1          31.0                8.3 +/-   13.17      14.2 +/-   13.17  0.030 / 0.040
G17     198.7          11.8               -1.3 +/-   13.42      -3.5 +/-   13.42  0.040 / 0.040
G23     161.0          14.4                3.2 +/-    1.63       8.0 +/-    1.63  0.030 / 0.020
G27     38.0           10.7                4.0 +/-    1.49      11.1 +/-    1.49  0.020 / 0.030
G28     268.4          49.8              -20.3 +/-   51.51     -25.7 +/-   51.51  0.330 / 0.220
G30     324.8          53.9                3.0 +/-    0.93       3.6 +/-    0.93  0.050 / 0.190